www.ironhaus.com or www.desatech.com
123129-01A
14
5. Place flashing over pipe section(s) ex
-
tending through roof. Secure base of
flashing to roof and framing with roofing
nails. Be sure roofing material overlaps
top edge of flashing as shown in Figure
16, page 13. There must be a 1" clearance
from vent pipe to combustible materials.
6. Continue to add pipe sections until height
of vent cap meets the minimum building
code requirements described in Figure 7
on page 7.
Note: You must increase vent height for
steep roof pitches. Nearby trees, adjoining
rooflines, steep pitched roofs and other
similar factors may cause poor draft or
down-drafting in high winds. Increasing
vent height may solve this problem.
7. Twist-lock vent cap onto last section of
vent pipe.
Note: If vent pipe passes through any occu-
pied areas above first floor, including storage
spaces and closets, you must enclose pipe.
You may frame and sheetrock enclosure with
standard construction material. Make sure
and meet the minimum allowable clearances
to combustibles. Do not fill any required air
spaces with insulation.
Vertical Termination Configurations
Figure 18 shows the configurations for vertical
termination.
ventinG inStALLAtiOn
Continued
Figure 18 - Vertical Venting Configuration
Vertical
Venting
V = 40' max.
HIGH ALTITUDE INSTALLATION
Your DESA Heating, LLC direct vent fireplace
has been tested and approved for elevations
from 0-2000 feet (USA).
When installing at an elevation above 2000
feet (in the USA), you may need to decrease
the input rating by changing the existing
burner orifice to a smaller size. Reduce input
4% for each 1000 feet above sea level. Check
with your local gas company for proper orifice
size identification.
When installing this fireplace at an elevation
above 4500 feet, check with local authorities.
OUTSIDE AIR FLEX INSTALLATION
Outside air flex installation is required for both
horizontal and vertical venting installation.
There are 2 outside air flex kits available for
purchase (see
Parts List for Venting Kits and
Components
, page 15).
Construct a 8
1
/
2
" x 8
1
/
2
" framing or opening
on exterior wall (see Figure 19). Install outside
air vent termination in a location that would
not eventually be obstructed by bushes, snow
or other obstructions. Locate outside air vent
near fireplace to make flex duct installation
easier.
Figure 19 - Outside Air Flex Duct
Installation
Outside Air Vent
Termination
Flex Venting
Secure Both Ends of
Flex Using Hi-Temp
Duct Tape
