How Window Replacement Can Improve Energy Efficiency at Home

Table of Contents
Update or Replace Windows | Department of Energy

Key Takeaways 

  • Energy-efficient windows can reduce home heat loss by as much as 30% and save on energy bills. 
  • Modern technologies such as Low-E glass and multiple panes offer an even greater amount of insulation. 
  • Tax credits and incentives may reduce the overall cost of new windows. 

The easiest way to increase a home’s energy efficiency is commonly through windows. Old and inefficient windows are one of the biggest culprits of energy loss, causing your HVAC system to expend 15%-30% more energy, thereby increasing utility costs. By investing in modern, high-quality windows, one can feel more comfortable indoors while also decreasing a significant expense that occurs each month. Homeowners seeking professional window installation or upgrades might consider a trusted name in the business, such as Renewal by Andersen Boulder, for a local company that can provide support and advice.  

Energy-efficient windows utilize advanced technologies, such as low-emissivity (Low-E) coatings, insulated frames, and multi-pane glazing, to minimize heat transfer, increase comfort indoors, and minimize dependence on heating and cooling systems. Ultimately, energy-efficient windows are proven to lower energy costs because inefficient windows can use up to 30% of energy in a single-family home for heating and cooling. They may also qualify for financial incentives, as some governments offer tax credits that help defray the cost of window replacement. 

Benefits of Replacing Old Windows

Replacing old, drafty windows has many benefits for homeowners, which extend beyond just energy savings. Homeowners can expect the following: 

  • Reduced Utility Bills – Improved insulation translates into instant savings, as an HVAC system does not have to work as hard to maintain comfort.
  • Enhanced Comfort: No more cold drafts during the winter and overly warm rooms during summer, thanks to modern window construction. 
  • Noise Reduction: In addition, multi-pane windows can help block outside sounds, leading to a quieter home.
  • Increased Home Value: Energy improvements such as new windows are very appealing to buyers, and can significantly increase the resale value of your home.

Important Aspects of Energy-Efficient Windows

When examining options for replacement windows, look for features that help to maximize the energy efficiency of the new windows:

  • Low-E Glass: A microscopically thin coating that reflects infrared heat while allowing the visible light to pass through. It helps maintain warmth in interior spaces during winter and keeps them cooler during summer.
  • Multiple Panes: Double or even triple-pane windows capture more air or inert gases between the layers. Multiple panes can limit energy losses to a level that single-paned ones can’t even come close to.
  • Gas Fill: Wherever possible, argon and/or krypton gases are pumped between the window layers to improve thermal insulation performance, as they provide better performance than completely air filled options.
  • Insulated Frames: Certain materials—like vinyl, fiberglass, and composite—are less conductive than aluminum and keep the transfer of heat or cold minimized as well.

When these features work together, they will provide you with excellent performance that can be customized for the unique climate where the home is located. Also, a helpful source of unbiased consumer information when looking to compare window products is the Consumer Reports window buying guide.

Financial Benefits and Incentives

The financial benefits of removing windows for high-efficiency windows go beyond monthly energy savings. Apart from monthly savings, thanks to legislation like the Inflation Reduction Act, which includes individual tax credits available to homeowners performing qualifying energy-efficient improvements to their home (including windows, lumber, etc.) that results in upwards of a 30% federal tax credit for qualifying improvements, homeowners could end up saving hundreds of dollars on top of other tax savings before you factor in any long-term energy cost relief on your monthly utility bill. Additionally, multiple state and/or local utility programs should also have rebate or incentive programs that could make replacing your windows more affordable. For further information, it is wise to check reputable websites, like Kiplinger’s Tax Credits for Energy Efficiencies.

Selecting the Right Windows for Your Home

Although new windows will need to be selected based on the climate of the region your residence is located in, you will also need to consider the architecture/style of your home, while managing your budget. ENERGY STAR certified means windows have received 3rd third-party certification stipulating that if the window is certified it would meet performance criteria through your climate zone. Make sure to understand the U-factor and the solar heat gain coefficient (SHGC) specs for any windows you are interested in prior to comparing with the National Fenestration Rating Council (NFRC) for further information, along with checking with the local area experts for available options that fit your values and needs while increasing potential energy cost savings.

Installation and Maintenance

The most advanced window will not perform at the standard intended if the window is not properly installed. Selecting a qualified and certified installer will be critical; finding a handyman, uncle, or neighbor may not yield the best results. A qualified installer will have experience working with the windows and brand you choose. Proper weatherproofing and sealing of finished windows will help avoid air leaks and water issues. After installation, a maintenance schedule would include cleaning glass, checking weather stripping, and winterizing or inspecting caulk after each season. Following a schedule will help ensure those new windows remain performing at each respective window expectations for the duration of the investment.

Real Life Energy Savings

The homeowner and their feedback have clearly expressed a high level of satisfaction after replacing their windows. This Old House also did a survey using the State of Our Home survey series of over 1,100 homeowners across the United States. Around 67% of those homeowners agreed that after replacing windows they have lower energy bills, and based on the size and/or location of their home’s the range was typically $10-$50 in monthly utility bills based on their home size and location. Each number in this survey can speak for itself in cumulative savings and each energy efficiency savings should be noted. The individual window performance for its own advanced window technology and thermodynamics can target values that daily budgeting can hit every family has to work with, and lifestyle.

Conclusion

Replacing older windows is a proven, predictable solution option for increasing ease, comfort, home-market rebuttal, continued potential energy efficiency, for home efficiency savings. By learn the particulars feature set, and financial benefits of high-efficiency windows, you can better position yourself and your family for this option geared to assist you in lowering your energy & utility costs, and alternative expenses now, and in the future.

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