Manufacturer Profile
Mason
View all NRCan-certified window series and their energy efficiency metrics.
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Product Series
40.8
Avg ER Score
Certified Product Series
MAS-V3000
Vinyl
Top Variants by Energy Rating
#NR6670-4...
U-Factor: 1.08ER: 43
#NR6670-4...
U-Factor: 1.31ER: 43
#NR6670-4...
U-Factor: 1.08ER: 43