Enviro EG 28 B User Manual

 

 
 
 

 

A= Clearance above grade, verandah, porch, deck, or 
 

[balcony (*12 inches (30cm) minimum] 

B= Clearance to window or door that may be opened   [*12 
inches (30cm) minimum] 
C= Clearance to permanently closed window 
 

[minimum 12 inches (30cm) recommended to 

 

prevent condensation on window] 

D= Vertical clearance to ventilated soffit located 
 

above the terminal within a horizontal 

 

distance of 2 feet (60cm) from the center-line 

 

of the terminal 24 inches ( 60cm) minimum 

E= Clearance to unventilated soffit  

[18 inches   (45cm) minimum] 

F= Clearance to outside corner [12 inches minimum] 
G= Clearance to inside corner [`12 inches minimum] 

H= *Not to be installed above a meter/regulator 
 

assembly within 3 feet (90cm) horizontally   from 

the center-line of the regulator 
I= Clearance to service regulator vent outlet  

[*6 feet     (1.8m) minimum] 

J= Clearance to non-mechanical air supply inlet to 
 

building or the combustion air inlet to any 

 

other appliance [12 inches (30cm) minimum] 

K= Clearance to a mechanical air supply inlet  

[*6   feet (1.8m) minimum] 

L= *** Clearance above paved side-walk or paved 
 

driveway located on public property  
[*7 feet      (2.1m) minimum] 

M= Clearance under verandah, porch, deck, or 
 

balcony [*24 inches (60cm) minimum **] 

 

*** 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 verandah, porch, deck, or balcony, is fully open on a minimum of 2 sides beneath the floor 
• 

As specified in CGA B149 Installation Codes (1991) Note: Local Codes or Regulations may require different clearances 

 

 

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