Negative Pressure - Hearth and Home Technologies GO318-IPI-NG Installation Instructions Manual

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.
Free Opening Area (in square inches) of Chimney Damper for Venting combustion Products from Decorative Appliances for Installation in
Chimney Ht.
(Feet)*
10
15
20
25
30
35
40
Free Opening Area (in square inches) of Chimney Damper for Venting combustion Products from Decorative Appliances for Installation in
Chimney Ht.
(Feet)*
6
8
10
15
20
30
* Height is measured from the hearth to the top of the chimney.
Minimum height is 6 ft.
Hearth & Home Technologies • Grand Oak Hearth Kits • 4004-323 Rev B . 8/2018
Table 1 for Factory Built Fireplaces
GO318 GO318
LP Gas Natural Gas
35.3 not approved
26.4 38.5
22.1 31.2
18.1 27.3
17.3 24.6
15.9 22.1
15.2 20.4
Table 2 for Masonary Built Fireplaces
Solid Fuel Burning Fireplaces.
GO318 GO318
LP Gas Natural Gas
49.2 64
59.7 59.7
54.3 54.3
48.8 48.8
44.4 44.4
40.3 40.3
Table 3 for Minimum Fireplace Dimensions
Front
Log Set Depth
Opening
GO318 32" 23"
GO24
34" 20"
GO30
40" 20"
GO324
34" 23"
GO330
40" 23"
Solid Fuel Burning Fireplaces.
GO24 & 324 GO24 & 324
LP Gas Natural Gas
35.3 not approved
26.4 38.5
22.1 31.2
18.1 27.3
17.3 24.6
15.9 22.1
15.2 20.4
GO24 & 324 GO24 & 324
LP Gas Natural Gas
49.2 64
45.5 59.7
41.7 54.3
37.7 48.8
34.3 44.4
31.2 40.3
Rear Natural
Height
Width BTU
22" 21" 88,000
18" 22" 73,000
18" 29" 80,000
22" 22" 88,000
22" 29" 92,000
WARNING
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.
GO30 & 330 GO30 & 330
LP Gas Natural Gas
44.2 not approved
32.2 45.4
26.4 37.4
22.9 31.2
20.4 28.3
18.9 25.5
18.1 23.8
GO30 & 330 LP GO30 & 330
Gas Natural Gas
56.6 71.4
52.4 66.9
48.2 60.2
43.2 54.1
39.8 49.1
35.9 44.5
Propane
BTU
80,000
61,000
70,000
80,000
82,000
5