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Energy Efficient Double Glazed Windows

Double Glazing Windows Can Save You Money!

When you fit Energy Efficient Windows to your home you can seriously save money on your energy bills. It is estimated by the Energy Saving Trust that households can save between £130-£150 when windows are fitted with energy efficient technology.

By reducing heat loss when you fit double glazing the environment also benefits, important for those concerned about the carbon footprint that our modern lives cause. Standard windows, which are usually single pane, have been shown in tests that they are very inefficient in keeping heat contained in the home.

Choosing the right window for your home is vital to making your home as energy efficient as possible. It is important to make an informed choice when buying energy efficient windows and you should always look for the Energy Saving Recommended logo. This means that the window and pane has been tested to ensure it is as energy efficient as possible.

Energy Saving Windows - Key Factors

When you decide to fit new windows to you home there are 3 components, which are vital to take in to consideration. The window frame material, the Energy Saving Window glass rating, and the way the window operates are key to ensuring your windows are as efficient as possible.

The Window Frame

The material you choose to fit your energy efficient double glazing with plays a key part in how energy efficient they are. Each material has pros and cons which may suit your household needs.

Metal or Aluminum Frames

Advantages of metal or aluminum frames are that they are very strong, not as heavy as other materials and do not require high maintenance. A disadvantage is that they are not so good at providing insulation.

Composite Frames

Composite window frames are made of composite wood products. These frames have better stability and thermal insulation properties than wood, and last longer as they are more durable.

Fiberglass Frames

Fiberglass window frames offer high insulation properties when the air cavities with the frame are filled with insulation. Fiberglass provides a strong structure for the window frame and result in high energy efficiency for windows.

Vinyl Frames

Vinyl windows are often made with polyvinyl chloride (PVC). Advantages of PVC is that in the frames do not require painting, have good energy efficiency with good insulation. Unfortunately in extreme weather conditions PVC can warp in heat and crack in the cold.

Similar to Fiberglass, vinyl frames can be filled with insulation to increase energy efficicency. These well insulating frames are often used with double glazing and high energy efficiency rating windows.

Wood Frames

Wood frames can perform well when it comes to energy efficient windows. A disadvantage is however that they also can be affected by changes in the weather. They also are heavy and take up more space reducing light in to the room, as well as needing the most work to maintain.

Window Glazing

The type glazing also makes a big difference to your energy efficient windows. By choosing the right glazing or glass for your home you drastically improve your energy efficiency windows. Gas fills involve filling the space between the double glazed windows with gas. This improves insulation and improves the thermal insulation provided by the energy efficient windows. Heat absorbing or Tinted energy efficient windows are used to soak up incoming heat from the sun through windows.

Double Glazed Windows use 2 or more panes of glass to insulate the window. The air that is trapped between the panes of glass resists heat flow and increases the energy efficiency of the window. Energy Efficient Windows can also be coated with a Low-emissivity or Low-E coating. These windows can be slightly more expensive but this is more than compensated by the 30%-50% reduction of energy loss this provides through the energy efficient windows.

Reflective coatings are often used in hot climates as they are effective in reflecting light, but do not have such effective thermal reflecting properties.

How does the Window Operating Type Affect Energy Efficiency?

The way your windows open can also affect the amount of heat loss throw the windows in your household. Air is leaked through certain types of windows more so than in others, reducing the energy efficiency. Awning which open at the top, and Casement which open at the side and outwards both have low air leakage levels due to the window closing and pressing against the frame. Hopper which opens inwardly also have low air leakage rates due to the window pressing against the frame also. These window operating types are effective in increasing the energy efficiency of your household.

Energy Saving Double Glazing Tips

- Energy efficient windows should always be installed professionally.
- Always get quotes from quality assured Energy Efficient Window companies vetted by the Energy Saving Trust.
- Ensure that Energy Saving Recommended windows are used, look out for the Energy Saving Recommended logo, these have been assessed by the British Fenestration Ratings Council.

By Richard Finch

Energy Efficiency Pays Best

In some parts of the Northeast, the skyrocketing cost of oil could cause residential winter heating bills to climb as high as $7,000. Oil reached $145 a barrel in late May, and many analysts are predicting $150-200 per barrel oil within two years. With heating oil averaging $4.71 a gallon, natural gas rates headed for a 20 to 30 percent rise. Add that to electricity bills up, some municipalities are shifting to four-day work weeks, and moving aggressively into renewable energy & energy efficiency.

