Thermablaster WLT060-VF, Руководство пользователя

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3. Add the BTU/hr of all fuel burning appliances in the space.
Vent-free heater
BTU/hr
Gas water heater* BTU/hr
Gas furnace BTU/hr
Vented gas heater BTU/hr
Gas heater logs BTU/hr
Other gas appliances* + BTU/hr
Total = BTU/hr
Example:
Gas water heater 30,000 BTU/hr
Vent-free heater + 26,000 BTU/hr
Total = 56,000 BTU/hr
*Do not include direct-vent gas appliances. Direct-vent draws combustion air from the 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 : 51,200 BTU/hr (maximum the space can support)
56,000 BTU/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:
Rework worksheet, adding the space of an adjoining room. If the extra space provides an unconfined
space,
a) remove door to adjoining room or add ventilation grills between rooms. See “Ventilation Air From
Inside Building ” on next page.
b)Vent room directly to the outdoors. See “Ventilation Air From Outdoors ” on next page.
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.
WARNING: If the area in which the heater may be operated is smaller than that defined as an
unconfined space or if the building is of unusually tight
construction, provide adequate combustion and ventilation air
by
one of the methods described in the National Fuel Gas Code,
ANSI Z223.1/NFPA 54. Air for Combustion and Ventilation, or
applicable local codes.
WARNING: If the area in which the heater may be
operated does not meet the required volume for indoor
combustion air, combustion and ventilation air shall be
provided by one of the methods described in the
National
Fuel Gas Code, ANSI Z223.1/NFPA 54, the International Fuel
Gas Code, or applicable local codes.