Installation Guide
www.usaprocom.com
200199-01B6
WATER VAPOR: A BY-PRODUCT OF 
UNVENTED ROOM HEATERS
Water vapor is a by-product of gas combus-
tion. An unvented room heater produces ap-
proximately one (1) ounce (30 mL) of water 
for every 1,000 BTUs (0.3 KWs) of gas input 
per hour. Unvented room heaters are recom-
mended as supplemental heat (a room) rather 
than a primary heat source (an entire house). 
In most supplemental heat applications, the 
water  vapor  does  not  create  a  problem.  In 
most applications, the water vapor enhances 
the  low  humidity  atmosphere  experienced 
during cold weather.
The following steps will help ensure that water 
vapor does not become a problem.
1.  Be sure the heater is sized properly for the 
application, including ample combustion 
air and circulation air.
2.  If high humidity is experienced, a  dehu-
midier  may  be  used  to  help  lower  the 
water vapor content of the air.
3.  Do not use an unvented room heater as 
the primary heat source.
UNPACKING
1.  Remove top inner pack.
2.  Tilt carton so that heater is upright.
3.  Remove protective side packaging.
4.  Slide heater out of carton.
5.  Remove protective plastic wrap.
6.  Hold the screen, lift, and pull forward.
7.  Remove log set by cutting plastic ties.
8.  Carefully unwrap log.
9.  Check for any shipping damage. If heater 
or log is damaged, promptly inform your 
dealer where you bought the heater.
Figure 1 - Vent-Free Stove
PRODUCT IDENTIFICATION
Logs
Screen
Heater Controls 
(Inside Panel)