Utah made headlines in July by becoming the first to put most state employees on a four-day week of 10-hour days. About one-third of the state's 3,000 government buildings will be closed on Fridays, with expected savings on heat and air conditioning to hit $3 million a year. Commuters will also save on gasoline. Utah's Governor Jon Huntsman said, "The reaction from the public has been very much a willingness to give this a go."

Energy efficiency is happening in all sectors. Behavior is changing rapidly in light of higher prices; SUV and light truck sales have dipped 30-60% (depending on the brand) over the last year. Small car sales are up. Total "vehicle miles traveled" dipped for the first time since 1979. Yet, in the 1970s after the oil embargo prompted conservation habits for about a decade, U.S. Americans returned to wasteful ways, as oil prices dropped, ignoring past lessons.

The difference this time is that higher prices are prompted mostly by fundamental supply and demand issues. Peak oil production is either already here, or will be sometime between 2010-2015 at the latest. When global peak oil production is reached, prices will be far higher than today's.

In order to lessen our dependence on oil, and keep our economy moving, energy efficiency is essential. This past July, U.S. Secretary of Energy Samuel Bodman met with the energy ministers from the Group of Eight (G8) industrialized countries, plus China, India and South Korea, to discuss ways to enhance global energy security while simultaneously combating global climate change. The G8, which includes Canada, Russia, France, Germany, Italy, Japan, UK and the US, established the International Partnership for Energy Efficiency Cooperation (IPEEC). It states that energy efficiency is one of the quickest, greenest and most cost-effective ways to address energy security and climate change while ensuring economic growth.

Meanwhile, financial support for the federal assistance "weatherization" program here in the US, which helps low-income families be more energy efficient, has dramatically declined. President Bush proposed eliminating the program entirely. An Energy Dept spending bill before the Senate, would provide $201 million for the fiscal year beginning in October ($40 million less than was supplied in 2007), while winter heating costs have soared. Bush, and GOP presidential candidate John McCain, and Republicans in Congress have touted drilling as the primary short-term solution to rising energy prices, despite the fact that opening offshore areas to production wouldn't lower gasoline prices until about 2030 -- if it does at all.

Currently, the average price for natural gas on the New York Mercantile Exchange (NYMEX) shows an increase of 33% this year. New Jersey customers will pay another 18% based on an increase requested by NJ Natural Gas to take effect this coming October, and another 15% or more expected next year. Between 2002 and 2007, the price of natural gas nearly doubled, according to the NJ Board of Public Utilities (BPU), with corresponding increases in the price of electricity and heating fuels in New Jersey.

To address the steadily rising prices of energy, New Jersey created an Energy Master Plan. Its primary goal is to maximize energy conservation and energy efficiency. Reducing energy consumption through conservation and efficiency is the most cost-effective way to help lower utility bills, increase reliability, and lower the state's contributions to global warming and other air pollutants. Reductions of energy use by at least 20% by 2020, as Governor Corzine has directed, would yield annual electricity savings of 20,000 GWh per year and annual heating savings of 119 trillion BTUs, and result in substantial cost savings, thereby promoting economic growth in the state.

Actions to this goal include the following:

- Redesign and enhance the State's current energy efficiency programs in all sectors of the economy to achieve desired results, while remaining cost-effective. This redesign emphasizes a whole-building approach to energy efficiency.

- Increase energy efficiency in new buildings with a statewide building code, which will make new construction at least 30% more energy efficient than buildings under current code by July 2009.

The market is willing to pay premiums for Energy Star buildings, says Stuart Brodsky, from the EPA's Energy Star program, as identified in the CoStar study. "The business case for energy efficiency is indisputable," he said. Green-built buildings have higher prices per square foot but have lower operating costs. Energy Star buildings are selling for an average of $61 more per square foot than conventional buildings. LEED buildings are selling for an average of $171 more per square foot, the study found. Operating costs are 10-20 percent lower in Energy Star-rated buildings, improving operating income significantly. The study also revealed that green buildings achieve higher rents and have higher occupancies.

New Jersey currently offers several programs in the way of incentives for energy efficiency:

Cool & Warm Advantage Programs - Cash rebates for energy efficient heating and cooling equipment (e.g., central air conditioners, heat pumps, furnaces, boilers or water heaters).
New Jersey for Energy Star - Offers rebates on ENERGY STAR clothes washers, room air conditioners and dehumidifiers.

