Tennessee may not face the country’s coldest winters, but it does endure some of the hottest summers. As HVAC systems strain under pressure to keep homes cool, homeowners worry about their houses' energy efficiency. However, the real culprit behind those rising energy bills may not be your air conditioner but your doors, which are overlooked and quietly letting cooled air escape.
Why Energy-Efficient Doors Matter
A closed door looks secure, but the doorcase and other crevices may leak cool air in the summer and let in winter drafts. That wasted energy eventually shows up on your power bill. With energy-efficient doors, the insulated cores, tighter seals and advanced materials keep air conditioned air inside your home.
Here are other reasons why they’re good for you:
- Lower energy bills: Energy-efficient doors have a low U-factor, which helps minimize heat transfer, so your HVAC won’t have to work as hard. That translates to monthly savings on your utility costs.
- Consistent comfort: Improved insulation means fewer drafts and more stable indoor temperatures year-round, especially during Tennessee’s sweltering days.
- Noise and air quality benefits: Strong seals block outside noise and prevent dust, pollen and pollutants from entering, resulting in cleaner air indoors.
- Added curb appeal: Modern energy-efficient doors come in various styles, colors and finishes.
- Long-term value: The reduced energy costs and improved comfort are strong reasons for a higher resale value in the future.
When you replace your doors, you’re investing in your comfort today, future home value and savings in the long run. Now that you’re convinced, where can you buy the best energy-efficient doors for your home?
Where To Purchase the Best Energy-Efficient Doors
Here are the top providers for energy-saving doors in the market.
1. Renewal by Andersen
Renewal by Andersen is a top choice for homeowners seeking energy-efficient doors. The company offers a wide selection of styles, finishes and hardware that make the door feel like an original part of the home, only better.
Those who prefer glass doors but worry about heat transfer can choose High-Performance Low-E4® glass with the company’s proprietary SmartSun™ technology to block 95% of harmful UV rays. The doors are crafted from the company’s signature Fibrex® material, a composite twice as strong as vinyl and reinforced with fiberglass for lasting durability.
Having your replacement door custom-manufactured and installed by Renewal by Andersen guarantees 56% more energy efficiency than ordinary dual-pane glass
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2. Jeld-Wen
Jeld-Wen is a window and door manufacturer headquartered in North Carolina with a strong presence across North America and Europe. Since 1998, the brand has consistently emphasized energy efficiency and sustainability as an Energy Star partner.
Jeld-Wen offers a wide range of styles to suit farmhouse, modern, traditional and coastal homes. These options, inspired by emerging design trends, are perfect for your next replacement project. Their fiberglass, steel and authentic wood doors are brawny and beautiful, functional without compromising aesthetics.
While Jeld-Wen usually offers standard sizes that can be purchased in big box stores, it also provides extensive personalization through its Custom Wood Series, including designs and finishes to match your preferences.
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3. Masonite
Masonite is a Florida-based doormaker and one of the world’s leading manufacturers of interior doors and entry door systems. The company’s products come in various colors and designs, crafted from premium fiberglass that resists rotting, warping and cracking.
The company’s flagship line, the Masonite Performance Door System (MPDS), is designed with energy efficiency in mind. Its advanced 4-Point Performance Seal includes a rot-resistant frame, adaptive weatherstripping, a self-adjusting sill and reinforced corner pads — all working together to keep conditioned air inside your home.
As an ENERGY STAR® partner, Masonite ensures its doors meet strict efficiency standards, making them a reliable choice for Tennesseans looking to replace aging doors and cut energy costs.
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4. Therma-Tru
Therma-Tru has been in the homebuilding market for over 55 years and is trusted by homeowners and professionals alike. The company’s key advantage in energy efficiency is that customers in all 50 states, including Tennessee, can find products that meet Energy Star requirements specific to their state.
With thousands of styles available, you can replace an outdated door with one that matches your home’s look — or opt for a completely new design.
Therma-Tru doors are recognized for their energy efficiency thanks to thoughtful construction and high-performing materials. Each door features a solid polyurethane foam core and the glass options use factory-coated Low-E glass that reflects infrared and UV light and engineered systems with advanced weatherstripping to create a tighter seal and minimize air leakage.
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Make Your Replacement Door an Investment
The market is filled with countless options, but the best energy-efficient door for your home is one from a trusted brand. Ideally, it should be built to fit your home’s exact specifications and designed with a low U-factor to keep your spaces comfortable year-round. Swapping out your old door for a more energy-efficient option is an investment — an upgrade that adds comfort now and value to your home in the long run.