Installation Guide
www.usaprocom.com
9200068-01A
Figure 4 - Minimum Clearance for 
Combustible to Wall
INSTALLATION
IMPORTANT: Vent-free heaters add moisture 
to the air. Although this is benecial, installing 
heater in rooms without enough ventilation air 
may cause mildew to form too much moisture. 
See Air for Combustion and Ventilation, pages 
6 and 7.
Before  beginning  assembly  or  operation  of 
the  product,  make  sure  all  parts  are  pres-
ent.  Compare  parts  with  package  contents 
list.  If  any  part  is  missing  or  damaged,  do 
not  attempt  to  assemble,  install  or  operate 
the  product.  Contact  customer  service  for 
replacement parts.
Before installing heater, make sure you have 
the items listed below:
•  Hardware package (provided with heater)
•  Electric drill with 3/16" drill bit
•  Phillips screwdriver
CHECK GAS TYPE
Be sure your gas supply is right for your heat-
er. Otherwise, call dealer where you bought 
the heater for proper type heater.
CLEARANCES TO 
COMBUSTIBLES
 WARNING: Maintain the mini-
mum clearances. If possible, pro-
vide greater clearances from oor, 
ceiling, and adjoining wall. Measure 
from outermost point of heater.
Minimum Fireplace Clearance To 
Combustible Materials
Side Wall 16", Ceiling 42", Front 36"
LOG SIZING REQUIREMENTS
Minimum Firebox Size
18" Log Set: Height 20", Depth 14", 
Front Width 29", Rear Width 23"
24" Log Set: Height 20.5", Depth 14", 
Front Width 34", Rear Width 25.5"
30" Log Set: Height 20.5", Depth 14", 
Front Width 39", Rear Width 31.5"
Minimum Clearances For Side 
Combustible Material, Side Wall 
and Ceiling
A.  Clearance from the side of the replace 
cabinet to any combustible material and 
wall should follow diagram in Figure 4.
B.  Clearance  from  the  top  of  the  replace 
opening  to  the  ceiling  must  not  be  less 
than 42".
Minimum Noncombustible Material 
Clearances
If Not Using Mantel
Note: If using a mantel, proceed to If Using 
Mantel, page 10. If not using a mantel, follow 
the information below.
You  must  have  noncombustible  material(s) 
above the replace opening. Noncombustible 
materials  (such  as  slate,  marble,  tile,  etc.) 
must be at least 1/2" thick. With sheet metal, 
you must have noncombustible material be-
hind it. Noncombustible material must extend 
at least 12" up (for all models). See Figure 5 
for minimum clearances.
*Minimum 16" from Side Wall
*
Figure 5 - Heat Resistant Material (Slate, 
Marble, Tile, etc.) Above Fireplace
Noncombustible 
Material Distance
Requirements for Safe Installation
(A) 12" or more: Noncombustible material okay.
(A) Between 8" and 12": 
24" & 30" Models, install replace hood 
accessory. 18" Models, noncombustible 
material okay.
(A) Less than 8": Noncombustible 
material must be extended to at least 8". 
See Between 8" and 12", above. If you 
cannot extend material, you must operate 
heater with ue damper open.










