Unvented natural gas log heater – Desa CGS2718N User Manual

Page 6

Advertising
background image

6

107067

UNVENTED NATURAL GAS LOG HEATER

CGS2718N, CGS3124N,
CLD3018NA, and CLD3924NTA

AIR FOR
COMBUSTION AND
VENTILATION

Continued

WARNING: Rework work-

sheet, adding the space of the
adjoining unconfined space. The
combined spaces must have
enough fresh air to supply all
appliances in both spaces.

Figure 3 - Ventilation Air from Outdoors

Ventilation Air From Outdoors

Provide extra fresh air by using ventilation
grills or ducts. You must provide two per-
manent openings: one within 12" of the
ceiling and one within 12" of the floor.
Connect these items directly to the outdoors
or spaces open to the outdoors. These spaces
include attics and crawl spaces. Follow the
National Fuel Gas Code NFPA 54/ANS
Z223.1, Section 5.3, Air for Combustion and
Ventilation
for required size of ventilation
grills or ducts.

IMPORTANT:

Do not provide openings for

inlet or outlet air into attic if attic has a
thermostat-controlled power vent. Heated air
entering the attic will activate the power vent.

Figure 2 - Ventilation Air from Inside Building

Outlet
Air

Ventilated
Attic

Outlet
Air

Inlet
Air

Inlet Air

Ventilated

Crawl Space

To

Crawl

Space

To Attic

Or

Remove

Door into

Adjoining

Room,
Option

3

Ventilation Grills

Into Adjoining Room,

Option 2

Ventilation

Grills

Into Adjoining

Room,

Option 1

12"

12"

VENTILATION AIR

Ventilation Air From Inside
Building

This fresh air would come from an adjoin-
ing unconfined space. When ventilating
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 con-
necting the two spaces (see options 1 and
2, Figure 2). You can also remove door
into adjoining room (see option 3, Figure
2). Follow the National Fuel Gas Code
NFPA 54/ANS Z223.1, Section 5.3, Air for
Combustion and Ventilation
for required
size of ventilation grills or ducts.

Advertising