Air For Combustion

and Ventilation

Continued

If the actual Btu/Hr used is less than the maxi- mum 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 oper- ated 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/NFPA54 Section 5.3 or applicable local codes.

VENTILATION AIR

Ventilation Air From Inside Building

This fresh air would come from an adjoining un- confined space. When ventilating to an adjoining unconfined space, you must provide two perma- nent openings: one within 12" of the ceiling and one within 12" of the floor on the wall connecting the two spaces (see options 1 and 2, Figure 6). You can also remove door into adjoining room (see option 3, Figure 6). Follow the National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for Combustion and Ventilation for required size of ventilation grills or ducts.

Ventilation Air From Outdoors

Provide extra fresh air by using ventilation grills or ducts. You must provide two permanent openings: one within 12" of the ceiling and one within 12" of the floor. Connect these items directly to the outdoors or spaces open to the outdoors. These spaces include attics and crawl spaces. Follow the National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for Combustion and Ventilation for required size of ventilation grills or ducts.

IMPORTANT: Do not provide openings for inlet or outlet air into attic if attic has a thermostat- controlled power vent. Heated air entering the attic will activate the power vent.

 

Outlet

Ventilated

 

Attic

 

Air

 

 

Outlet

 

 

Air

 

To Attic

 

 

 

 

To

 

 

Crawl

Inlet

 

Space

 

 

Air

 

 

 

Inlet Air

Ventilated

 

Crawl Space

 

 

Figure 7 - Ventilation Air from Outdoors

Shown with Optional Mantel

Installation

NOTICE: This heater is intended for use as supplemental heat. Use this heater along with your primary heating system. Do not install this heater as your pri- mary heat source. If you have a central heating system, you may

Ventilation

 

Grills

Or

into Adjoining

Remove

Room,

Door into

Option 1

Adjoining

 

Room,

 

Option 3

12"

Ventilation Grills

Into Adjoining Room,

Option 2

run system’s circulating blower while using heater. This will help circulate the heat throughout the house. In the event of a power outage, you can use this heater as your primary heat source.

12"

Figure 6 - Ventilation Air from Inside Building Shown with Optional Mantel

WARNING: A qualified ser- vice person must install fire- place. Follow all local codes.

www.desatech.com119508-01A

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Desa LGCFTP, LGCFTN Installation, Ventilation AIR, Ventilation Air From Inside Building, Ventilation Air From Outdoors
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LGCFTN, LGCFTP specifications

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