Harman P43, User Manual

10

P43 Pellet Stove

Outside air flex pipe 

goes here.

Inlet Cover part# 

1-10-08542

Flex pipe part# 

1-00-08543 (25')

Per national building codes, consideration must be 

given to combustion air supply to all combustion appli-

ances. 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 in-

take 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 con-

sume 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. 

To install outside air use 2 3/8" I.D. non-combustible 

flex pipe. There is a break-away hole on the rear panel 

of the P43 stove which must be removed before con-

necting the flex pipe. The pipe should be run outside 

and terminate to the side or below the vent pipe outlet 

so the flue outlet is more than 12" from the inlet cover. 

The maximum length run of this pipe is 15 feet. If a 

longer run is needed the size must be increased to 3". 

Inlet cover, part number 1-10-08542 should be used to 

keep birds, rodents, etc.out of the pipe.

You may choose to use the optional Direct Vent Wall 

Passthrough Kit (part #1-00-677077) which incorporates 

the venting passthrough and outside air inlet into one 

component. 

venting

Direct Vent Wall Passthrough Kit

(part #1-00-677077)

vent configurations:

To reduce probability of reverse drafting during shut-down conditions, Hearth & Home Technologies 

strongly recommends:

• Installing the pellet vent with a minimum vertical run of five feet, preferably terminating above the roof line.

• Installing the outside air intake at least four feet below the vent termination.
To prevent soot damage to exterior walls of the house and to prevent re-entry of soot or ash into the house:

• Maintain specified clearances to windows, doors, and air inlets, including air conditioners.

• Vents should not be placed below ventilated soffits. Run the vent above the roof.

• Avoid venting into alcove locations.

• Vents should not terminate under overhangs, decks or onto covered porches.

• Maintain minimum clearance of 12 inches from the vent termination to the exterior wall. If you see 

deposits developing on the wall, you may need to extend this distance to accommodate your installation 

conditions.

hearth & home technologies assumes no responsibility for, nor does the warranty extend to, 

smoke damage caused by reverse drafting of pellet appliances under shut-down or power failure 

conditions.