AIR FOR COMBUSTION AND VENTILATION

Continued

6

DETERMINING AIR FLOW FOR HEATER 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 heater 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.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: 2560 cu. ft. (volume of space) ÷ 50 cu. ft. =

51.2 or 51,200 (maximum

Btu/Hr the space can support)

 

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 appliances*

+ ___________________ Btu/Hr

Total

= ___________________ Btu/Hr

Example: Gas water heater

 

40,000

Btu/Hr

Vent-free heater

+

33,000

Btu/Hr

Total

=

 

 

Btu/Hr

73,000

*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: 51,200

Btu/Hr (maximum the space can support)

73,000

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 7.

B.Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 7.

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.

101992

Page 5 Page 7
Page 6
Image 6
Desa Tech CG3630PV Determining AIR Flow for Heater Location, Determining if You Have a Confined or Unconfined Space
Page 5 Page 7

CG2618PV, CG3630PT, CG3324PT, CG3324PV, CG3630PV specifications

Desa Tech has made significant strides in the heating and appliance industry with its innovative line of products, featuring the CG3630PV, CG3324PV, CG3324PT, CG3630PT, and CG2618PV models. Each of these models offers unique features, cutting-edge technologies, and characteristics designed to meet diverse customer needs while ensuring efficiency and reliability.

The CG3630PV is a versatile model that stands out with its powerful heating capacity, ideal for larger spaces. It utilizes advanced combustion technology that maximizes heat output while minimizing fuel consumption. This model is also equipped with an easy-to-use digital thermostat, allowing users to set their desired temperature with precision.

In contrast, the CG3324PV model is tailored for mid-sized areas. It features a sleek design that blends seamlessly with modern home decor. One of its key characteristics is the eco-friendly design that operates efficiently, reducing carbon emissions while still providing adequate warmth. The CG3324PV incorporates an automatic ignition system, eliminating the hassle of manual lighting.

The CG3324PT model takes a different approach by offering multi-fuel capabilities. Users can choose between propane and natural gas, making it a flexible option for various needs. This model also boasts a compact design, perfect for smaller rooms or confined spaces, without compromising on heat output.

For those looking for a robust option, the CG3630PT offers impressive thermal efficiency and a higher heat output, making it suitable for large living areas or workshops. This model includes a safety shut-off feature that provides peace of mind, ensuring the heater turns off in the event of overheating or other malfunctions.

Finally, the CG2618PV model is designed with portability in mind. It offers a lightweight construction, making it easy to move from room to room as needed. Equipped with a strong heating element and a user-friendly control panel, this model is perfect for quick heating solutions without the need for permanent installation.

Collectively, these models represent Desa Tech's commitment to innovation, user-friendly features, and environmental responsibility, making them excellent choices for consumers seeking reliable heating solutions. With various options tailored to different needs, customers can confidently select the right heater for their home or workspace.
Top Page Image Contents