Determining The Type Of Heater Location Space - Mr. Heater MHVFG30LP Installation Instructions And Owner's Manual

VENTILATION AIR
Ventilation from Inside Building
This fresh air would come from an adjoining unconfined
space. When ventilation to an adjoining unconfined
space, you must provide two permanent openings: one
within 12" of the ceiling and one within 12" of the floor
on the wall connecting the two spaces (see options 1
& 2 of fig. 2). You can also remove door into adjoin-
ing room (see option3, fig 2). Follow the National Fuel
Gas Code NFPA 54/ ANSI Z223.1, the International
Fuel Gas Code or applicable local codes, Air for
Combustion and Ventilation for required size of ventila-
tion grills or ducts.
Or remove
Ventilation door into
Grills into
Adjoining
Adjoining Room -
Room -
Option 3
Option 1
Figure 2.
OUTLET AIR
OUTLET
AIR
INLET
AIR
Figure 3.
12"
Ventilation Grills into
Adjoining Room - Option 2
12"
VENTILATION AIR
VENTILATED
ATTIC
TO ATTIC
TO CRAWL
SPACE
VENTILATION CRAWL SPACE
Unvented LP-Gas Vent Free Room Heaters
Ventilation from Outdoors
If necessary provide extra fresh air by using ventila-
tion grills or ducts. Connect these items directly to the
outdoors or spaces open to the outdoors. These include
attics* and crawl spaces. Follow the National Fuel Gas
Code NFPA 54/ ANSI Z223.1, the International Fuel
Gas Code or applicable local codes, Air for Com-
bustion and Ventilation for required size of ventilation
grills or ducts.
*IMPORTANT: Do not provide openings for inlet or
outlet into attic. If attic has a thermostat-controlled
power vent, heated air entering the attic will activate
the power vent.
IMPORTANT: Vent-free heaters add moisture to
the air. Although this is beneficial, installing heater
in rooms without enough ventilation air may cause
mildew to form from too much moisture. See Fresh
Air for Combustion and Ventilation, page 5.
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Installation Instructions and Owner's Manual