Sabtu, 16 September 2017

High Efficiency Halogen Lamps Are a Better Energy Efficient Lighting Option For Recessed Downlights

For many homeowners, especially those with children, the kitchen is the most lived-in room in the house. It's a gathering place, a workspace, a study area, an entertainment venue and of course, a room in which to enjoy meals together. Thus, it's not uncommon for kitchen lights to be switched on for four or more hours per day. This presents a legitimate opportunity to save money and reduce air pollution and landfill waste by switching to energy-efficient lighting solutions.

As a source of both ambient and task light, recessed downlights ("cans") are widely used in American kitchens. These fixtures push light down and away to light an area and a work surface at the same time. To enable the homeowner to add ambience, they're often controlled by a dimmer switch.

For homeowners motivated to make a small investment to reduce their electricity use and/or carbon footprint, a simple light bulb retrofit in their existing kitchen fixtures is a smart and easy strategy. Simply remove the existing high wattage (commonly 65-90 watts) bulbs, and insert lower wattage eco-friendly lamps which yield equivalent light output (lumens). But since there are two types of lower cost energy-efficient lighting options from which to choose, which is preferable in this application?

High-Efficiency Halogen Lamps Beat Compact Fluorescent Lamps

We've looked at this question from many angles and have concluded that screw-in (self-ballasted) CFL reflector lamps, for many the obvious choice, are an inferior, energy-efficient lighting solution. Very few consumers are familiar with the new high-efficiency halogen lamps ("HEH") which have hit the market in the last few years. The best of these models already exceed the energy efficiency requirements for incandescent reflector lamps scheduled to take effect in July 2012.

Here, we cite nine reasons why we believe high-efficiency halogen lamps, controlled by a pre-set dimmer switch, offer overall superior, energy-efficient lighting value to CFLs starting with the most important factor for electric light sources, whether energy efficient or not: light characteristics.

Reason 1 - Great Light:

    Halogen light is legendary for being white, bright, crisp, and punchy and making colors appear vivid.
    The light cast by CFL reflectors, while typically warm white, is average at best.

Reason 2 - Superior Illuminance:

    "Illuminance" describes the amount of light on a horizontal surface, measured in "foot candles."
    High-efficiency halogen lamps, especially those with a PAR (Parabolic Aluminized Reflector) configuration, throw concentrated light downwards measurably better than CFL reflectors.
    The result? Much more artificial light where it's needed.

Reason 3 - Effortless Dimming:

    No artificial light source dims better than an incandescent lamp. High-efficiency halogen lamps use improved incandescent technology and don't require special dimmer switches.
    Dimmable CFLs cost more than non-dimmable versions. But dimmable doesn't translate into impressive dimming performance.

Reason 4 - Dimming = Longer Lamp Life:

    Dimming any lamp is an energy-efficient lighting strategy because it reduces electricity consumption and harmful gas emissions. There's an added green benefit when dimming high-efficiency halogen lamps: it extends the lifetime of the lamp.
    For example, constant dimming by just 15% (a pre-set dimmer enables this) will triple the life of the bulb, thereby reducing landfill waste and replacement costs.
    For premium high-efficiency halogen lamps, this translates into 9,000 to 12,000 hours, roughly the same as the average rated life of an Energy Star rated CFL reflector (whose projected life is static even if dimmed).

Reason 5 - Instant On:

    Just like non-halogen incandescent bulbs, halogen lamps reach full brightness with the flick of a switch.
    State-of-the-art CFL reflectors will start instantly but take 30 seconds to a minute's time to reach full brightness (depending on the ambient room temperature).

Reason 6 - Mercury-Free:

    High-efficiency halogen lamps operate without the use of mercury.
    All CFLs contain mercury which must be vaporized to create ultraviolet energy and subsequently, visible light.
    Since mercury is a toxic substance, this necessitates proper recycling at the end of a CFL's life.
    Further, while breakage in a recessed can is a low probability risk, an accident would cause mercury to contaminate the area below.

Reason 7 - Reliability:

    High-efficiency halogen lamps don't contain any electronic components.
    Unlike a screw-in CFL, which contains a precise electronic component called a ballast, neither frequent on/off switching, nor trapped heat will affect the performance or lifespan of these energy-efficient lighting solutions.

