Save More. Stay
Comfortable. Choose
ENERGY STAR in GEM Windows & Doors.
Discover Canada’s Most Trusted Energy-Efficient Solutions for Homes & Businesses
Looking to lower energy bills and make your space more comfortable year-round? At GEM Windows & Doors, we specialize in ENERGY STAR-rated windows and doors designed to meet and exceed Canada’s highest energy efficiency standards. Whether you're building new or upgrading, our wide range of ENERGY STAR windows in Canada offers the perfect combination of style, performance, and long-term savings.
Why ENERGY STAR Matters to Windows and Doors
Choosing ENERGY STAR-certified products provides better insulation, lower energy bills, and improved comfort all year round. In both homes and commercial spaces, ENERGY STAR windows and doors help reduce heat loss, manage indoor temperatures, and contribute to long-term energy savings.
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Better insulation for a more comfortable indoor climate
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Lower utility costs through reduced heating and cooling needs
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Environmentally friendly choices that reduce carbon footprint
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Increased property value through performance and curb appeal
Looking for ENERGY STAR in vinyl windows, entry doors, or ENERGY STAR in patio doors? We’ve got you covered with a full range of products suited for Canada’s climate.
How important is an ENERGY STAR rating?
The ENERGY STAR-rating on windows and doors is a quick way to make better purchasing decisions. Products with this rating meet strict energy efficiency guidelines and have been third-party tested for performance. Choosing ENERGY STAR-rated doors and windows means greater comfort, lower energy bills, and added value for your home.
Not All Energy Ratings Are Equal —Here’s What to Look For
At GEM, we can help you make sense of ENERGY STAR window ratings in Canada so you can choose with confidence. From U-Factor/Value to Solar Heat Gain (SHGC), we explain what matters for your climate zone and guide you toward the best-performing products, whether you're upgrading a single window or your entire space. Our team will guide you through:
Understanding ENERGY STAR requirements
Finding products from the ENERGY STAR Most Efficient Windows Canada list
Choosing from ENERGY STAR aluminum and vinyl windows, sliding patio doors, and more
Comparing ENERGY STAR door ratings and window ratings that meet your goals
Want to know how important ENERGY STAR-ratings are for your project? Visit our showroom and speak to a knowledgeable team member—we’ll break it all down.
Trusted by Canadians Since 1961
We’re not just another window and door company—we’re Toronto’s oldest and most trusted, proudly serving the GTA since 1961. GEM combines decades of experience with a customer-first approach, offering expert advice and dependable service every step of the way.
Family-owned and
operated since 1961
Massive 5,000 sq ft showroom with live
product demos
Tailored design and product solutions—no “one-size-fits-all”
Energy-efficient options from ENERGY STAR Canada in windows and doors
Unmatched customer service from first call to final install
What Makes GEM Different?
Commitment to Craftsmanship
Our expert installation crews—many with 20+ years at GEM—deliver precise and professional installations. We don’t cut corners, overbook, or rush.
People-First Service
From your first showroom visit to final inspection, our team is here to guide, educate, and support. GEM offers customized energy-efficient solutions based on your space, budget, and vision.
Endless Options
From ENERGY STAR-rated exterior doors to ENERGY STAR sliding patio doors, we help you find the best match for your lifestyle and goals.
Energy Star FAQs
