Desa VF-24N-BTB Manuale Utente

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Carefully follow the instructions below. This will ensure safe in-
 stal la tion into a masonry, UL127-listed manufactured fi replace, or 
list ed vent-free fi re box. 

A.  Clearances from the side of the fi re place cabinet to any com-

 bus ti ble  ma te ri al  and  wall  should  follow  di a gram in Figure 4.

 

Example:  The face of a mantel, book shelf, etc. is made of 
com bus ti ble  ma te ri al  and  protrudes  3 

1

/

2

" from the wall. This 

com bus ti ble material must be 4" from the side of the fi replace 
cabinet (see Fig ure 4).

 

Note: When installing your gas logs into a manufactured fi re-
box, follow fi re box manufacturer’s instructions for min i mum 
clear anc es  to  combustible  ma te ri als.

B.  Clearances from the top of the fi re place opening to the ceiling 

should not be less than 42 inches. 

*Minimum 16 inches from Side Wall 

*

Example

INSTALLATION

Heat Resistant
Material 

(A)

12" or more 

Noncombustible material OK.

Between 8" and 12" 

24" Models: Install fi re place hood ac-
cessory (GA6060,  see Ac ces so ries, 
page 27).

 

18" Model: Noncombustible mate-
rial OK.

Less than 8" 

Noncombustible material must be ex-
tended to at least 8". See Be tween 8" 
and 12", above. If you cannot extend 
material, you must operate heater 
with fl ue damper open.

Note: If using a mantel proceed to If Using Mantel. If not using a 
mantel, follow the in for ma tion  on  this  page. 

You must have noncombustible material(s) above the fi replace open-
 ing.  Noncom bus ti ble materials (such as slate, marble, tile, etc.) 
must be at least 1/2 inch thick. With sheet metal, you must have 

NOTICE: Non thermostat controlled heaters maybe used 
as a vented product. If so, you must always run heater 
with chimney fl ue damper open. If running heater with 
damper open, noncombustible material above fi replace 
opening is not needed. Go to Installing Damper Clamp Ac-
cessory for Vented Operataion, page 10. 

INSTALLATION

Installation and Clearances for Vent-Free Operation (Cont.)

noncom bus ti ble  ma te ri al  behind  it.  Noncombustible  ma te ri al  must 
extend at least 8" up (for all mod els). If noncombustible ma te ri al 
is less than 12", you must install the fi re place hood accessory (24" 
and 30" Models Only). See Figure 5 for min i mum  clear anc es.

You must have noncombustible material(s) above the fi replace 
opening. Noncom bus ti ble materials (such as slate, marble, tile, 
etc.) must be at least 1/2 inch thick. With sheet metal, you must 
have noncom bus ti ble  ma te ri al  behind  it.  Noncombustible  ma te ri al 
must extend at least 8 inches up (for all models). If noncombus-
tible ma te ri al is less than 12", you must install the fi re place hood 
ac ces so ry (24" Models Only). Even if noncombustible material is 
more than 12", you may need the hood accessory to defl ect heat 
away from your mantel shelf. See Fig ure 5 and Figures 6 and 7, 
page 9, for min i mum  clear anc es. 

IMPORTANT: If you cannot meet these minimum clearances, you 
must operate heat er with chimney fl ue damper open. Go to In stall ing 
Damper Clamp Accessory for Vented Op er a tion, page 10.