Harman Stove Company XXV Installation & Operating Manual page 8

Inlet Cover part#
1-10-08542
Fig. 7
Adjustable from 4 1/" to 10 5/8" wall thickness
Fig. 8
8
XXV Pellet Stove
Outside air flex pipe
goes here.
Flex pipe part#
1-00-08543 (25')
Outdoor Half
Indoor Half
Venting
Outside air
Here are four benefits of
1. Having air introduced from outside the living area
boosts the overall thermal efficiency.
. It eliminates draft problems that can occur in tight
homes.
. It reduces the chance for smoke spillage in the
event of a power failure.
4. It allows your vent termination to be as close as
18" from windows or doors.
Outside air is optional except in mobile homes and
where building codes require. The benefit of outside
air is mainly noticed in small, very tight, houses.
To install outside air use  /8" I.D. non-
combustible flex pipe. There is a break-away hole
on the rear panel of the XXV stove which must be
removed before connecting 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 1" 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 ". Inlet cover part
number 1-10-0854 should be used to keep birds,
rodents, etc.out of the pipe unless the Harman wall
passthrough is being used.
direct Vent wall Passthrough
The Harman Direct Vent Wall Passthrough (Part
# 1-00-677077) makes installing your Harman Pel-
let Stove with outside air a lot easier. It combines
the needed wall protection for the venting, with a
source of intake air for combustion. It is made to fit
walls from 4 1/" to 10 1/8" thick with a single square
opening in the wall of 6-1/ inches.
hrV
When installing in a house with a Heat Reclaim-
ing Ventilation System (HRV) be sure the system is
balanced and is not creating a negative pressure in
the house.
outside air: