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Provide adequate clearance to combustibles per Table 3 at
control end of heater for servicing and minimum on top and
sides for ventilation and combustion air supply.
A minimum clearance of 8’ above floor for public garages in
accordance with NFPA No. 88 most recent edition, or
Figure 1; whichever is larger.
Canadian installations in public garages must comply with
CGA 149B.1.9 most recent edition.
WARNING: Maintain clearances as shown in Figure 2
or on heater nameplate.
CHAPTER II
HEATER INSTALLATION
1. GENERAL INSTALLATION INFORMATION
AND REQUIREMENTS
• The required minimum clearances to combustible
surfaces are illustrated in Figure 2 and Table 3.
As shown on Figure 2, the front of the heater is
installed at the minimum required clearance to
combustible surfaces and toward open space,
and then the other sides must have a minimum
clearance of 16 inches to combustible surfaces.
EXHAUST
VENT
CEILING
14”
MINIMUM
16”
MINIMUM
48”
MINIMUM
OPEN
WORKSHOP DOOR
HEATER
WALL
BRACKET
16”
MINIMUM
14-1/2”
FLOOR LINE
30
1. ONLY FLUE SIDE OF HEATER CAN
BE ELEVATED (30
o
).
2. HEATER SIDE REFLECTOR MUST
BE HORIZONTAL.
NOTE:
Figure 2. Installation Clearances to Combustible Surfaces
Table 3. Installation, Ventilation and Mounting Information
BTU/HR. RATING NORMAL
MODEL GAS MOUNTING CLEARANCES TO COMBUSTIBLE SURFACES
NO. NAT. L.P. POSITION TOP SIDES BACK BELOW
MH/HS25NG 25,000 — 30
o
14" 16" 16" 48"
MH/HS25LP — 22,000 30
o
14" 16" 16" 48"
5
Installation instructions and Owner’s Manual
Model # MH25NG/LP HS25NG/LP