CLERA WINDOWS + DOORS · PATIO DOORS GUIDE

Are Patio Doors Energy Efficient?

Name: Windows and Doors
Brand: Clera Windows + Doors
Rating: 4.6 (652 reviews)

Yes — modern patio doors can be highly energy efficient, but performance varies significantly by product quality and specification. Because patio doors are predominantly glass, the glass package is the single most important factor in determining energy performance.

Key Energy Efficiency Features to Look For

Double or triple-pane glass — triple-pane provides significantly better insulation and is recommended for Canadian climates
Low-E coating — reflects infrared heat while allowing visible light to pass through — keeps heat inside in winter, outside in summer
Argon or krypton gas fill — dense inert gas between panes slows heat transfer more effectively than air alone
Insulated frame — vinyl or fibreglass with multi-chamber construction reduces thermal bridging at door edges
Weatherstripping and threshold seal — a tight continuous seal prevents air infiltration, responsible for a significant portion of heat loss

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What Certification Should I Look For?

Look for patio doors carrying the ENERGY STAR® Canada certification as a baseline quality indicator. ENERGY STAR® products are tested and certified to meet performance thresholds for specific Canadian climate zones.

Why Clera? Clera patio doors are available with triple-pane glass, Low-E coatings, and argon gas fills, and meet ENERGY STAR® certification requirements for all Canadian climate zones.