5.3.2
service clearances to the boiler
Top of boiler
Back of boiler
Front of boiler
Left side of boiler
Right side of boiler
Floor / Ground to
bottom of boiler
Floor/ Ground to
bottom Low loss
header
Vent
clearances to the boiler
For closet installation: clearance is 1" / 25mm from the front.
Low Loss Header
Clearances to combustible and non-combustible is 0 inch for sides, top, front and floor/ground
The recommended service clearance to the bottom of the low loss header is 12 inches.
16
Clearences from the boiler
ceiling
Min. 10" /
250mm
15.7"
24"
400
600
Minimum required clearances
to combustibles
All types
inch / mm
2" / 50
0"
6" / 150
2" / 50
2" / 50
12" / 300
0"
0"
2"
50
Minimum required clearances
to non-combustibles
All types
inch / mm
2" / 50
0"
6" / 150
2" / 50
2" / 50
12" / 300
0"
0"
2"
50
figure 6
Recommended
service clearances
All types
inch / mm
10" / 250
0
24" / 600
2" / 50
2" / 50
30" / 762
12" / 300
0"
table 3