9
Mobile Home Down Draft Furnace Con-
nections
:
Installation should be done by a
qualified professional. Maximum run 40’ - a
duct run in excess of 40’ will greatly restrict
the air flow / heat output and is not recom-
mended.
In a mobile home, with a down-draft furnace,
do not attach the hot air duct from the OS2200
to the hot air plenum doing so will cause the
heat to rise through the central furnace instead
of going through the duct work. Split the hot
air supply of the OS2200 by using a “Y” and
install one branch into each of the hot air ducts,
be sure both are pointing downstream. (
See
diagram - maximum reduction for each “Y”
duct run, 8”).
Fire Chief
OS2200
Hot Air
Cold Air
Downdraft
Furnace
Types of inst
Types of inst
Types of inst
Types of inst
Types of installa
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No Duct work Installation Connections
:
Installation should be done by a qualified profes-
sional. Cold air return must be installed in all installations, even those without duct work.
When there is no duct system to connect to the hot air flex duct, keep the following in mind:
1. You must separate the hot air duct from the cold air return - ideally locate each at
opposite ends of the home, if you do not the air will not flow evenly throughout the home. This
method will work well on homes built on concrete slabs and create a good air flow.
2. In homes with a basement, you may run the hot air duct to the basement and pull the
cold air return from the main floor, this will create a perfect air flow, since hot air rises. The cold
air return must be connected even if the home does not have duct work - if you do not connect the
cold air return, the furnace will not be able to heat the home.
See diagram below for homes with
no duct work.
Hot Air
Cold Air
Hot Air
Cold Air
8”
8”
10”
12”