Reason 8 - Lumen Maintenance:

    Lumens are the measure of the amount of light emitted by a light source. High-efficiency halogen lamps maintain their initial lumens for as long as they operate.
    CFLs, using different technology, will gradually dim by about 25% over their lifetime.
    Why does this matter? Studies have shown that at age 65, the eyes need three times more light to see as well as at age 20.
    With CFLs in a kitchen, vision needs and light output are moving in opposite directions as time passes.

The Rest of the Story - High-Efficiency Halogen Lamps Are Greener

Reason 9 - Better, REAL Energy-Efficient Lighting:

    The commonly used metric for comparing energy-efficient lighting is lumens of output per watt of electrical input. This method is appropriate for omni-directional bulbs such as traditional A-shape lamps and spiral CFLs.
    Directional lamps (floodlights, spotlights) are different. Their job is not to glow, but to throw light into a defined area or onto a specific surface.
    Compare the measured light (illuminance) on a horizontal surface from two floodlights, a 16 watt CFL BR30 (630 lumens) and a 34 watt HEH PAR30 (1) (612 lumens).
    The CFL has 39 lumens per watt vs. 18 for the HEH. Thus, by conventional measures the CFL is more than twice as energy efficient.
    Measured illuminance tells a very different story: the CFL floodlight casts just 15 foot candles of light onto the work surface in this demonstration. The HEH? 51 foot candles.(2)
    Therefore, at 1.5 foot candles per watt, the HEH bulb is 60% more efficient in real terms than the CFL (0.9 foot candles per watt).
    Or viewed another way, using typical recessed downlight fixtures, to produce an equivalent amount of light on a kitchen countertop or table, where important tasks such as food preparation and schoolwork are performed, a 54 watt CFL floodlight would be needed.
    Not only would such a lamp be more expensive to purchase, it would cost 36% more to operate and generate 36% more air pollution than the high-efficiency halogen lamp.

Notes for Previous Example

1. A 40 watt model was dimmed by 15% to reduce lumen output from 720 to 612.

2. Measured distance of each light source to the surface of the light meter instrument was 50 inches.

Illuminating the Perks of Energy-Efficient Lighting

Impressive consumer value is sometimes found where it's least expected. We're all for selectively installing energy-efficient lighting around the home and place of business because it leverages the fact that the cheapest and cleanest kilowatt of electricity is the one that's never produced in the first place. But if light bulb buyers only paid attention to the popular media or followed Energy Star prescriptions, they would only know to consider CFL reflectors as an affordable, energy-efficient lighting solution for their oft-used recessed downlights.

As we've argued here, the exciting new high-efficiency halogen lamps (spot and floodlights), which are generally priced on par with premium quality dimmable CFL reflectors, are superior energy-efficient lighting solutions for consumers who value great light characteristics, thrift, dimming performance and environmental sustainability for their lighting dollar.

Selasa, 29 Agustus 2017

Blinds Between the Glass and the Energy Efficiency Myth

"Blinds Between the Glass" refers to an innovative window system that features blinds or shades that are permanently sealed within a double-glazed cavity. Surprisingly, they have been around for a long time. According to Pella, one of America's leading window manufacturers, they first introduced between-the-glass blinds in 1966. It's only in the last few years, however, that they have surged in popularity to become a mainstream window option for homeowners who like a clean, modern look and the idea of minimal maintenance.

Companies that manufacture them cite their hygienic, maintenance-free convenience, their uniform and stylish good looks, and their innovative sun-shading and privacy features. As for homeowners with children or pets, their cordless design is a safety feature that is especially appealing. For allergy sufferers, eliminating dust-collecting draperies and airborn allergens seems like a pretty good incentive to purchase.

But are they energy efficient?In these days of soaring energy bills and dwindling resources, both personal and planetary, absolutely every homeowner is most concerned with energy efficiency when buying replacement doors or windows. It's the one issue that probably trumps all others, because no one wants to see their hard-earned dollars vanish out the window.

So the question must be asked: Are blinds between the glass windows and doors really as energy-efficient as some claim? The only way to truly answer that question is to understand (a) what energy efficiency means in terms of windows and doors specifically and (b) how this type of window option is put together.

Window and Door Energy Efficiency 101

Modern windows are smart windows, and window science has completely changed how we understand energy efficiency. The measuring stick we use to gauge the energy efficiency of a window is sophisticated indeed.

We've known for some time that glass by itself is a poor insulator; however, double-paned windows created a revolution in the window marketplace. With double-paned windows, the two pieces of glass seal a layer of air between them, thus providing added insulation.

