New Buck Corporation CR8T manual EXAMPLE Gas Water Heater 40,000 BTU/Hr

EXAMPLE: Gas Water Heater 40,000 BTU/Hr

Vent-Free Heater +18,000 BTU/Hr

TOTAL = 58,000 BTU/Hr

*DOES NOT INCLUDE DIRECT-VENT GAS APPLIANCES. DIRECT-VENT DRAWS COMBUSTION AIR FROM OUTDOORS AND VENTS TO THE OUTDOORS.

4.Compare the maximum BTU/Hr the space can support with the actual amount of BTU/Hr used.

____________BTU/Hr (maximum the space can support)

____________BTU/Hr ( actual amount of BTU/Hr used)

EXAMPLE: 51200BTU/Hr (maximum the space can support) 58000BTU/Hr (actual amount of BTU/Hr used)

The space in the above example is a confined space because the actual BTU/Hr used is more than the maximum BTU/Hr the space can support. You must provide additional fresh air . Your options are as follows:

A. Rework worksheet, adding the space of an adjoining room. If the extra space provides an unconfined space, remove door to adjoining room or add ventilation grills between rooms . See “Ventilation Air From Inside Building”, page 21.

B.Vent room directly to the outdoors . See “Ventilation Air Outdoors”, page 22.

C.Install a lower BTU/Hr heater , if lower BTU/Hr size makes room unconfined.

If the actual BTU/Hr used is less than the maximum BTU/Hr the space can support, the space is an unconfined space. You will need no additional fresh air ventilation.

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