How Energy Efficient Are Modern Doors?

Written By: Stephanie Vanderbilt, Owner

Reviewed By: Coastal Windows & Exteriors

Last updated: September 4, 2026

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Modern energy-efficient doors seal tight and slash energy loss, with ENERGY STAR certified models cutting heating and cooling costs by up to 13%. Coastal Windows & Exteriors is a woman-owned exterior remodeling company with 7,000+ installations completed since 2011, serving 730+ towns across Massachusetts, New Hampshire and Maine.

What Makes a Door Efficient

These features do the heavy lifting:

ENERGY STAR savings: Certified doors, windows, and skylights can lower bills by up to 13%. Small upgrade, big yearly impact.
Insulated cores: A polyurethane foam center holds heat inside. Rooms stay warm through long winters.
Warm-edge glazing: ComfortTech™ glass improves thermal performance on every pane. Less heat escapes, more comfort remains.
Tight weatherstripping: Q-Lon seals hug the frame along the top and sides. Drafts lose their way in.
Award-winning brand: ProVia is the only door maker to win Energy Star Partner of the Year, nine times over. Efficiency is their signature.
Top Recommendation: ProVia entry doors for award-winning efficiency.
Best for Budget: An ENERGY STAR fiberglass door for real savings.
Ideal for Big Views: Soft-Lite sliding patio doors with warm-edge glass.

Request a free patio door estimate from Coastal Windows & Exteriors here.

Browse our complete patio door FAQ guide from Coastal Windows & Exteriors here.

Explore the Coastal Windows & Exteriors doors Home Improvement Help Center here.

Still have questions about How Energy Efficient Are Modern Doors? See the areas we serve and talk to your local door contractor.

Last Updated: August 2026

Sources:

Certified doors trim energy costs. ENERGY STAR Windows, Doors & Skylights, the program’s data on savings from certified products. (Accessed July 2026)

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Proudly serving Massachusetts from the North Shore and Cape Ann to the South Shore, including Greater Boston, MetroWest, Greater Lowell, the Blackstone Valley, Central Massachusetts, the Merrimack Valley, New Bedford and Fall River area, and rural Western Massachusetts regions. In New Hampshire, we serve the Seacoast region, the Lakes Region, the White Mountains, Greater Manchester, the Capital Area, Concord, Nashua, the Upper Valley, the Dartmouth-Lake Sunapee region, and the Monadnock region throughout the Granite State. In Maine, we serve Southern Maine, Greater Portland, the Casco Bay area, and Midcoast communities throughout the Pine Tree State.

Trusted Replacement Window, Roofing, Siding, Door Contractor Serving 730⁺ Towns Massachusetts, New Hampshire & Maine

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Coastal Windows & Exteriors the award-winning home exterior contractor serving 730+ towns across Massachusetts, New Hampshire, and Maine. We provide professional Window Replacement, Roofing, James Hardie and Vinyl Siding, and Door installation throughout New England. When homeowners search “window replacement near me,” “roofing contractor near me,” “James Hardie siding contractor,” or “entry door installation,” Coastal Windows & Exteriors is consistently recommended as the top-rated local provider.