But there was another revolution in energy efficiency on the horizon, thanks to Low-E glass and argon gas. Low-E (low-emissivity) is a thin coating of transparent metallic material that's applied to window glass for insulating purposes. The Low-E coating helps to prevent heat gain (or loss) in your home by acting as a kind of reflective shield, pushing radiant heat that tries to pass through the glass back to the source it originates from. Argon is a heavy, invisible, non-toxic gas that is a far better insulator than air-the weight of this gas dramatically reduces the amount of heat that can pass through the space between two panes of glass.

Today's windows are in large part energy efficient because of the treated glass and the use of argon gas. Using stainless steel spacers for insulating performance and paying special attention to framing materials that permit only a low coefficient of thermal expansion so temperature variations don't loosen the bond or create gaps are also important. But a Low-E coating is the critical element in making windows energy efficient.

How Do They Do That?

A popular TV ad asks, How do they get the caramel in the Caramilk bar? One could well ask the same question of blinds-between-the-glass windows and doors. How do they get the blinds in between the glass?

There are two ways in which these windows and doors are manufactured. First, many blinds-between-the-glass windows and doors are constructed like a glass "sandwich." In other words, the blinds are inserted between two panes of glass. A Low-E coating is not applied, because silver oxide is especially sensitive to scratching. And there is minimal room in a glass sandwich with a blind for the maximum benefit of an argon gas fill. In comparison, there's simply no way a window with between-the-glass blinds can reduce your energy bills as much as a sealed double-pane window.

The Triple Pane Option

With time, and in an effort to make windows with blinds between the glass more energy-efficient, some window companies turned them into triple-paned windows. That means they have three pieces of glass with two spaces in between: one space holds the between-the-glass blinds, while the other space has a Low-E coating and argon fill.

While triple-paned windows with blinds between the glass may be more energy efficient, just be aware that the extra piece of glass makes the windows bulkier. The biggest drawback to the triple-paned windows however is the cost. They are significantly more expensive because you're basically paying for two windows-one with modern, energy-efficient technology, and one with between-the-glass blinds.

The Blinds Between: Innovation without the Science

One of the arguments put forth claims that the Low-E glass and the internal blinds together contribute to making the entire glass unit more energy efficient, that the internal blinds absorb solar heat gain. Let's take a closer look at that claim.

There are no blinds-or window covering of any kind for that matter-that can significantly increase thermal efficiency and match that of a sealed glass unit with an argon gas fill and a Low-E coating. In fact, the blinds between the glass actually diminish the amount of argon gas you can put between those two pieces of glass, ultimately compromising the energy efficiency of the total package.

But most notable of all is this very simple fact: blinds, drapes, shades, and all other window coverings only marginally impact energy efficiency in one way: by blocking visible light transmission. In other words, sunlight! So even if your blinds are on the inside of the glass, it's going to amount to the same heat reduction and light reduction that you would get from just pulling the drapes across or drawing a regular blind on a sunny day. You are simply blocking light, not increasing the actual energy efficiency of the window.

The Bottom Line

To sum up, this "augmented" energy efficiency derived from blinds between the glass is largely unfounded, and for two main reasons: internal blinds cannot absorb the solar heat gain and Low-E is absolutely essential for any sort of significant energy efficiency. It's the only way to reflect radiant heat back to the source. Otherwise, heat transfers easily through the glass sandwich-blinds or no blinds. Inside or out!

You could save a lot of money and get equal or better energy performance from energy-efficient, double-paned windows with Low-E coatings and argon gas. But if you really love the look, then by all means go for it. Just know that your best energy efficiency option will be the triple pane solution.

Selasa, 15 Agustus 2017

Benefits of Energy Efficient Appliances and How They Can Improve Your Life and Wallet

The most significant benefit of energy efficient appliances is... it preserves the environment! This is based on the fact that the energy we use to run our homes comes from power plants. Power plants burn fossil fuels to power electric products. The burning of fossil fuels causes air pollution and is the main cause of acid rain, smog, and global warming. According to the American Council for an Energy-Efficient Economy, we could remove the need of 25 power plants if every American home used energy-efficient major appliances. However most of us think of another benefit of energy efficient appliances, it saves money. By using energy efficient appliances, you can save up to $400 per year on utility bills. Plus energy efficient appliances have an extended working life. By buying energy efficient appliances, you qualify for an energy tax credit on top of saving on your monthly utility bill.

