Desa RFP28TB 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

 

30,000

BTU/Hr

Vent-free heater

+

 

28,000

BTU/Hr

Total

=

58,000

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)

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 10.

B.Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 11.

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 What to do if YOU Smell GAS OWNER’S Operation and Installation ManualSafety Information ContentsSafety Information Product Identification Safety DevicePiezo Ignition System Thermostatic Heat ControlAssembly Installing LogRemoving Front Panel Of Heater Assembling Heater Attaching Brass Front Trim to Front PanelAssembling and Attaching Brass Trim AssemblyAIR for VentilationProviding Adequate Ventilation AIR for Combustion and Ventilation Determining AIR Flow for Heater LocationDetermining if You Have a Confined or Unconfined Space Ventilation AIR Ventilation Air From Inside BuildingAppliances in both spaces Ventilation Air From Outdoors Ventilation AIRInstallation Items InstallationCheck GAS Type Locating HeaterThermostat Sensing Bulb Locating Thermostat Sensing BulbAttaching Thermostat Sensing Bulb Mounting Bracket Installation OptionsMethods For Attaching Mounting Bracket To Wall Marking Screw LocationsPlacing Heater On Mounting Bracket Attaching Mounting Bracket to WallMounting Heater on Optional Hearth Base Securing Hearth Base to FloorAttaching Heater to Hearth Base Mounting Heater to Optional Hearth BaseAssembling Mantel Installing Mantel to HeaterPre-Drilled Hole Screw Hearth Base Accessory Wood Plug External Regulator with Vent Pointing Down Connecting to GAS SupplyTo GAS ConnectingSupply Checking GASChecking Pressure Testing Heater GAS ConnectionsOperating Heater For Your Safety Read Before LightingPilot Shutting Off Burner Only pilot stays lit Shutting Off HeaterPilot Flame Pattern Inspecting BurnerCorrect Burner Flame Pattern Burner Flame PatternTrouble Shooting ODS/PILOT and BurnerCabinet Trouble Cleaning and MainteTROUBLE- Shooting Shut off gas supply If you smell gasDo not try to light any appliance Ing statement atReplacement Parts ServiceTechnical HintsFBD Parts CentralsFAN KIT GA3100A Manual or GA3200TA Thermostat AccessoriesHearth Base GHB802B or GHB38 GS601 Black SurroundUnfinished GMU801A,B Finished GMF800A,B Unfinished GMC23UA Finished GMC22FAUnfinished GMC33U Finished GMC32F RFP28TB KEY Part Number Description Parts List RFP28TB101935 101935 Keep this Warranty Warranty Information