Warning, G. negative pressure – Hearth and Home Technologies GO35MTCH User Manual

Page 5

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Hearth & Home Technologies • Grand Oak Match Light Gas Log Sets • 4004-300 Rev D • 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

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 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

GO 30 & 40

0

not approved

not approved

5

38.5

45.4

20

3.2

37.4

25

27.3

3.2

30

24.6

28.3

35

22.

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.

(Feet)*

GO 24 & 35

GO 30 & 40

6

64

7.4

8

59.7

66.9

0

54.3

60.2

5

48.8

54.

20

44.4

49.

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

Opening

Depth

Height

Rear

Width

Natural

BTU

GO24

32 in.

20 in.

8 in.

2 in.

73,000

GO30

38 in.

20 in.

8 in.

27 in.

80,000

GO35

34 in.

23 in.

22 in.

22 in.

86,000

GO40

40 in.

23 in

22 in.

29 in.

86,000

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