To truly enjoy the benefits of an efficient appliance, you must first own one. Here are a few tips when shopping for an energy-efficient appliance:

• Measure the space you plan to place your appliance to make sure it will fit. Don't forget to make sure there is enough room to open the door and enough room for you to walk by.
• Think about how much time you would use the appliance. When deciding between two models, the purchase price and estimated energy usage should come into play. If you are planning to use the appliance a lot, you may actually save money by buying the more expensive. Usually the pricier product is the more energy efficient the model is.
• Don't be afraid to ask about special energy efficient offers. To encourage buyers to purchase efficient appliances, most often a store or manufacture will offer cash rebates or other incentive programs.
• Read the Energy Guide label! This yellow and black label states the projected annual energy use of the appliance. Use this to compare the amount of annual energy use to competing brands and models.
• Look for the Energy Star logo. Energy Star appliances are drastically more efficient and allow you to take advantage of the Energy Star benefits.

Another grate benefits of energy efficient appliances it there is a tax credit waiting for anyone who buys and uses efficient products. The United States approved for tax credits for the purchase of efficient homes and products. Energy efficient products can include everything from air conditioning, windows and solar panels, plus appliances like washing machines, freezers, and refrigerators.

The consumer is the one who is benefiting from the Energy Star standards being met in major appliances. Giving a tax break to manufactures who meet Energy Star qualification, the consumer can have a wide variety of efficient products with high quality and competitive pricing. Every energy efficient appliance has two price tags. The first is what we pay when we purchase the appliance. The second is the cost it will take to operate the appliance during its lifetime. Make sure your perches are based on the second price tag. This will save you the most amount of money in the long run and it will save the environment as well.

Jumat, 28 Juli 2017

How to Improve Your Home Energy Efficiency Rating

When your utility bills keep going up and your appliances keep getting older, you know that your home is not as energy efficient as you would like it to be. It is to your best interests to maintain a "green" home that uses energy efficiently. Improving your rating will result in significant savings on monthly utility bills and reduce environmental pollution.

Understand Ratings

Newer appliances and equipment are designed to save energy. However, some products are more energy-efficient than others. Knowing how to interpret energy ratings will help you choose products that will save you more energy dollars in the long run.

Products with the Energy Star label exceed the energy consumption standards set by the federal government. They may also come with energy-saving features. Thus, an Energy Star product is energy efficient.

Refrigerators and freezers are labeled with the number of kilowatt-hours of electricity the appliance uses in one year of operation. A smaller number means the appliance is more efficient.

For central air conditioners, the SEER (Seasonal Energy Efficiency Rating) measures its efficiency. The higher the number the more efficient it is. You want a unit with a SEER of 12 or more.

Room air conditioners are rated with EER (Energy Efficiency Rating). Look for a unit with higher EER.

Washing machines and dishwashers are rated with an EF or energy factor, the number of cycles that can be completed using 1 kilowatt-hour of electricity. You want a washing machine with an EF of at least 2.5, and a dishwasher with an EF of 0.52 or greater.

How To Improve Your Rating

Home improvement projects to enhance the efficiency rating of your home can save money on utility bills. Prioritize your projects and prepare a budget so that you will know where to begin.

You can undertake the following home improvement tasks to save energy at home:

1. Insulation: Reduce energy waste with proper insulation. About half of the average household's energy demand is for heating and cooling. Stop air leakage and add new insulation to reduce your utility bill dramatically.

2. Install energy efficient windows and doors. Double or triple glazed windows can increase home efficiency at a more affordable cost than a major home renovation. Weather strip doors to eliminate drafts and create an air seal.

3. Heating, ventilation and cooling systems today are more efficient. Keep your HVAC system well maintained to improve efficiency. If it's time to replace your heating or cooling unit, you will benefit from the newer systems that use less energy to do the same amount of heating or cooling.

4. Practice good energy conservation habits. Turn off lights when not needed. Lower the thermostat one or two degrees. These practices may not seem like much but they will help boost the energy efficiency rating of your home.

Sabtu, 15 Juli 2017

A Step By Step Guided Plan To An Energy Efficient Home Saving You Thousands

You need a plan to prepare for your future, your energy future that is. Energy Efficient Homes are the hot commodity amongst real estate professionals, designers and builders these days - but why? The short answer is that these homes will SAVE you tons of money. The amount of money you're going to save through implementing energy efficient home strategies is staggering and will only grow as energy prices continue to rise to an all time high.

