Warning, G. negative pressure – Hearth and Home Technologies GO24-IPI-LP User Manual
Page 5
Hearth & Home Technologies • Grand Oak Gas Log Sets • 4004-299 Rev H • 05/08
5
Asphyxiation Risk
This appliance produces carbon monoxide
(CO).
• The free opening areas (in square inches)
of the chimney damper as shown in the
following tables must be met.
• User must make sure damper is locked
open.
• The installer is responsible to ensure
proper ventilation of flue gases before
appliance is used.
Fire needs to draft properly for safe
operation.
WARNING
Table 1 for Factory Built Fireplaces
Free Opening Area (in square inches) of Chimney Damper for Venting combustion
Products from Decorative Appliances for Installation in Solid Fuel Burning Fireplaces.
Chimney Ht.
(Feet)*
GO 24 & 35
LP Gas
GO 24 & 35
Natural Gas
GO 30 & 40
LP Gas
GO 30 & 40
Natural Gas
0
5.
not approved
44.2
not approved
5
26.4
8.5
2.2
45.4
20
22.
.2
26.4
7.4
25
8.
27.
22.9
.2
0
7.
24.6
20.4
28.
5
5.9
22.
8.9
25.5
40
5.2
20.4
8.
2.8
Table 2 for Masonary Built Fireplaces
Free Opening Area (in square inches) of Chimney Damper for Venting
combustion Products from Decorative Appliances for Installation in Solid Fuel
Burning Fireplaces.
Chimney Ht.
(Feet)*
GO 24 & 35
LP Gas
GO 24 & 35
Natural Gas
GO 30 & 40
LP Gas
GO 30 & 40
Natural Gas
6
49.2
64
56.6
7.4
8
45.5
59.7
52.4
66.9
0
4.7
54.
48.2
60.2
5
7.7
48.8
4.2
54.
20
4.
44.4
9.8
49.
0
.2
40.
5.9
44.5
* Height is measured from the hearth to the top of the chimney.
Minimum height is 6 ft.
G. Negative Pressure
Negative pressure results from the imbalance of air avail-
able for the fireplace to operate properly. Causes for this
imbalance include:
• Exhaust fans (kitchen, bath, etc.).
• Range hoods.
• Combustion air requirements for furnaces, water heaters
and other combustion appliances.
• Clothes dryers.
• Location of return-air vents to furnace or air
conditioning.
• Imbalances of the HVAC air handling system.
• Upper level air leaks: recessed lighting, attic hatch
opening, duct leaks.
Table 3 for Minimum Fireplace Dimensions
Log Set
Front
Opening
Depth
Height
Rear
Width
Natural
BTU
Propane
BTU
GO24
2 in.
20 in.
8 in.
2 in.
7,000
6,000
GO0
8 in.
20 in.
8 in.
27 in.
80,000
70,000
GO5
4 in.
2 in.
22 in.
22 in.
88,000
80,000
GO40
40 in.
2 in.
22 in.
29 in.
92,000
82,000