OWNER’S MANUAL

AIR FOR

COMBUSTION AND

VENTILATION

Continued

DETERMINING FRESH-AIR FLOW FOR FIREPLACE LOCATION

Determining if You Have a Confined or Unconfined Space

Use this worksheet to determine if you have a confined or unconfined space.

Space: Includes the room in which you will install fireplace plus any adjoining rooms with doorless passageways or ventilation grills between the rooms.

1.Determine the volume of the space (length x width x height).

Length x Width x Height = ____________________ cu. ft. (volume of space)

Example: Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling height) = 2560 cu. ft. (volume of space)

If additional ventilation to adjoining room is supplied with grills or openings, add the volume of these rooms to the total volume of the space.

2.Multiply the space volume by 20 to determine the maximum Btu/Hr the space can support.

_________________ (volume of space) x 20 = (Maximum Btu/Hr the space can support)

Example: 2560 cu. ft. (volume of space) x 20 = 51,200 (maximum Btu/Hr the space can support)

3.Add the Btu/Hr of all fuel burning appliances in the space.

Vent-free fireplace

 

_________________ Btu/Hr

 

 

 

 

Gas water heater*

 

_________________ Btu/Hr

Example:

 

 

 

Gas furnace

 

_________________ Btu/Hr

Gas water heater

 

30,000

Btu/Hr

Vented gas heater

 

_________________ Btu/Hr

Vent-free fireplace

+

26,000

Btu/Hr

Gas fireplace logs

 

_________________ Btu/Hr

Total

=

56,000

Btu/Hr

Other gas appliances* +

_________________ Btu/Hr

 

 

 

 

Total

=

_________________ 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:

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 6.

B.Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 6.

C.Install a lower Btu/Hr fireplace, 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, Section 5.3 or applicable local codes.

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Desa CF26PT installation manual AIR for Combustion Ventilation, Determining FRESH-AIR Flow for Fireplace Location

CF26PT specifications

Desa CF26PT is a modern and efficient heating solution designed for residential and commercial spaces, providing comfort and convenience in various environments. This appliance stands out with its remarkable features that cater to diverse user needs.

One of the main features of the Desa CF26PT is its powerful heating capacity. With an output of up to 26,000 BTUs, it is capable of warming large areas quickly and effectively. This makes it an ideal choice for homes with open floor plans or larger spaces that require consistent warmth during colder months.

The technology integrated into the Desa CF26PT is another defining characteristic. The unit employs advanced heating technology, ensuring that it operates efficiently and reliably. This not only maximizes performance but also minimizes energy consumption, making it a cost-effective option for consumers. The inclusion of a multi-directional vent ensures that heat is distributed evenly throughout the space, eliminating cold spots and providing a comfortable environment.

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In summary, the Desa CF26PT stands out as a reliable heating solution, offering power, efficiency, and safety in a stylish, compact design. Its advanced technology, user-friendly operation, and robust safety features make it a prominent choice for those seeking effective heating solutions in their spaces.