Manufacturer Profile
Open Windows Inc.
View all NRCan-certified window series and their energy efficiency metrics.
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Product Series
37.4
Avg ER Score
Certified Product Series
OW-SYG
Vinyl
Top Variants by Energy Rating
#NR9512-3...
U-Factor: 0.89ER: 41
#NR9512-3...
U-Factor: 0.94ER: 38
#NR001408...
U-Factor: 0.88ER: 37
OW-GEN
Vinyl
Top Variants by Energy Rating
#NR9512-3...
U-Factor: 0.8ER: 44
#NR001408...
U-Factor: 0.83ER: 42
#NR001408...
U-Factor: 0.83ER: 42
OW-ML8
Aluminum
Top Variants by Energy Rating
#NR001408...
U-Factor: 1.12ER: 43
#NR9512-3...
U-Factor: 0.95ER: 42
#NR9512-3...
U-Factor: 0.91ER: 42
FIX-UN(4,E=0.037)
Vinyl
Top Variants by Energy Rating
#NR9512-1...
U-Factor: 1.08ER: 38
#NR9512-1...
U-Factor: 1.35ER: 35
#NR9512-1...
U-Factor: 1.32ER: 35
TT-UN(4,E=0.037)
Vinyl
Top Variants by Energy Rating
#NR9512-1...
U-Factor: 1.17ER: 33
FIX-4S(4,E=0.037)
Vinyl
Top Variants by Energy Rating
#NR9512-1...
U-Factor: 1.08ER: 33
TT-4S(4,E=0.037)
Vinyl
Top Variants by Energy Rating
#NR9512-1...
U-Factor: 1.17ER: 28
NLPIC-UN(4,E=0.037)
Vinyl
Top Variants by Energy Rating
#NR9512-1...
U-Factor: 1.33ER: 36