United States Stove Company 1600EF - Manual (Page 8)

8 USSC
INSTALLATION #1
With this installation, a back draft damper (optional) is in-
serted into the heat run before the plenum of the existing
furnace to prevent air from the existing furnace to blow
back into the furnace when it is not in use. When a back
damper is employed, it should be located as close to the
existing furnace plenum as practical.
CENTRAL DUCT CONNECTION
When connecting to a central duct system, avoid 90 de-
gree elbows as this will reduce air flow delivery. A duct run
in excess of 40 feet is NOT RECOMMENDED. The air flow
and heat output will be greatly decreased.
Run 10” insulated hot air duct from the outdoor furnace
through a wall or window of the structure. Then attach a
flexible hot air duct to the existing duct work. Connect the
duct with a 45 degree elbow or at an angle so the hot air
from the outdoor furnace is delivered downstream. This
will insure proper air flow into the system.
Avoid delivering hot air through an air conditioning coil as
this will cause an obstruction reducing heat output.
The following illustrations may be used as examples for
your installation.
INSTALLATION EXAMPLES
TYPES OF INSTALLATION
continued...
INSTALLATION #2
The baffle on this system should be made the full width of
the furnace plenum in order to properly direct the air into
the distribution ducts.
INSTALLATION #3
Extending the hot air duct from the furnace into the existing
plenum will help direct the flow of air from the furnace as
well as the flow in the existing furnace. Ducting entering
the existing plenum at an angle (approximately 45 degrees)
will facilitate air flow from the furnace while diverting air
from the existing furnace.