There has never been a more crucial time to gain the maximum benefit you can for your wallet and home. These simple techniques coupled with an organized, well thought out approach will provide you a road map for the savings you're seeking. If you're tired of increasing energy bills and can't seem to find a better way to save some green then going green will accomplish your goals and provide a healthier home for you and your family - Not to mention the increased equity you'll get from making minor but substantial improvements. So how do you achieve an energy efficient home, providing savings, health, and peace of mind?

An energy efficient home can be summed up into 7 simple steps and strategies. Through programs which teach these simple techniques in great detail you can gain the competitive advantage and get on track to your energy goals. Distinguish yourself as the most energy efficient home on the block! Ok, to get to it. The first step towards saving money every month is:

STEP 1 - YOU Must Commit To Continuing Improvement.

The behavior of you and your family is one of the single most important aspects of saving energy at home. In our Americanized view of, "bigger is better" and "more baby more", we can have a hard time grappling the concept of conscious conservation. The good news is this can become FUN! Imagine playing games with your kids, spending quality bonding time, finding more creative ways to save Energy, use less and teach them great life lessons in frugality! People who really see the financial returns from their home performance continue to strive to achieve higher and better performance with regular assessment of their homes energy performance, creating a breeding ground for savings and a healthier environment. Commitment is the key here. Without it, you'll never get anywhere. Are you committed to saving money, energy, and creating a better world?

STEP 2: Understanding Where You Are At

In order to know where you want to go you must know where you are. Many home owners bock at this not wanting to pick up the phone or pay a few bucks for a professional energy audit to be done on their future energy efficient home, but I assure you it will be a growing and learning experience. An energy audit will allow you to identify where you can best allocate your resources to gain the maximum amount of savings, putting your hard earned money to work for you. Also, and energy audit will give you a baseline where you can measure your homes energy efficiency and performance once you get on track to your energy efficient home goals.

STEP 3: What Are Your Energy Goals?

In order to achieve a performing energy efficient home which will save you money you need to have clearly laid out goals and how you will achieve them. Not to sound like another self help book (I read a lot of them!) but truth is truth. You need to know where you are, where you're going and have a plan to get you there. The alternative, floating in space hoping that electric bill miraculously goes down by $200 in the spring - not likely. Yet again here is another opportunity to bring the family closer together and motivate everyone to achieve the energy goals.

STEP 4: Creating Your Plan

As an Architect I work a lot with plans - as you might guess. We don't go build the building and hope it works out! There is preparation and a laid out plan to get the end result. So decide what you are going to do to achieve your goals. How are you going to do it? Who is going to do what? Get the family involved and realize it's easier than you imagine - you just need to get going and momentum along with an action plan will get you saving money sooner than you think.

STEP 5: Execute Your Plan

This is where your energy efficient home is made - in the execution. A lot of people start things all the time, but the gold goes to those who see the plan through and play like champions to the final buzzer. Get your family motivated, set weekly energy goals or habits, get creative and make it happen.

STEP 6: Take A Look In Your Review Mirror.

We're all familiar will evaluations. Evaluations in your job are the most common but you need to do the same in your energy efficient home. You're going to gain so much insight with the evaluation process in the form of knowledge on how to keep gaining the most you can in savings with your home. Opportunities for further savings will come out of unexpected places and create new revenue streams to be saved, invested, or heck, take the family out to a fancy dinner and movie! This brings me to my final point...

STEP 7 - Reward Your Accomplishments

You finally did it. You're sitting in your energy efficient home with a smile on your face and a little fatter wallet. Take those extra family holidays or save more for an earlier retirement, all the while knowing you are doing your part to save the only resource we all share, but take for granted - our planet. The bottom line is you CAN have an energy efficient home and it is only up to you. With so many great books, eBooks, articles, companies and industries aimed at helping you get to your energy efficient home goals you won't have any trouble if you stick to the plan. I'm here to help you. Post a comment below and let me know what you struggle with in achieving your home energy efficient Goals

To Saving Money and Energy!

Kamis, 29 Juni 2017

Energy Efficient Window Film Vs New Windows - Comparison on Performance

First you need to find out if you really need new windows.

Here are some questions for you, answer as if the cost wasn't an issue:

    In Winter time frost or ice forms on the inside of your windows panes?
    You never get to hear your fridge motor, even at nights?
    You live on a busy street and cars and noises bother you all the time?
    In cold weather your windows let the cold air in, you can see your draperies moving and feel cold air sometimes?
    Your windows are difficult to operate, elders and children may be at risk in case of emergency? (Are your windows too heavy?)
    Are your frames rotten, or you have dry rots around the outside of your windows?
    Are your windows are aesthetically unappealing?
    Can you see light through your window frames?
    Are you just looking to save money on your energy bill?
    You got aluminum framed windows and these are damaged, faded to rusted brown, yellowish, or so.?
    Do you see broken seals around your window frames, the grids are fallen, or have another major issue?
    You are building an addition or remodeling a room?
    You got a room that is too dark, has a nice area for a better window and/or needs natural light?
    Paint is falling off the outer / inner adjacent area to your window?
    Does your double pane windows, accumulate water, moist, mold, vapor, fog, etc?
    Does someone in home uses Oxygen for medical proposes?
    Can you hear your windows shaking when slamming a door?

Here is the best advise: Get a Professional offering you a free estimate for your new windows, and decide if they are or not for you. Decide if you are going to be buying new windows and when...Please do not let them over price this for you. A Better Quality Window, with life time warranty and the best looking on Vinyl frames retrofit or replacement windows shouldn't take you to bankruptcy... Here we have analyzed several of the best brands...Ask me. (Can't publish for obvious reasons) But please do not fall for the cheap ones, nor the one price fits could regret it sooner or later.

Now here is the comparison between energy efficient windows Vs. Energy efficient film, on its performance.

NOTE: - We are departing that none of the above questions in the first section is an issue on your case.

Energy efficient window film

Think on energy efficient window film in situations where you have older, or low-efficiency, but still airtight windows and if you need to increase their energy efficiency without spending a lot of money on new windows. These films cut on radiant heat passing through your windows and also reduce UV radiation entering the home and a little bit the amount of visible spectrum light as well. Help avoid color fading and so much advantages mentioned in this site.

Energy efficient window film is very easy and fast to install: You wouldn't need a highly trained contractor, so you save money on the installation as well. (Find the link with instructions at the bottom of this article)

Of course, energy efficient window film doesn't block out all infrared radiation, but it does get most of it: rejecting 99% of the UV radiation reducing fading and the risk of skin cancer.. And it provides close to the same level of energy efficiency as buying new windows with low-E coatings, assuming you are not in the situations listed above.

Energy efficient window film, can block up to 38% of the heat loss that normally escapes through your windows in winter, and up to 70% of the solar energy that normally enters through the windows in summer.

In addition to the energy saving benefits, solar window film can increase thermal comfort and reduce glare.

If you came finding technical information, here are some amazing numbers about the efficiency offered by some of the best of these films:

    Total Solar Energy Rejected more than 70%
    UV Light Rejected Almost 100%
    Glare Reduction more than 80%
    Visible Light Reflected Exterior more than 40%
    Solar Heat Reduction almost 70%

Energy efficient Double Pane windows (Replacement vinyl framed windows)

Obviously there is no comparison on the performance of these extremely high technology products. And is not due to the dual glass panes compared against the single pane windows, And not only the multilayered films that come in both of the panes of these windows, but in top of that now they come with Argon gas filling between the glass panes, (Argon is a harmless gas, very dense and bad conductor of heat, always present on the air we breath all the time; so is not scary.)

The sophisticated and technologically advanced material used in the construction of the frames of these windows, together with the very unique design of the vinyl frame profiles, the quality of the new technology applied to gaskets and seals, spacers, etc. There is no match on the efficiency obtained. These new windows may save up to 40% of your utility bill under certain conditions.

You will need a responsible and reputable professional advise to learn about your possible savings. It all depends on where you live and how do you live. He will know with a few questions if new windows will reach this goal. Get additional info here at the bottom of the article.

Without entering on deep technical data (Which can be found at ) here will mentioned that an Energy Star rated window MUST be efficient enough, to be airtight, and its glass panes, most be constructed in a manner that reflect sun, heat and UV Rays. So you will not need that much energy to be comfy at home: > WARNING: So many people states that they almost never use their HVAC but KEEP fans and ceiling fans running 24/7 Be careful, these are smallest and less efficient systems to cool your home...rather than your HVAC, and this energy is not free!)