New Jersey Energy Star Homes - Rebates for energy-efficient new home construction that target Smart Growth Areas. Energy Star Homes are at least 15% more energy efficient than conventionally built homes.

New Jersey Comfort Partners - Improves energy affordability for income-eligible households. If you qualify, a contractor will assess the energy savings opportunities and install the measures at no cost. Personalized customer energy education and counseling is also provided.

Home Performance with ENERGY STAR (HPWES), administered by New Jersey's Clean Energy Program, uses a whole house approach to energy-efficiency, lowering energy costs by up to 30 percent or more. This program covers renovations only, not new construction. Participating contractors are accredited through the Building Performance Institute (BPI), a national resource for building science technology that sets standards for assessing and improving the energy performance of homes.

Where To Start
Call in an expert that can show you the "biggest bang for your buck" when it comes to paying for energy efficiency upgrades. A specially trained and certified technician will conduct a Comprehensive Home Assessment, which has two phases.

Phase one consists of the technician taking inventory of, and reporting on, the current conditions in your home, including the following:

- Health & safety check (carbon monoxide levels, moisture, and indoor air quality problems)
- Overall comfort level (cold/hot spots, indoor air quality stuffiness/stale odors)
- Air infiltration rates
- Insulation levels
- Heating and cooling systems efficiency
- Domestic hot water system efficiency
- Major appliances
- Lighting

Certified technicians use a number of diagnostic tools during the first phase of your Comprehensive Home Assessment. Some of the tools they use are:

- Carbon Monoxide (CO) Analyzer: important health and safety tool
- Blower Door: measures the air tightness of a home and assists in identifying areas where air leakage is occurring

Phase two consists of contacting a BPI certified contractor to receive pricing on the proposed improvement work. They test carbon monoxide levels and potentially dangerous gases in the home before and after performing energy improvements. You will receive a detailed plan with recommended measures, costs and payback analysis. Many owners use home equity loans to finance the upgrades.

Low-interest financing or cash incentives are available through HPWES utilizing participating BPI accredited contractors. These financial incentives are for improvement packages of $2,500 or more. The more energy savings measures you install, the greater the incentive you will receive. A tier system breaks down the incentive level you can receive based on the comprehensiveness of work performed. (Visit http://www.njcep.com, enter "Tier" in the Search field, then select "Financial Incentives.")

Cash incentives range from $250 to $5,000. Or you can choose the low-interest financing option available to help pay for home improvements. The rates are either 5.99% or 3.99% depending on the level of upgrades you install. There are no application fees or closing costs, and the loans do not require a down payment.

To participate in this program, first you sign a contract for program-eligible work with a participating BPI accredited contractor. The program requires a copy of the contract before the work starts and provides your contractor with a Work Scope Approval form. Make sure your contractor has received approval from the program prior to starting the work. When the work is finished, your BPI contractor will perform some final testing to make sure the installation went well and that your house is safe and healthy. Then you both sign the Certificate of Completion, indicating the work has been done satisfactorily.

If you selected the cash incentive, a check will be sent to you directly. You make arrangements to pay your contractor in full under the terms of your contract. If you choose the low-interest unsecured loan, you apply for it through Energy Finance Solutions (EFS) before the work starts, to make sure you qualify. EFS offers low-interest loans ranging from $2,500 to $20,000. The process is quick. You can call EFS to find out if you pre-qualify for the loan at 1-888-264-4367 or visit http://www.energyfinancesolutions.com. Additional assistance may be available when homeowners meet certain income eligibility requirements.

By upgrading your home's energy efficiency, you'll increase your physical comfort, save energy, reduce your carbon footprint, and lower your monthly utility bills. Your house will increase its value in the marketplace. For every one dollar you save on energy, you increase the market value by $20 according to EPA studies.

Basic Things To Do On Your Own
- Fluorescent bulbs can save up to $30 per bulb
- Low-flow showerheads use just two gallons of water per minute, instead of five or six
- Change furnace/air conditioner filters regularly and unblock and clean ventilation registers
- Seal air leaks around windows with silicone caulk
- Weather-strip around doors
- Hot water heater set at 1200
- Close chimney dampers when not in use!
- Open shades during day in winter, shut at night
- Install a digital thermostat - raise the temperature for summer, lower it for winter,
- Dress for the season, even when you're indoors

By Cathy Sims