Mr. Heater MH25NG Mode D'emploi page 6

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This heater may be mounted on any wall;
however, it is recommended that the heater be
mounted in the middle of the wall opposite any
overhead doors.
•
When selecting installation locations for this
heater ensure that the opening of any exterior
or interior doors or windows will not violate
minimum clearances or contact any heater
components.
•
If an overhead door is installed in the building,
verify that the heater is not installed in such
a way as to interfere with door operation and
verify that the door in its open position will
not reduce clearances below the minimum
requirements. Never mount the heater in such
a way that would position the heater above an
opened overhead door.
•
In most cases the infiltration around your
uninsulated entry doors and windows will
provide enough air flow for efficient heater
operation.
Unrestricted air flow during heater operation is essential
to prevent the area above the installed heater from
overheating. If your workshop/utility building is tightly
insulated (including windows, doors, openings, etc.) the
following ventilating methods must be followed:
•
A single exhaust vent is supplied with your
heater for your convenience. This vent must
be located above the heater (preferably at
the highest point in the building interior) and
it must vent to the exterior of the building. An
additional vent is available from the factory
for those having a finished workshop or utility
building.
•
An intake vent, or equivalent, from the exterior
of the building and having an effective area of
75 square inches must be located below the
heater (preferably within 2 feet of the building's
floor).
•
Openings equivalent to intake vent would
be: partially open doors and partially open
windows.
•
Openings of this size (5 inch by 13 inch, or 3
inch by 25 inch) will prevent dangerous heat
buildup above the heater.
Ensure that no gas lines or electrical wiring or conduits
will interfere with mounting of the heater to the wall.
Depending on local codes and requirements and the
installer's skill level, the sizing and installation of gas
lines required to supply the heater may require the
Mr. Heater / Infrared Workshop Heater
assistance of a professional. If in doubt as to these
requirements, discuss the requirements of this manual
with the dealer from whom the heater was purchased
and your gas supplier, or call our customer service
department at 1-800-251-0001.
The selection of the thermostat mounting location is
critical to efficient and effective heater operation.
•
The thermostat should be mounted about 5 feet
above the floor where air can circulate freely
around it.
•
The thermostat should not be mounted directly
to a cold exterior wall without an insulated
mounting block.
•
The thermostat should not be mounted in direct
drafts.
•
The thermostat should not be mounted directly
below the installed the heater.
•
The thermostat should not be installed at a
distance that is farther from the heater than the
length of the thermostat cable.
2. HEATER MOUNTING INSTRUCTIONS
After selecting the heater installation location and the
thermostat location and after verifying and ensuring that
all of the above placement requirements are fulfilled,
mount the heater as follows:
A. Determine how you wish to install the vent based
on the construction of the building and your
personal preference. (i.e., do you wish the flanged
(finished) side on the interior or the exterior of the
building or do you want two vents so that both
exterior and interior will be finished?) If needed,
order an additional vent from the factory. Our
address and toll free phone number are on the rear
cover of this manual. Install the vent as follows:
1. See Figure 3 for dimensions and information on
the vent.
2. Select a place as high above the heater
as possible in accordance with the above
requirements and ensure that the vent or vents
will not contact or interfere with existing building
systems (i.e., ducts, wiring, plumbing, etc.)
3. Place the unfinished side of the vent against
the wall in its elected location and trace its
dimensions on the wall with a pencil or other
suitable marker.
4. Cut or otherwise open a hole in the wall,
or walls for finished buildings, having the
dimensions of the unfinished side of the vent.
Installation instructions and Owner's Manual
E6