Harman®  •  P-Series Installation Manual_R18  •  2014 - ___  •  06/1818 3-90-436168i
Outside air ex 
pipe goes here.
Outside Air:
Hearth & Home Technologies recommend attaching 
outside air in all installations, especially lower level and 
main oor locations.
Per national building codes, consideration must be given to 
combustion air supply to all combustion appliances. Failure 
to supply adequate combustion air for all appliance demands, 
may lead to back-drafting of those and other appliances. 
When the appliance is side-wall vented: The air intake is best 
located on the same exterior wall as the exhaust vent outlet 
and located lower on the wall than the exhaust vent outlet.
When the appliance is roof vented: The air intake is best 
located on the exterior wall oriented towards the prevailing 
wind direction during the heating season.
The outside air connection will supply the demands of the 
pellet appliance, but consideration must be given to the 
total house demand. House demand may consume some 
air needed for the stove, especially during a power failure. It 
may be necessary to add additional ventilation to the space in 
which the pellet appliance is located. Consult with your local 
HVAC professional to determine the ventilation demands for 
your house. 
Toinstalloutsideairuse3".non-combustibleexpipeFigure
4.13. There is a break-away hole on the rear panel of the 
P-Series stove which must be removed before connecting 
theexpipe.Figure4.12.Thepipeshouldberunoutsideand
terminatetothesideorbelowtheventpipeoutletsotheue
outlet is more than 12" from the inlet cover. The Termination 
Cap should be used to keep birds, rodents, etc. out of the 
pipe Figure 4.13.
You may choose to use the optional Direct Vent Wall Pass-
through Kit which incorporates the venting pass-through and 
outside air inlet into one component. Figure 4.14.
Use silicone to create an effective vapor barrier at the 
location where the chimney or outside air ducting passes 
through to the exterior of the structure.
Direct Vent Wall Pass-through Kit 
(Part #1-00-677177)
D. Outside Air
Figure 4.12
Figure 4.14
Termination Cap 
part# 1-10-09542
Figure 4.13