Energy-efficient windows prevent conditioned air from escaping from buildings and also reduce heat transfer in both directions. The increased insulation of these windows reduces domestic energy consumption and its benefits also include comfort and sound insulation. These windows are available in various designs and are also known commercially as energy saving windows.
How much do energy efficient windows cost?
The U.S. Department of Energy estimates that the average family can save between $125 and $465 per year by using ENERGY STAR-rated windows. However, changing your entire set of windows can be a large investment, and the installed cost of energy-efficient windows ranges from $279 to $800 per unit.
Since energy-efficient windows are expensive, an energy audit is first recommended to analyze their savings potential. Energy consultants can evaluate all available energy efficiency improvements to prioritize those with the highest return on investment.
Identify the best energy-saving building upgrades.
Benefits of Energy Efficient Windows
Using high-quality, energy-efficient windows can bring substantial benefits to both home and business owners.
1) Saving money and reducing carbon footprint
ENERGY STAR windows reduce energy bills and carbon footprints by 12% nationwide compared to non-certified products. According to the ENERGY STAR website, the following energy savings and emissions reductions can be achieved:
- When replacing single-pane windows in homes, the average annual savings is $101 to $583. Emissions are reduced by 1,006-6,205 pounds of CO2 per year, which is equivalent to 51-317 gallons of gasoline.
- When replacing double-pane clear glass windows, the average annual savings is $27 to $197. Emissions are reduced by 246-2,001 pounds of CO2 per year, the equivalent of 13-102 gallons of gasoline.
Savings may vary depending on weather conditions and the type of window being replaced.
2) Better insulation improves temperature control and comfort
ENERGY STAR certified windows help maintain a consistent, comfortable temperature in your home by eliminating hot and cold spots in rooms. Energy-efficient windows create a barrier against the cold during winter, maintaining a warm and pleasant indoor environment. During the summer, they help block outside heat, reducing air conditioning costs.
3) Protect furniture from UV rays
Energy-efficient windows have special coatings that provide protection from the sun's ultraviolet rays. This preserves objects such as rugs, carpets, wood, fabrics, pictures and furniture. ENERGY STAR window coverings act as a sunscreen for your home without a noticeable reduction in visible light. These special coatings reduce fading by up to 75%.
4) Certified Performance
All ENERGY STAR products are subject to a rigorous testing procedure and are only labeled after approval by recognized laboratories. Of course, this includes labeled windows, doors, and skylights.
5) Noise reduction
As mentioned previously, energy-efficient windows provide high insulation and airtightness. However, this also increases its acoustic insulation capacity, considerably reducing external noise.
6) Reduced maintenance needs
Energy-efficient windows require less maintenance because there is less condensation present, which reduces the chance of mold problems. Additionally, the UV-resistant coating helps eliminate water stains and dirt build-up on the exterior.
Cost: the main limitation of energy-efficient windows
The main disadvantage of energy-efficient windows is their high cost. However, savings on heating and air conditioning can offset the initial cost in four to six years. Potential savings from energy-efficient windows are smaller in areas of buildings with low use of heating and cooling equipment. A professional opinion from an energy consultant is recommended before making a purchasing decision.
Energy-efficient windows are only a good investment if they are installed correctly. Therefore, it is very important to find qualified installation technicians.
- Read reviews and interview potential installers before hiring.
- Ask for quotes and make sure the supplier handles the types of windows you need.
- Installers must offer a warranty for their work.
Window Replacement Discounts and Incentives
Replacing the windows in your home or business is a considerable investment. The good news is that there are some ways to reduce the cost of this project.
Municipal and state discounts and incentives
Discounts and incentive programs are often available through city and state governments. The Database of State Incentives for Renewable Energy and Efficiency (DSIRE) provides the list of programs available in your area just by entering your zip code. There used to be a federal tax credit for energy efficiency, but it has now expired.
Energy Audit and Incentive Programs for Utility Companies
A home energy audit or property condition assessment can help you identify areas where energy improvements, including energy-efficient windows, are possible. Some utility companies offer rebates and other types of incentives for new window installations.
Conclusion
Updating the windows in your home or business is very beneficial. Firstly, it improves energy efficiency, reducing electricity and gas bills. In some years, the initial investment is covered by monthly savings and the payback period can be even shorter if incentives are available.
Property value also increases when energy-efficient windows are incorporated, and they also reduce the carbon footprint. Homes and businesses with energy-saving windows and other efficiency measures can be considered environmentally friendly.
