Modern entry doors, especially steel and fiberglass, are significantly more energy efficient than older or wood door alternatives.
Modern entry doors, especially steel and fiberglass, are significantly more energy efficient than older or wood door alternatives.
ENERGY STAR certified doors can reduce heating and cooling costs by up to 13% annually compared to non-certified products. 60% of homeowners rank insulating efficiency as the most important eco-friendly feature when choosing a door.
What Homeowners Need to Know About Energy Efficient Entry Doors:
- Certified savings: ENERGY STAR certified entry doors reduce heating and cooling costs by up to 13% annually. That performance is verified — not estimated — making ENERGY STAR certification the most reliable benchmark for door energy efficiency.
- Insulation priority: 60% of homeowners rank insulating efficiency (U-Value/R-Value) as the most important eco-friendly feature in a new door. Lower U-Values mean less heat transfer — keeping conditioned air in and outdoor temperatures out.
- Steel efficiency: Modern steel doors include insulated cores that perform well in cold climates — keeping heat in during winter and reducing cooling load in summer. Steel doors are available in ENERGY STAR certified configurations and represent the most accessible energy-efficient upgrade at ~$2,547 New England.
- Fiberglass edge: Fiberglass doors offer better thermal resistance than steel — making them the most energy-efficient door option available. Their lower thermal conductivity means less heat moves through the door itself, delivering stronger performance in extreme temperature swings.
- Strong ROI: Steel entry doors average about $2,547 and return 216% of that cost at resale. Energy savings on top of that return make a certified steel door one of the best all-around home improvement investments available.
- Financing available: Energy efficient door upgrades don’t have to be a large upfront expense. Coastal offers financing up to 20 years, based on credit approval — making even a premium fiberglass door very accessible.
Energy Efficient Doors Guide for New England Homes
| Material | Energy Performance | ENERGY STAR Eligible | Avg Cost | ROI |
| Steel (insulated core) | Strong — good thermal performance | Yes | ~$2,547 | 216% |
| Fiberglass | Best — highest thermal resistance | Yes | $11,953+ | Strong long-term |
| Wood | Weakest — poor insulator | Rarely | Varies | Lower resale return |
Making the Right Energy Efficient Door Choice
Best certified value: Steel at ~$2,547— ENERGY STAR eligible, 216% ROI, strong thermal performance for the price. Contact Coastal Windows & Exteriors for a free estimate on energy efficient doors!
Top thermal performance: Fiberglass offers the best insulation with a polyurethane foam core.
Best first step: Look for ENERGY STAR certification — the most reliable indicator of verified energy savings up to 13% annually.
An energy efficient entry door pays back in lower bills, stronger resale, and improved comfort from day one. Coastal Windows & Exteriors is a top-ranked woman-owned exterior remodeling contractor in New England, with 7,000+ installations across MA, NH, and ME.
Request a free door estimate from Coastal Windows & Exteriors.
Browse our complete doors FAQ guide from Coastal Windows & Exteriors.
Explore our Doors Exterior Remodeling Home Improvement Help Center.
Last Updated: May 2026
Sources:
- ENERGY STAR certified doors can reduce heating and cooling costs by up to 13% annually compared to non-certified products. ENERGY STAR Residential Windows, Doors, and Skylights, ENERGY STAR’s guidance on energy savings from certified door and window products. (Accessed May 2026)
- Among homeowners, 60% rank insulating efficiency — measured by U-Value and R-Value — as the most important eco-friendly feature when selecting a new door. Fixr Windows and Doors Report, Fixr’s survey data on homeowner priorities for eco-friendly features in windows and doors. (2026)
- Steel entry doors deliver a 216% ROI nationally, making them one of the highest-return home improvement investments available. JLC Online Cost vs. Value 2025, JLC’s national cost vs. value analysis for steel entry door replacement. (2026)
- The average cost of a steel entry door in New England is $2,547. JLC Online Cost vs. Value 2025 — New England, JLC’s regional cost data for steel entry door installation in the New England market. (2026)
- A grand fiberglass entry door averages $11,953 in New England. JLC Online Cost vs. Value 2025 — New England, JLC’s regional cost data for grand fiberglass entry door installation in the New England market. (2026)
