New Buck Corporation ZCBB dimensions

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Example:

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 Fireplace Logs

 

_________________________BTU/Hr.

Other Gas Appliance*

+_________________________BTU/Hr.

Total

 

= _________________________BTU/Hr.

Example:

Gas water heater

40000 BTU/Hr.

 

Vent-free heater

+

18000 BTU/Hr.

 

Total

 

=

58000 BTU/Hr.

*Does 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:

51200

BTU/Hr (maximum the space can support)

 

58000

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. Additional fresh air must be provided. The following options are available.

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 15.

B.Vent room directly to the outdoors. See “Ventilation Air From Outdoors” page 16.

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 unconfined. You will need no additional fresh air ventilation.

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Contents UNIVERSAL BOX Revised MarchPage TABLE OF CONTENTS Page SAFETY INFORMATION WARNINGS ZCBB FRONT TOP FRONT PANELCANOPY DOORSINSTALLATION CHOOSING THE LOCATION FOR YOUR FIREBOXFIREBOX AND FRAMING DIMENSIONS ZC & FF GAS LINEINSTALLING THE FIREBOX FIREBOX CLEARANCESFINISHING YOUR FIREBOX CLEARANCESCOMBUSTIBLE INSTALLATION INSTRUCTIONS CLEARANCESTOP VIEW ZCBBASSEMBLY INSTRUCTIONS CLEARANCESREAR VIEW PRODUCING ADEQUATE VENTILATION DETERMINING FRESH-AIRFLOW FOR HEATER LOCATIONPage VENTILATION AIR VENTILATION AIR FROM INSIDE BUILDINGVENTILATION AIR FROM OUTDOORS THERMOSTAT WIRES OPTIONAL BLOWER INSTALLATIONTHERMOSTAT WIRING DIAGRAM MA ZCBB714 BLACK WHITEREPLACEMENT PARTS OPTIONAL PARTS