Purchasing Toolkit - The Tools You Need
ENERGY STAR® – Windows‚ Doors and Skylights
The elements specified for ENERGY STAR qualified windows doors and skylights apply to Canada only. In addition‚ the levels have been developed primarily for products that are installed in buildings of three or fewer stories and used for residential or light commercial purposes.
Definitions
- Window
- An assembly that transfers visible light and is designed to be secured in a vertical position within a wall structure in a building envelope.
- Skylight
- An assembly that transfers visible light and is designed to be secured in a sloped position within a roof structure in a building envelope.
- Door
- An assembly that may or may not transfer visible light and is designed to be secured in a vertical position within a wall structure in a building envelope. The primary function of the assembly is to allow human egress. A sliding glass door opens in plane with the wall and has a glazed area more than 75 percent of the total assembly in size.
CSA – Canadian Standards Association
CGSB – Canadian General Standards Board
NFRC – U.S. National Fenestration Rating Council
Test Standards
Thermal
CSA A440.2 Energy Performance of Windows and Other Fenestration Systems
CSA A453.0 Energy Performance Evaluation of Swinging Doors (Note: the Energy Rating or ER formula from the CSA A440.2 - 04 standard must be used to calculate the ER rating for swinging doors).
NFRC 100 Procedure For Determining Fenestration Product U-factors
NFRC 200 Procedure For Determining Fenestration Product Solar Heat Gain Coefficient and Visible Transmittance at Normal Incidence
Structural (for airtightness)
CSA A440.0 Windows
CGBS 82.1 Sliding Doors
CGSB 82.5 Insulated Steel Doors
Criteria
Windows and doors may qualify for ENERGY STAR with either their U-value or Energy Rating (ER) value. If a window or door qualifies with its ER value‚ the U-value for that product may not exceed 2.00 W/m2 K. Skylights may only qualify with their U-value. Values given in Table 1 and Table 2 are for total product performance only‚ not centre-of-glass. Products may qualify for more than one zone. For windows and sliding glass doors‚ there is also a maximum air leakage rate of 1.65 (m3/h)/m (CSA A440.0/CGSB 82.1‚ Level A2) for all zones.
TABLE 1: Windows and Doors
Zone |
Heating Degree-Day Range |
U-Value Path |
or |
Energy Rating Path |
Maximum W/m2 K (Btu/h ft F) |
SHGC |
Minimum ER* (dimensionless) (Maximum U-value 2.00 W/m2 K) |
|
|
|
|
|
Windows With Sashes** and Doors |
Windows Without Sashes |
A |
<= 3500 |
2.00 (0.35) |
Any |
or |
17 |
27 |
B |
> 3500 to < = 5500 |
1.80 (0.32) |
Any |
or |
21 |
31 |
C |
> 5500 to <= 8000 |
1.60 (0.28) |
Any |
or |
25 |
35 |
D |
> 8000 |
1.40 (0.25) |
Any |
or |
29 |
39 |
*See Appendix 1 for an explanation of the 2004 ER formula. **The sash may be integral to the frame. Example: fixed casements.
TABLE 2: Skylights
Zone |
Heating Degree-Day Range |
Maximum W/m2 K (Btu/h ft F) |
SGHC |
A |
<= 3500 |
3.10 (0.54) |
Any |
B |
> 3500 to <= 5500 |
2.80 (0.50) |
Any |
C |
> 5500 to <= 8000 |
2.60 (0.46) |
Any |
D |
> 8000 |
2.38 (0.42) |
Any |
Appendix 1: Information About the New ER Formula
In the 2004 version of the CSA A440.2 standard, the ER formula underwent the following changes:
- A 20 percent solar reduction factor was added.
- A constant factor of 40 was added to make all ER numbers positive.
In addition, window sample sizes were harmonized with the U.S. NFRC standards.
As a result of the changes, the qualifying levels for ENERGY STAR had to be recalculated to match the thermal performance required by the previous version of the ER equation. Table 3 compares the ENERGY STAR zone gateway values for the 2004 version of the standard to the previous 1998 version.
