Comfort Plus Installation 2.02
Installation
PLACEMENT AND CLEARANCE REQUIREMENTS
The physical dimensions of the Comfort Plus, along with the
clearances required, MUST be taken into consideration when
choosing its location within a structure. (See Figures 2 and 3 for
system dimensions and clearance requirements.)
The best installation location for this system is in a space requir-
ing heat so some amount of the heating requirements can be
satisfied through static dissipation from the warm outer panels of
the Comfort Plus. In situations where the Comfort Plus is not
installed in an area it is intended to heat (i.e. garage), it is impor-
tant to account for the heat lost through static dissipation by
making proper adjustments when sizing the system.
The minimum area required for the installation of the
Comfort Plus is 100 square feet. This area must remain
free of debris and room air should be maintained at less
than 85
o
Fahrenheit. If the system is being installed in an area
with less than 400 square feet, ventilation MUST be provided.
To ventilate, a minimum of a 24” X 24” opening must be installed, if not already present, into the area where the
Comfort Plus is located. In addition, a 6” X 6” non-closing type register must be cut into the return air duct of the
furnace to minimize heat build-up in the room. This register must be installed in a manner that ensures the air
drawn into the Comfort Plus passes through the filter first (see Figure 3A).
In addition to the physical space requirements, the weight of the Comfort Plus must also be taken into consider-
ation when selecting the installation surface. A level concrete floor is the best installation surface on which to
place the system, but most well supported surfaces are acceptable. If unsure of floor load capacity, consult a
building contractor or architect.
Special requirements must be considered if placing the system in a garage or other area where combustible vapors
may be present. Consult local, state, and national codes and regulations to ensure proper installation. An 18"
pedestal (Order Item #1301585) is available to elevate the 4100 Series.
3100 SERIES SYSTEM REQUIREMENTS
FIGURE 2
Back and Bottom = 0 clearance
Left Side = 4 inches
Right Side = 8 inches (from combustible material)
Top = 8 inches (from combustible material)
Front = 36 inches (for ease in servicing)
Outer Sides of System Ducts (Return and Supply) = 0 clearance
Between Ducting and System = 0 clearance (top and right side)
2A
2B
CLEARANCES
2D
Return
Air
Plenum
(Factory
Supplied)
2C
DIMENSIONS
Minimum clearance requirements do NOT account
for space needed for making electrical connections.
FRONT VIEW
8" MIN CLEARANCE TO COMBUSTIBLES,
0" MIN CLEARANCE TO DUCTING
15 6060
4" MIN
CLEARANCE
M
STEFFES
A
M
M
P
36" MIN CLEARANCE (FRONT)
0" MIN
CLEARANCE
TO RETURN
AIR DUCT
TOP VIEW
O" MIN
CLEARANCE
(BACK)
15
1
8
"
21
3
8
"
2
3
16
"
21
3
8
"
17
1
8
"
1"
27"
1"
8
1
2
"
11
1
2
"
48"
60"
63"
41
5
8
"
10
1
8
"
16"
TOP VIEW
Risk of injury or fire. Violation of the
clearance requirements and/or failure to
provide proper ventilation can cause
improper operation of the system. Main-
tain the placement and clearance re-
quirements as specified and provide
ventilation as necessary.
Risk of Equipment Damage: Failure to
maintain room temperature in the me-
chanical room of 85
o
F or less may
result in equipment damage. Thermo-
statically controlled ventilation should be
provided if the temperature in this area
exceeds 85
o
F.
WARNING
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