Desa CGN30D, CGN18RA AIR for Combustion and Ventilation, Determining AIR Flow for Heater Location

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AIR FOR COMBUSTION AND VENTILATION

Continued

DETERMINING AIR FLOW FOR HEATER 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 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

+

18,000

BTU/Hr

Total

=

 

 

BTU/Hr

58,000

*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)

58,000

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 8.

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.

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Contents OWNER’S Operation and Installation Manual What to do if YOU Smell GASContents Safety InformationSafety Information Local Codes Unpacking Product Features Safety DevicePiezo Ignition System AIR for Combustion VentilationProviding Adequate Ventilation AIR for Combustion and Ventilation Determining AIR Flow for Heater LocationDetermining if You Have a Confined or Unconfined Space Ventilation Air From Inside Building AIR forVentilation AIR Appliances in both spacesVentilation AIR Ventilation Air From OutdoorsCheck GAS Type Installing To WallInstallation Items Locating HeaterInstalling to Wall Removing Front Panel Of Heater Installing Heater to WallMounting Bracket Methods For Attaching Mounting Bracket To WallMarking Screw Locations Attaching Mounting Bracket To WallInstalling Bottom Mounting Screws Placing Heater On Mounting BracketConnecting to GAS Supply CGN30DConnections Pressure Testing GAS Supply Piping SystemChecking GAS Servicing. Correct all leaks at oncePressure Testing Heater GAS Connections CheckingHeater What to do if YOU Smell GASOperating Heater PilotTo Select Heating Level Shutting Off Heater Operating Heater Inspecting BurnerPilot Flame Pattern Shutting Off Burner Only pilot stays litGRH/OV 019A Trouble Shooting CleaningMaintenance ODS/PILOT and Burner OrificeSee Cleaning TROUBLE- ShootingSee Cleaning and Main Service TechnicalParts Not Under Warranty Replacement PartsParts Under Warranty HintsFAN Kits GA3100, GA3100A, and GA3200TA AccessoriesCentrals Valve GA5010Illustrated Parts Breakdown Model CGN18RAParts List KEY Part Number Description QTYModel CGN30D Control Position Label Hardware Assembly Warranty Information Keep this Warranty

CGN30D, CGN18RA specifications

Desa CGN18RA and CGN30D are two advanced space heaters designed for both residential and commercial use. These models are well-regarded for their innovative features, technologies, and exceptional performance, making them suitable choices for various heating needs, particularly in larger spaces.

The CGN18RA is equipped with several key features that enhance its functionality. It boasts a reliable heat output of approximately 18,000 BTUs, ensuring effective warmth during cold months. This model utilizes infrared technology, which enables it to heat objects and people directly rather than just the air. This not only makes the heating experience more comfortable but also reduces energy consumption. Furthermore, the CGN18RA is designed with an adjustable thermostat to provide precise temperature control, allowing users to set their desired warmth levels easily.

On the other hand, the CGN30D offers a more robust heating solution with an output of up to 30,000 BTUs. This model is particularly suited for larger spaces, effectively warming garages, workshops, or open-plan living areas. Like the CGN18RA, the CGN30D utilizes direct infrared heating technology, ensuring efficient and consistent temperatures are maintained. Users appreciate the dual-fuel capability of the CGN30D, allowing it to operate on both natural gas and propane, which adds to its versatility and convenience.

Both models prioritize safety, featuring built-in mechanisms such as tip-over shut-off systems and automatic shut-off valves to prevent potential hazards. Furthermore, the units are constructed with durable materials that withstand regular use while maintaining sleek designs. Portability is another advantage, with easy-to-move structures allowing users to reposition heaters according to their heating requirements.

In summary, Desa CGN18RA and CGN30D are impressive space heaters characterized by their powerful heating capabilities, energy efficiency, and user-friendly features. Their advanced technology, safety mechanisms, and versatility in fuel options make them outstanding choices for anyone looking to maintain a comfortable environment, whether at home or in a commercial space. With these models, users can enjoy reliable warmth and comfort during the colder months.
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