Replacement windows with a 0.1 CFM draft rating and a strong glass package cut heating costs most through winter, an upgrade that can ultimately save $500 a year on energy bills. Coastal Windows & Exteriors — a woman-owned exterior remodeling company with 7,000+ installations completed since 2011 across 730+ towns in Massachusetts, New Hampshire, and Maine — installs replacement windows engineered for cold climates, and with households spending roughly $600 per month on energy bills, the glass package is what makes the difference.
What Homeowners Need to Know:
- Glass package: Energy-efficient windows rely on the glass, coatings, and gas fill. Get a free estimate to compare your options.
- Bill impact: ENERGY STAR reports certified windows can trim energy bills up to 13%. Many owners ask how much heat is lost through windows.
- Heat loss: Windows are only about 8% of your exterior surface, per PNNL. Yet the right glass package lowers utility bills on drafty windows.
- Pro priorities: Fixr found thermal performance matters to 87% of windows professionals. Advanced glazing matters to 57% of them.
- Rebate paths: Check Mass Save, NHSaves, and Efficiency Maine for replacement windows rebates.
Picking Windows That Pay Off
Top Recommendation: Choose ENERGY STAR certified windows from Coastal Windows & Exteriors for cold-climate savings. Book your free estimate today.
Great for tight budgets: Start with the highest-rated glass you can afford, then add rebates.
Smart for comfort: Certified windows can trim heating and cooling bills up to 13%.
Ready to lower your heating bills before winter? Start with a free window assessment. Coastal Windows & Exteriors is a woman-owned, family-run remodeler founded in 2011, not a franchise. We hold a 4.8-star Google rating with 950+ verified reviews. Our team has completed 7,000+ installations.
Request a free windows estimate from Coastal Windows & Exteriors.
Browse our complete windows FAQ guide from Coastal Windows & Exteriors.
Explore the Coastal Windows & Exteriors Windows Exterior Remodeling Home Improvement Help Center.
Still have questions about which replacement windows help reduce heating costs before winter? See the areas we serve and talk to your local window contractor.
Last Updated: September 2026
Sources:
- Massachusetts households spend roughly $600 per month on energy bills. Boston.com Massachusetts Utilities Report, regional reporting on Massachusetts household utility costs. (2024)
- ENERGY STAR certified windows lower household energy bills by an average of up to 13% on heating and cooling costs. ENERGY STAR Residential Windows, Doors & Skylights, the EPA program’s overview of certified window energy savings. (Accessed September 2026)
- Windows typically make up about 8% of a home’s exterior surface area. PNNL How Triple-Pane Windows Stop Energy and Money Flying Out the Window, national lab research on window energy performance. (Accessed September 2026)
- Thermal performance, meaning U-factor and R-value, is a priority for 87% of windows and doors professionals. Fixr Windows and Doors Report, Fixr’s survey of windows and doors contractors and specialists. (2026)
- Advanced glazing is important or very important to 57% of contractors and industry specialists. Fixr Windows and Doors Report, Fixr’s survey of industry priorities in window design. (2026)
