Monessen Hearth WDV500 User Manual

12

Vent Terminal

Air Supply Inlet

Area Where Terminals Not Permitted

Inside Corner Detail 

A =  Clearance above the grade, a veranda, porch, deck, or balcony [*12" (305 mm) minimum]. 
B =  Clearance to window or door that may be opened [*12" (305 mm) minimum]. 
C =  Clearance to permanently closed window [*minimum 12" (305 mm) recommended to prevent condensation 

on window]  

 

D

 

=  Vertical clearance to ventilated soffit located above the terminal within a horizontal distance of two (2) feet 

(610 mm) from the centerline of the terminal [18" (457 mm) minimum].  

E

 

=  Clearance to unventilated soffits [12" (305 mm) minimum]. Clearance to vinyl soffit [30" (762 mm)].

F =  Clearance to an outside corner. Figure 9  
G = Clearance to an inside corner. Figure 9  
H =  *Not to be installed above a gas meter/regulator assembly within three (3) feet (914 mm) horizontally from the 

centerline of the regulator. 

I =  Clearance to service regulator vent outlet [*3' (914 mm) minimum]. 
J =  Clearance to non-mechanical air supply inlet to building or the combustion air inlet to any other appliance [*12" 

(305 mm) minimum]. 

K =  Clearance to a mechanical air supply inlet [*6' (1829 mm) minimum]. 
L

 

=  Clearance above a paved sidewalk or paved driveway located on public property [

**

7' (2133 mm) minimum]. 

M

 

= Clearance under veranda, porch, deck, or balcony [For Canada 12" (305 mm) minimum

***

] Figure 9

* 

As  specified  in  CSA  B149  Installation  Codes.  Note:  Local  codes  or  regulations  may  require  different 
clearances. 

**  A vent must 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  of  two  sides  beneath  the 

floor.