Table 3: ENERGY STAR Qualifying Levels Comparison
Zone |
A440.2 – 04 |
A440.2 – 98 |
A |
17 / 27 |
-16 / -6 |
B |
21 / 31 |
-12 / -2 |
C |
25 / 35 |
-8 / +2 |
D |
29 / 39 |
-5 / +5 |
Zones
Because the climate varies widely across Canada and because windows‚ doors and skylights are part of the building envelope‚ four climate zones in Canada‚ based on an average annual temperature indicator called a heating degree-day (HDD)‚ were developed specifically for the ENERGY STAR program for windows‚ doors and skylights. A heating degree-day is the annual sum of the degrees of the average daily temperature for all days below 18°C.
This accumulated sum is then averaged over a 30-year period to provide a good indication of the average temperature in a certain location. The higher the average HDD value‚ the colder a location and the longer the heating season‚ usually with very cold winter temperatures. Zone A is the mildest region in Canada‚ and Zone D is the coldest region.
![Map of Canada](/web/20061103140551im_/http://www.oee.nrcan.gc.ca/energystar/english/gif/2005_map_nonames.jpg)
For locations that are significantly higher in elevation than the surrounding area‚ it is better to purchase a product rated for at least one zone colder than indicated on the zone map. This is especially true in southern and central British Columbia‚ where energy efficiency levels have been determined for major urban centres‚ which are normally located in valleys.
The following are heating degree-day values and ENERGY STAR qualification zones for a number of locations in Canada.
British Columbia
Location |
Heating Degree-Day Value |
Zone |
Abbotsford |
2 981 |
A |
Alert Bay |
3459 |
A |
Bella Coola |
3510 |
B |
Cape St James |
3331 |
A |
Castlegar |
3678 |
B |
Chilliwack |
2833 |
A |
Comox |
3083 |
A |
Cranbrook |
4576 |
B |
Dawson Creek |
5 981 |
C |
Dease Lake |
6 845 |
C |
Estevan Point |
3150 |
A |
Fort Nelson |
6 836 |
C |
Fort Saint John |
5 847 |
C |
Hope |
3057 |
A |
Kamloops |
3 571 |
B |
Kelowna |
3 869 |
B |
Lytton |
3 309 |
A |
Mackenzie |
5714 |
C |
Merry Island |
2 726 |
A |
Nanaimo |
3056 |
A |
Penticton |
3 431 |
A |
Port Alberni |
3173 |
A |
Port Hardy |
3 552 |
B |
Prince George |
5132 |
B |
Prince Rupert |
3 967 |
B |
Quesnel |
4742 |
B |
Revelstoke |
4 148 |
B |
Salmon Arm |
4044 |
B |
Sandspit |
3 531 |
B |
Smithers |
5135 |
B |
Stewart |
4389 |
B |
Summerland |
3525 |
B |
Terrace |
4307 |
B |
Tofino |
3236 |
A |
Vancouver |
2 927 |
A |
Vernon |
3820 |
B |
Victoria |
3 041 |
A |
Whistler |
4 287 |
B |
Williams Lake |
5 073 |
B |
Alberta
Location |
Heating Degree-Day Value |
Zone |
Banff |
5473 |
B |
Calgary |
5 108 |
B |
Camrose |
5603 |
C |
Cold Lake |
5 970 |
C |
Coronation |
5781 |
C |
Edmonton |
5 708 |
C |
Edson |
5645 |
C |
Fort Chipewyan |
7 295 |
C |
Fort McMurray |
6 346 |
C |
Grande Prairie |
5 883 |
C |
High Level |
7 036 |
C |
High River |
5194 |
B |
Jasper |
5 374 |
B |
Lethbridge |
