Monessen Hearth LX32DV User Manual

15

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CFM145a 
DV Termin Location 
5/01/01 Rev. 12/05/01  
sta 

INSIDE 

CORNER DETAIL 

CFM145a 

  A =  Clearance above grade, veranda, porch,  

12” (30 cm) 

12” (30 cm) 

  deck, or balcony
  B =  Clearance to window or door that may be  

6” (15 cm) for appliances  

6” (15 cm) for appliances

   

opened 

< 10,000BTU/h (3kW), 12” (30 cm)  

< 10,000 BTU/h (3kW), 9” 

 

   

 

for appliances > 10,000 Btuh (3kW) and 

(23 cm) for appliances > 10,000 

   

 

< 100,000 BTU/h (30kW), 36” (91 cm) 

Btuh (3kW) and < 50,000 BTU/h 

   

 

for appliances > 100,000 BTU/h (30kW) 

(15kW), 12” (30 cm) for 

   

 

 

appliances > 50,000 BTU/h(15kW)

  C =  Clearance to permanently closed window 

12” (305 mm) recommended to 

12” (305 mm) recommended to  

   

 

prevent window condensation 

prevent window condensation

  D = Vertical clearance to ventilated soffit located   

 

 

 

 

 

  above the terminal within a horizontal  

18” (458 mm) 

18” (458 mm) 

 

 

  distance of 2’ (610mm) from the center 

 

 

 

 

 

 

  line of the terminal
  E =  Clearance to unventilated soffit 

12” (305 mm) 

12” (305 mm)

  F =  Clearance to outside corner  

see next page 

see next page

  G = Clearance to inside corner (see next page) 

see next page 

see next page

  H =  Clearance to each inside of center line 

3’ (91 cm) within a height of 15’ (5 m)  

3’ (91 cm) within a height of 15’ 

   

extended above meter/regulator assembly 

above the meter/regulator assembly 

(5 m) above the meter/regulator 

   

 

 

assy

  I =  Clearance to service regulator vent outlet 

3’ (91 cm) 

3’ (91 cm)

  J =  Clearance to nonmechanical air supply inlet  6” (15 cm) for appliances < 10,000 

6” (15 cm) for appliances

   

to building or the combustion air inlet to any  BTU/h (3kW), 12” (30 cm) for 

< 10,000 BTU/h (3kW), 9”

   

other appliances 

appliances > 10,000 BTU/h (3kW) and   

(23 cm) for appliances > 10,000

   

 

< 100,000 Btuh (30kW), 36” (91 cm) 

BTU/h (3kW) and < 50,000 BTU/h

   

 

for appliances > 100,000 BTU/h (30kW) 

(15kW), 12” (30 cm) for  

   

 

 

appliances > 50,000 BTU/h(15kW)

  K =  Clearance to a mechanical air supply inlet 

6’ (1.83 m) 

3’ (91 cm) above if within 10'   

    

 

 

(3 m) horizontally

  L =  Clearance  above paved sidewalk or paved  7’ (2.13 m)† 

 

7’ (2.13 m)†

   

driveway located on public property

  M = Clearance under veranda, porch, deck or 

12” (30 cm) 

 

12” (30cm)

   

balcony 

 

 

 

1 In accordance with the current CSA-B149 Installation Codes
2 In accordance with the current ANSI Z223.1/NFPA 54 National Fuel 
Gas Codes
† A vent shall not terminate directly above a sidewalk or paved 
driveway which is located between two single family  

 

dwellings and serves both dwellings
 only permitted if veranda, porch, deck or balcony is fully open on a 
minimum 2 sides beneath the floor:

NOTE: 1. Local codes or regulations may require different    
 

  clearances.

 

2. The special venting system used on Direct Vent Fireplaces  

 

  are certified as part of the appliance, with clearances  

 

  tested and approved by the listing agency.

 

3. MHSC assumes no responsibility for the improper   

 

  performance of the appliance when the venting system  

 

  does not meet these requirements.