Installation Guide
4
Installation Instructions and Owner’s Manual
Unvented Liquid Propane Fired Room Heater
around windows and door frames, between wall-
ceiling joints, between wall panels, at penetrations 
for plumbing, electrical, and gas lines, and at other 
openings. 
If you home does not meet all of the three criteria above, 
see Determining the Type of Heater Location Space, below.
Confined Space and Unconfined Space
The National Fuel Gas Code, NFPA 54/ ANSI Z223.1 
defines a confined space as a space whose volume is less 
than 50 cubic feet per 1,000 Btu per hour (4.8 m
3
 per kW) 
of the aggregate input rating of all appliances installed in 
that space, and an unconfined space as a space whose 
volume is not less than 50 cubic feet per 1,000 Btu per 
hour (4.8 m
3
 per kW) of the aggregate input rating of all 
appliances installed in that space. Rooms communicating 
directly with the space in which the appliances are 
installed*, through openings not furnished with doors, are 
considered a part of the unconfined space.
*Adjoining rooms are communication only if there 
are doorless passageways or ventilation grills between 
them.
DETERMINING THE TYPE OF HEATER LOCATION 
SPACE:
Use this method to determine if you have a confined or 
unconfined space.
Note: the space includes the room in which you 
install heater plus any adjoining rooms with doorless 
passageways or ventilation grills between the rooms.
1.  Find the volume of the space by multiplying room length 
x width x height.
Example: Space size 18ft (length) x 18ft. (width) x 8ft. 
  (height) = 2592
If additional ventilation to adjoining room is supplied with 
grills or openings, add the volume of these rooms to the 
total volume of the space.
2.  Divide the space volume by 50 cubic feet to determine the 
maximum Btu/hr the space can support.
Example:  2592 cu.ft. (volume of space) / 50 cu.ft. = 
  51.8 or 51,800 (maximum Btu/hr the space 
  can support)
 WARNING: This heater shall not be installed in a 
room or space unless the required volume of indoor 
combustion air is provided by the method described 
in the National Fuel Gas Code, ANSI Z223.1/NFPA 54, 
the International Fuel Gas Code, or applicable local 
codes
3.  Add the Btu/hr of all the fuel-burning appliances in the 
SAFETY DEVICE
This heater has a pilot with an Oxygen Depletion Sensor 
(ODS) safety shut off system. The ODS/pilot shuts off the 
heater if there is not enough fresh air.
IGNITION SYSTEM
PIEZO: The heater is equipped with a piezo manual ignitor. 
This system requires no matches, batteries, or other source 
to light heater.
LOCAL CODES
Install and use heater with care. 
Installation must conform to local codes or in the absences 
of local codes, use the latest edition of National Fuel Gas 
Code, ANSI Z223.1/NFPA 54.
UNPACKING
1.  Remove heater from carton.
2.  Remove all protective packaging applied to heater 
for shipment.
3.  Check heater for any shipping damage. If heater 
is damaged, promptly inform dealer where you 
bought heater.
FRESH AIR FOR COMBUSTION AND VENTILATION
WARNING: This heater shall not be installed in a confined 
space or unusually tight construction unless provisions are 
provided for adequate combustion and ventilation air. Read 
the following instructions to insure proper fresh air for this 
and other fuel-burning appliances in your home. 
ESTABLISHING ADEQUATE VENTILATION
The following are excerpts from National Fuel Gas Code, 
NFPA 54/ ANSI Z223.1, Section 5.3, Air for Combustion and 
Ventilation. All spaces in homes fall into one of the three 
following ventilation classifications:
1.  Unusually Tight Construction
2.  Unconfined Space
3.  Confined Space
This heater must not be installed in a confined space 
or unusually tight construction unless provisions are 
provided for adequate combustion and ventilation air. The 
information on pages 4 and 5 will help you classify your 
space and provide adequate ventilation.
Unusually Tight Construction 
If your home meets all of the three following criteria you 
must provide additional fresh air. See Ventilation from 
Outdoors, page 5.
Unusually tight construction is defined as construction 
where:
a.  Walls and ceilings exposed to the outside atmosphere 
have a continuous water vapor retarder with a rating 
of one perm (6 x 10
- 11
 kg per pa-sec-m
2
) or less with 
openings gasketed or sealed and
b.  Weather stripping has been added on operable windows 
and doors, and 
c.  Caulking or sealants are applied to areas such as joints 










