DUCTWORK INSTALLATION
We strongly recommend that the hot air ductwork be installed by a home heating specialist. If doing the installation yourself, before
you decide which installation will best suit your needs, consult a quali
fi
ed heating technician and follow his recommendations as to the
safest and most ef
fi
cient method of installation.
This furnace can be installed in three ways, as a stand alone unit, parallel, and in series with an existing furnace.
26.13
P
6.31
SUPPLY AIR (HOT AIR)
DUCTWORK OUTLET SIZE
SUPPLY AIR (HOT AIR) PLENUM
The warm-air supply duct shall be constructed of metal in accordance with NFPA
90B, 2-1.1. The plenums installed to the furnace shall be constructed of metal in
accordance with NFPA 90B, 2-1.3.
When installing this furnace the hot air plenum is to have a minimum height of
24” (610mm) if the top of the
fi
rst vertical section is not
fl
ush with the top of the
fi
rst
horizontal section of ductwork. If the top of the plenum is
fl
ush with the top of the
fi
rst horizontal section of ductwork then the minium height is 15” (381mm).
SUPPLY AIR PLENUM
MINIMUM HEIGHT OF 24”
SUPPLY AIR PLENUM WITH
MINIMUM HEIGHT OF 15”
17.00
15.00
18.00
12.63
43
RETURN AIR (FRESH AIR)
The return (fresh) air intake on
the furnace is on the rear of the unit.
The ductwork must be mechanically
attached to the unit or blower kit box
with sheet metal screws to ensure a
proper operation.
RETURN AIR INTAKE SIZE (REAR)
RETURN AIR INTAKE SIZE (SIDE)