4 599 |
B |
Lloydminster |
5892 |
C |
Medicine Hat |
4 632 |
B |
Peace River |
6 156 |
C |
Red Deer |
5 696 |
C |
Rocky Mountain House |
5 744 |
C |
Slave Lake |
5974 |
C |
Whitecourt |
5617 |
C |
Saskatchewan
Location |
Heating Degree-Day Value |
Zone |
Assiniboia |
5294 |
B |
Broadview |
5 892 |
C |
Buffalo Narrows |
6312 |
C |
Collins Bay |
8036 |
D |
Cree Lake |
7 434 |
C |
Cypress Hills |
5457 |
B |
Estevan |
5 361 |
B |
Gravelbourg |
5160 |
B |
Kindersley |
5 595 |
C |
La Ronge |
6 671 |
C |
Maple Creek |
4 755 |
B |
Meadow Lake |
6317 |
C |
Melfort |
6235 |
C |
Moose Jaw |
5276 |
B |
Moosomin |
5721 |
C |
Nipawin |
6389 |
C |
North Battleford |
5 930 |
C |
Prince Albert |
6 277 |
C |
Regina |
5 659 |
C |
Saskatoon |
5 860 |
C |
Swift Current |
5 245 |
B |
Uranium City |
7 857 |
C |
Weyburn |
5 448 |
B |
Wynyard |
5971 |
C |
Yorkton |
6066 |
C |
Manitoba
Location |
Heating Degree-Day Value |
Zone |
Brandon |
5 951 |
C |
Churchill |
9 073 |
D |
Dauphin |
5940 |
C |
Emerson |
5 514 |
C |
Flin Flon |
6 705 |
C |
Gillam |
8 107 |
D |
Gimli |
6051 |
C |
Island Lake |
7 023 |
C |
Lynn Lake |
7 794 |
C |
Norway House |
6 956 |
C |
Steinbach |
5 727 |
C |
Swan River |
6083 |
C |
The Pas |
6 598 |
C |
Thompson |
7 743 |
C |
Winnipeg |
5 785 |
C |
Ontario
Location |
Heating Degree-Day Value |
Zone |
Atikokan |
6052 |
C |
Big Trout Lake |
7 577 |
C |
Chapleau |
5989 |
C |
Cochrane |
6411 |
C |
Cornwall |
4 234 |
B |
Dryden |
5912 |
C |
Earlton |
5837 |
C |
Fort Erie |
3789 |
B |
Fort Frances |
5 637 |
C |
Geraldton |
6496 |
C |
Gore Bay |
4769 |
B |
Hagersville |
3800 |
B |
Hamilton |
4012 |
B |
Kapuskasing |
6 372 |
C |
Kenora |
5 749 |
C |
Kingston |
4 289 |
B |
Kirkland Lake |
6 048 |
C |
Lansdowne House |
7087 |
C |
London |
4 062 |
B |
Manitouwadge |
6 121 |
C |
Moosonee |
7 017 |
C |
Muskoka |
4 883 |
B |
Niagara Falls |
3 661 |
B |
North Bay |
5 295 |
B |
Ottawa |
4 600 |
B |
Petawawa |
5178 |
B |
Peterborough |
4 537 |
B |
Point Pelee |
3 565 |
B |
Red Lake |
6319 |
C |
Sarnia |
3 882 |
B |
Sault Ste. Marie |
5 052 |
B |
St Catharines |
3659 |
B |
Stratford |
4210 |
B |
Sudbury |
5 344 |
B |
Thunder Bay |
5 718 |
C |
Timmins |
6 149 |
C |
Toronto |
4 066 |
B |
Trenton |
4222 |
B |
Wawa |
5 963 |
C |
Wiarton |
4 442 |
B |
Windsor |
3 525 |
B |
Québec
Location |
Heating Degree-Day Value |
Zone |
Bagotville |
5793 |
C |
Baie-Comeau |
6 014 |
C |
Drummondville |
4621 |
B |
Granby |
4604 |
B |
Inukjuak |
9 090 |
D |
Kuujjuaq |
8 644 |
D |
Maniwaki |
5 321 |
B |
Mont-Joli |
5478 |
B |
Montréal |
4 575 |
B |
Natashquan |
6178 |
C |
Nitchequon |
8 105 |
D |
Québec |
5 202 |
B |
Rimouski |
5 217 |
B |
Roberval |
5821 |
C |
Sainte-Annedes-Monts |
5 514 |
C |
Schefferville |
8 476 |
D |
Sept-Îles |
6 277 |
C |
Sherbrooke |
5 151 |
B |
Thetford Mines |
5203 |
B |
Val-d'Or |
6 213 |
C |
New Brunswick
Location |
Heating Degree-Day Value |
Zone |
Bathurst |
5 056 |
B |
Charlo |
5469 |
B |
Frederiction |
