Mighty Max Hydronic Boiler
Page 11
Category I
Vertical Venting
with Ducted
Combustion Air
Horizontal Venting
Any Vent Which Does Not Meet
Category I Combustion Air
Through Louvers
Horizontal Venting
Ducted Combustion Air
(Certified As Direct Vent)
Non-Category I
Exhaust Terminal Detail
Side View
Wall
Figure 8. Venting and Combustion Air Options.
Vertical Venting (Category I)
Combustion Air In
Through Louvers
Side View
Wall
NOTE: All views are shown
from rear of heater
Horizontal
Intake Terminal Detail
(Combustion Air)
Screen Provided
On Vertical Intake
Air Terminal
For vertically ducted combustion air:
• Combustion air intake must
terminate at least 3 feet (0.91m)
lower than vent termination, if it is
located within a 10 foot (3.05m)
radius.
• Combustion air intake must be at
least 1 foot (0.3m) above roof top
and normal snow levels.
