AIR FOR COMBUSTION AND VENTILATION

Continued

DETERMINING AIR FLOW FOR FIREPLACE LOCATION

Determining if You Have a Confined or Unconfined Space

Use this work sheet 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 22 ft. (length) x 18 ft. (width) x 8 ft. (ceiling height) = 3168 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.Divide the space volume by 50 cubic feet to determine the maximum Btu/Hr the space can support.

____________ (volume of space) ÷ 50 cu. ft. = (Maximum Btu/Hr

the space can support)

Example: 3168 cu. ft. (volume of space) ÷ 50 cu. ft. = 63.3 or 63,300 (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

Gas furnace

 

___________________ Btu/Hr

Vented gas heater

 

___________________ Btu/Hr

Gas fireplace logs

 

___________________ Btu/Hr

Other gas appliances*

+ ___________________ Btu/Hr

Total

= ___________________ Btu/Hr

Example: Gas water heater

 

40,000

Btu/Hr

Vent-free fireplace

+

28,000

Btu/Hr

Total

=

 

 

Btu/Hr

68,000

*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: 63,300

Btu/Hr (maximum the space can support)

68,000

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 work sheet, adding the space of an adjoining room. If the extra space pro- vides an unconfined space, remove door to adjoining room or add ventilation grills between rooms. See Ventilation Air from Inside Building, page 8.

B.Vent room directly to the outdoors. See Ventilation Air from Outdoors, page 8.

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.

Continued

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Desa CGF265PVA Determining AIR Flow for Fireplace Location, Determining if You Have a Confined or Unconfined Space
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CGF265PVA, CGF280PT specifications

Desa CGF280PT and CGF265PVA are advanced gas-powered heating appliances known for their efficiency and innovative features. Ideal for both residential and commercial spaces, these products demonstrate a sophisticated balance of power, performance, and user-friendly design.

The CGF280PT model boasts a robust output of 28,000 BTUs, making it suitable for larger areas that require significant heating capacity. Its high-efficiency system is designed to maximize heat distribution while minimizing energy consumption, allowing users to maintain a comfortable environment without incurring excessive utility costs. Built with a focus on reliable performance, it employs a direct venting system, ensuring optimal combustion and safe, clean operation.

On the other hand, the CGF265PVA model offers a slightly smaller output of 26,500 BTUs and incorporates advanced technology to enhance user experience. One of its standout features is the programmable thermostat, which enables users to set specific temperature preferences. This feature not only enhances comfort but also contributes to energy savings by allowing the system to operate only when necessary.

Both models utilize innovative ceramic technology for their burners. This design not only boosts efficiency by facilitating quicker heat production but also ensures a more even heat distribution within the space. The appliances come equipped with a sleek design that fits seamlessly into modern interiors, featuring a choice of finishes that enhance any decor.

Additionally, the Desa CGF series is engineered with safety in mind. They incorporate high-quality safety measures, including flame sensors and automatic shut-off features, which provide peace of mind during operation. The igniting systems are designed for ease of use, often featuring electronic ignition that eliminates the hassle of manual lighting.

In summary, the Desa CGF280PT and CGF265PVA stand out in the market for their combination of power, efficiency, and cutting-edge technology. Whether for a cozy living room or a larger commercial setting, these heating solutions offer not just warmth, but also energy-efficient operation, ensuring users enjoy both comfort and value. As versatile heating options, they remain a popular choice among homeowners and business owners alike, reflecting modern needs in heating appliances.
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