4 751 |
B |
Kouchibouguac |
4865 |
B |
Miramichi |
4970 |
B |
Moncton |
4 806 |
B |
Saint John |
4 755 |
B |
St Leonard |
5457 |
B |
Nova Scotia
Location |
Heating Degree-Day Value |
Zone |
Halifax |
4367 |
B |
Louisbourg |
4588 |
B |
Sable Island |
3818 |
B |
Sydney |
4618 |
B |
Yarmouth |
4041 |
B |
Prince Edward Island
Location |
Heating Degree-Day Value |
Zone |
Charlottetown |
4 715 |
B |
Summerside |
4631 |
B |
Newfoundland and Labrador
Location |
Heating Degree-Day Value |
Zone |
Baie Verte |
5 612 |
C |
Churchill Falls |
7 918 |
C |
Corner Brook |
4732 |
B |
Deer Lake |
5 384 |
B |
Gander |
5 198 |
B |
Goose Bay |
6 787 |
C |
St. Anthony |
6 404 |
C |
St. John's |
4 882 |
B |
Stephenville |
4 899 |
B |
Wabush Lake |
7838 |
C |
Yukon Territory
Location |
Heating Degree-Day Value |
Zone |
Burwash Landing |
7 945 |
C |
Faro |
7334 |
C |
Mayo |
7 664 |
C |
Old Crow |
9761 |
D |
Watson Lake |
7620 |
C |
Whitehorse |
6 811 |
C |
Northwest Territories
Location |
Heating Degree-Day Value |
Zone |
Cape Parry |
10939 |
D |
Fort Liard |
7045 |
C |
Fort Reliance |
8 946 |
D |
Fort Simpson |
7 771 |
C |
Fort Smith |
7 439 |
C |
Hay River |
7 648 |
C |
Inuvik |
9 767 |
D |
Mould Bay |
12945 |
D |
Norman Wells |
8 615 |
D |
Sachs Harbour |
11442 |
D |
Tuktoyaktuk |
10 414 |
D |
Yellowknife |
8 267 |
D |
Nunavut
Location |
Heating Degree-Day Value |
Zone |
Alert |
13 115 |
D |
Baker Lake |
10 860 |
D |
Cambridge Bay |
11 818 |
D |
Clyde River |
11 218 |
D |
Coral Harbour |
10 773 |
D |
Eureka |
13 732 |
D |
Iqaluit |
10 117 |
D |
Resolute Bay |
12 526 |
D |
Sample Procurement Language for ENERGY STAR – Qualified Windows‚ Doors and Skylights
The following language is recommended for use in procurement contracts so that you receive ENERGY STAR qualified windows‚ doors and skylights . As with all purchases‚ be sure to ask the appropriate questions so that you get exactly what you want.
The vendor must
Verify that the window‚ door or skylight model has been qualified to bear the ENERGY STAR symbol by a manufacturer participating in the ENERGY STAR initiative.
Ensure that the model qualifies for the area where the product is installed (or for a colder area) according to the heating degree-days and climatic zones (A, B, C, D) as per the information in the preceding section.
For window and sliding glass doors‚ ensure that air leakage does not exceed 1.65 (m3/h)/m.
Information Resources
List of models: Windows
List of models: Sliding Glass Doors
Search options include:
- Brand name
- Product Name
- Model number
- Material and/or Style
- ENERGY STAR Zones
Original Data Source
Data supplied to NRCan (Natural Resources Canada) by participating manufacturers
List of participating manufacturers of ENERGY STAR qualified windows‚ doors or skylights.
List of participating dealers of ENERGY STAR qualified windows, doors or skylights.
Update Frequency
As required
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