United States Stove Company 1800GC User Manual

Page 6

EXISTING
FURNACE
(if used)

HOTBLAST
FURNACE

HOT AIR
PLENUM

2" MIN.

1" MIN.

HOT AIR DUCT

MINIMUM CLEARANCES

TO COMBUSTIBLES

(2.54 cm)

6' (182.88cm)

(5.08 cm)

(2.54 cm)

CONNECTING HOT AIR DUCT TO FURNACE

We strongly recommend that the hot airduct work be installed by a home
heating specialist. If doing the installation yourself, before you decide
which installation will best suit your needs, we recommend that you consult
a qualified heating technician and follow his recommendations as to the
most safe and efficient method of installation.

The connection of the add-on to an existing furnace imposes a
greater work-load on the air-circulating blower. Unless
compensating adjustments are made, the additional restriction
will reduse air flow, and overheating of the existing furnace can
result. To provide a reference point for later adjustments,you
must test air flow before any installation work begins.

There are two methods of evaluating existing air flow: the static
pressure drop method and the temperature rise method.

HOTBLAST FURNACE MODIFICATIONS

1. Cut and insert a piece of sheet metal of sufficient thickness to
provide a tight fit over the opening on the back of the Hotblast
furnace.

2. Cut an opening in the side of the Hotblast furnace that will face
your existing furnace. (see illustration)

16" (40.64 cm)

10" (25.4 cm)

CUTOUT

8" H x 14" W

(20.32 x 35.56 cm)

BEND BACK
FLANGE

(15.24 cm)

FINISHED
OPENING
10" x 16"

1" (2.54 cm)

DUCTWORK

INSTALLATION

And Minimum

Clearances