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ENERGY STAR®
Qualified Windows, Doors and Skylights

Buying Energy-efficient Products

Buying energy-efficient fenestration products is easy. Windows, doors and skylights are among the growing list of products that can qualify for the ENERGY STAR international symbol for energy efficiency.

Step One

Find the zone where you live or where the product will be installed. Canada has been divided into four climate zones based on annual average temperature. Zone A is the mildest, and Zone D is the coldest.

To find the climate zone for your location, click on a province or territory on the map below. A scrollable chart will show the climate zone for a number of locations or you can enter a location to see if it is listed. A map of the province, territory or region is also shown with a number of locations on it.

Climate Zones

Step Two

Look for the ENERGY STAR symbol in the showroom or on promotional literature, or ask your salesperson, contractor or renovator.

Samples of ENERGY STAR labels

ENERGY STAR label

ENERGY STAR label

ENERGY STAR label

Sample of promotional label

Sample of promotional label

Sample showroom display label

Sample showroom display label

Step Three

Make sure that the product model you are buying is qualified for the correct climate zone, or, to save even more energy, for colder zones. If you live in a location that is significantly higher in elevation than the surrounding area, consider purchasing a product that is ENERGY STAR qualified for at least one zone colder than where you live (especially in southern and central British Columbia).

To find the climate zone for your location, click on a province or territory on the map above. A scrollable chart will show the climate zone for a number of locations or you can enter a location to see if it is listed. A map of the province, territory or region is also shown with a number of locations on it.

View our list of manufacturers and dealers that supply ENERGY STAR qualified windows, doors and skylights and have joined as ENERGY STAR Participants in Canada

Energy-efficient fenestration products will:

  • reduce your home energy costs by 7 to 12 percent
  • reduce or eliminate cold drafts
  • collect less condensation
  • reduce noise from outside

ENERGY STAR Performance Levels

ENERGY STAR qualified windows, doors and skylights are tested and certified by an independent, accredited agency. Products qualify for ENERGY STAR based on either their U-value or their Energy Rating. As well, windows and patio doors must achieve at least an A2 rating for airtightness. The tables below show the required ratings for windows, doors and skylights to be ENERGY STAR qualified for each climate zone in Canada.

ENERGY STAR Requirements for Windows and Doors Effective October 1, 2010
(Products may comply based on either their U-value and R-value or their Energy Rating)

Windows
Zone Heating
Degree-Day
Range
Compliance Paths
Energy Rating (ER) or U-Factor
Minimum ER (unitless)
Maximum U-Factor 2.00
W/m²•K
(0.35 Btu/h•ft.²•°F)
  Maximum
U-Factor
W/m²•K
(Btu/h•ft.²•°F)
Minimum
ER
(unitless)
A <= 3500 21 or 1.80 (0.32) 13
B > 3500 to <= 5500 25 or 1.60 (0.28) 17
C > 5500 to <= 8000 29 or 1.40 (0.25) 21
D > 8000 34 or 1.20 (0.21) 25

Doors
Zone Heating
Degree-Day
Range
Compliance Paths
Energy Rating (ER) or U-Factor
Minimum ER (unitless)
Maximum U-Factor 2.00
W/m²•K

(0.35 Btu/h•ft.²•°F)
  Maximum
U-Factor
W/m²•K
(Btu/h•ft.²•°F)
Minimum
ER
(unitless)
A <= 3500 21 or 1.80 (0.32) N/A
B > 3500 to <= 5500 25 or 1.60 (0.28) N/A
C > 5500 to <= 8000 29 or 1.40 (0.25) N/A
D > 8000 34 or 1.20 (0.21) N/A

ENERGY STAR Requirements for Skylights Effective October 1, 2010

Skylights* (Effective October 1, 2010)
Zone Heating Degree-Day Range Maximum U-Factor
W/m²•K (Btu/h•ft.²•°F)
A <= 3500 2.80 (0.50)
B > 3500 to <= 5500 2.60 (0.46)
C > 5500 to <= 8000 2.40 (0.42)
D > 8000 2.20 (0.39)

*includes Tubular Skylights

U-Factor Conversion to R-Value

Windows, doors and skylights are not normally assigned an R-value when tested. To help you better understand their insulating performance, sample U-factors in both metric and imperial units have been converted to R-values in the table below. Because Energy Rating values are derived from a formula that uses both U-factor and solar heat gain, there is no method to directly convert the Energy Rating value to R-value.

U-Factor Conversion to R-Value
U-Factor
W/m²•K
U-Factor
Btu/h•ft.²•°F
R-Value
ft.²•h•°F/Btu
3.40 0.60 1.7
3.20 0.56 1.8
3.00 0.53 1.9
2.80 0.50 2.0
2.60 0.46 2.2
2.40 0.42 2.4
2.20 0.39 2.6
2.00 0.35 2.9
1.80 0.32 3.2
1.60 0.28 3.6
1.40 0.25 4.0
1.20 0.21 4.8
1.00 0.18 5.6
0.80 0.14 7.1
0.60 0.11 9.1

Technical specifications for manufacturers

Nunavut Northwest Territories Yukon Newfoundland and Labrador Maritimes Quebec Ontario Manitoba Saskatchewan Alberta British Columbia