Hearth and Home Technologies GO30MTCH, GO24MTCH Negative Pressure, Asphyxiation Risk

G. Negative Pressure

Negative pressure results from the imbalance of air avail- able for the fi replace 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.

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 fl ue gases before appliance is used.

Fire needs to draft properly for safe operation.

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.	24 in. Log Set	30 in. Log Set
(Feet)*	Natural Gas	Natural Gas
10	not approved	not approved
15	38.5	45.4
20	31.2	37.4
25	27.3	31.2
30	24.6	28.3
35	22.1	25.5
40	20.4	23.8

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.	24 in. Log Set	30 in. Log Set
(Feet)*	Natural Gas	Natural Gas
6	64	71.4
8	59.7	66.9
10	54.3	60.2
15	48.8	54.1
20	44.4	49.1
30	40.3	44.5

*Height is measured from the hearth to the top of the chimney. Minimum height is 6 ft.

Table 3 for Minimum Fireplace Dimensions

Log Set	Front			Rear	Natural
Size	Opening	Depth	Height	Width	BTU
24	32 in.	15 in.	18 in.	21 in.	73,000
30	38 in.	15 in.	18 in.	27 in.	80,000

Hearth & Home Technologies • Grand Oak Match Light Gas Log Sets • 4004-300 Rev C • 12/05 5