DuraVent FasNSeal W2 Double-Wall - Manual (Page 11)

11
FasNSeal Double-Wall Clearances to Combustibles
Rated Operating
temperatures
Minimum Clearance
enclosed
Clearance Unenclosed
Horizontal Vertical Horizontal Vertical
3" & 4"
300°F
400°F
480°F
3"
6"
6"
1"
1"
4"
1"
3"
3"
1"
1"
1"
5" - 24"
300°F
400°F
480°F
3"
6"
6"
1"
1"
6"
1"
3"
3"
1"
1"
3"
Rated Operating temperature of 300°F = Max Flue Gas temperature of 375°F
Rated Operating temperature of 480°F = Max Flue Gas temperature of 550°F