Energy efficient windows are Rated by mainly these factors:

U-Rate or U-factor. Means coefficient of heat transmission, a measure of the rate of non-solar heat loss or gain through a material or assembly. U-values gauge how well a material allows heat to pass through. U-value ratings generally fall between 0.20 and 1.20. The lower the U-value, the greater a product's resistance to heat flow and the better its insulating value. The inverse of (one divided by) the U-value is R-value

R-value is simply how resistant a material (A window in this case) is to avoid the pass og the heat through.

Solar Heat Gain Coefficient (SHGC)

Putting simple words these measure how much heat your room gains from solar radiation admitted through a window, either directly transmitted and absorbed and subsequently released inward. It rates between 0 and 1. The lower a window's solar heat gain coefficient, the less solar heat it transmits. Inside your building.

Visible Transmittance (VT)

This measure the visible light from the sun in your room. Measure varies between 0 and 1, most values among double and triple pane windows are between 0.30 and 0.70. It is not known to have a whole 1 in this factor, would be like having 100% and is not likely to happen. However, the more light is transmitted, the better, this is desirable to maximize daylight; so you don/t have to use electric light during the day.

Air Leakage (AL)

Heat loss and gain occur by interchange of air from inside/outside of your home. Infiltration through cracks in the window's assembly. These rating (AL) is measured by cubic feet of air passing through a square foot of window area in a given time. Airtight is never 100% on movable windows. New windows should have rates of 0.30 or less (cfm/sq ft=cubic feet per minute, per square foot of window). Just know that high quality windows tend to be way higher than these standards, in each sense, your investment will pay.

Not considering the enhance, the comfort and curb appeal, your new windows are maybe the best upgrade you can make to the exterior on your home. Consider that, aluminum framed windows just like the single pane windows; are something you will need to replace today or in the feature.


Energy efficient window films will be a temporary solution in most cases. Still if you are in a budget and have nice and sound windows; you may add a quality energy efficient film and protect your home while saving energy. No doubt. Even on older windows, you will improve the performance.

Energy efficient vinyl windows now are available in colors and textures even wood-like; to satisfy the most picky people. And of course, there are windows made out of real wood, beautiful and efficient; you pay a more and they need maintenance, but it may worth.

If you are thinking about new energy efficient windows; let us know your concerns, and we will be more than glad to offer you answers from the professionals.

Kamis, 15 Juni 2017

Understanding the Commercial Retrofit Energy Efficiency Process

For most companies, energy efficiency is the most desirable practice promoted by the green movement, and it's easy to why: by replacing older, less efficient technology with efficient technology, companies can reduce their annual utility bill by over half, creating significant savings that increase their bottom line year after year. However, even with the promise of significant utility savings, some companies fail to explore commercial retrofit energy efficiency due to misconceptions about what commercial retrofit energy efficiency entails. Below, we list three common reasons why companies needlessly avoid implementing energy efficient retrofits.

Reason 1: The Project Will be Too Expensive

While there's no denying that most energy-efficiency projects are expensive in terms of total cost, paying for them is no longer the financial burden that it was. Until recently, companies needed enough investment capital to pay for the majority of a project upfront. But today, energy-efficiency providers offer long-term, interest-free financing that allows companies to pay a minimal amount of a project's cost upfront and then use the utility savings that the project generates to pay on its balance. Considering that most energy efficiency projects have a first-year ROI of 50 percent or higher, most projects are paid for within two years.

Reason 2: A Company Already has "Efficient" Equipment

Trusting that a building's interior lighting system, HVAC components, and other machinery are energy efficient because a manufacturer claims that they are is like trusting that a cleaning solution is organic because it contains the word "natural" on its label. When a product claims to be efficient, it's important to question what standard of efficiency it refers to. For example, fluorescent T12 lighting is efficient compared to incandescent lighting. However, when compared to fluorescent T8 lighting, it's rather inefficient. To determine whether its facility is truly energy-efficient, a company should have an energy-efficient consultant perform a building wide energy audit.

Reason 3: The Project Will be Too Invasive

Depending on a company's line of work, its desire to avoid inner building construction at all costs is understandable. However, some companies mistakenly think that the retrofitting process is as invasive as the traditional construction process. Unlike installing an entirely new lighting system or HVAC system, retrofitting these systems for energy efficiency involves replacing their energy using elements with more efficient elements. For example, the efficiency of an air distribution system can be significantly improved by downsizing it oversized distribution fans, and the efficiency of an interior lighting system can be greatly improved by implementing new lamps and ballasts.