Trane DHMB060BCV3VB, Installer'S Manual

Installer’s Guide

Table 11

Non-Direct Vent Terminal Clearances

Canadian Installations

US Installations

A=

Clearance above grade, veranda, porch, deck,  
or balcony

12 inches (30 cm)

12 inches (30 cm)

B=

Clearance to window or door that may be opened

6 inches (15 cm) for appliances =/< 10,000 Btuh (3 kw),  
12 inches (30 cm) for appliances > 10,000 Btuh (3 kw)  
and =/< 100,000 Btuh (30 kw),  
36 inches (91 cm) for appliances > 100,000 Btuh (30 kw)

4 feet (1.2m) below or to the side of opening; 1 foot 

(0.3m) above opening.

C=

Clearance to permanently closed window

*

*

D=

Vertical clearance to ventilated soffit located  
above the terminal within a horizontal distance  
of 2 feet (61 cm) from the center line of the terminal

*

*

E=

Clearance to unventilated soffit

*

*

F=

Clearance to outside corner

*

*

G=

Clearance to inside corner

*

*

H=

Clearance to each side of center line extended above 
meter/regulator assembly

3 feet (91 cm) with a height 15 feet (4.5 m) above  

the meter/regulator assembly

*

I=

Clearance to service regulator vent outlet

3 feet (91 cm)

*

J=

Clearance to nonmechanical air supply inlet to building or 
the combustion air inlet to any other appliance

6 inches (15 cm) for appliances =/< 10,000 Btuh (3 kw),  
12 inches (30 cm) for appliances > 10,000 Btuh (3 kw)  
and =/< 100,000 Btuh (30 kw),  
36 inches (91 cm) for appliances > 100,000 Btuh (30 kw)

4 feet (1.2 m) below or to side of opening;  

1 foot (300 m) above opening

K=

Clearance to a mechanical air supply inlet

6 feet (1.83m)

3 feet (91 cm) above if within  

10 feet (3m) horizontally

L=

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

7 feet (2.13 m) †

7 feet (2.13 m)

M=

Clearance under veranda, porch, deck, or balcony

12 inches (30 cm) ‡

*

Notes:
 1. In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code.
 2. In accordance with the current ANSI Z223.1/NFPA 54 National Fuel Gas Code. 
†. A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwelling and serves both dwellings.
‡. Pemitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
 * Clearance in accordance with local installation codes and the requirements of the gas supplier and the manufacturer's Installation Instructions.

Table 12

Direct Vent Terminal Clearances

Canadian Installations

US Installations

A=

Clearance above grade, veranda, porch, deck, 
or balcony

12 inches (30 cm)

12 inches (30 cm)

B=

Clearance to window or door that may be 
opened

6 inches (15 cm) for appliances =/< 10,000 Btuh (3 kw),  
12 inches (30 cm) for appliances > 10,000 Btuh (3 kw)  
and =/< 100,000 Btuh (30 kw),  
36 inches (91 cm) for appliances > 100,000 Btuh (30 kw)

6 inches (15 cm) for appliances =/< 10,000 Btuh (3 kw),  
9 inches (23 cm) for appliances > 10,000 Btuh (3 kw)  
and =/< 50,000 Btuh (15 kw),  
12 inches (30 cm) for appliances > 50,000 Btuh (15 kw)

C=

Clearance to permanently closed window

*

*

D=

Vertical clearance to ventilated soffit located 
above the terminal within a horizontal distance 
of 2 feet (61 cm)  
from the center line of the terminal

*

*

E=

Clearance to unventilated soffit

*

*

F=

Clearance to outside corner

*

*

G=

Clearance to inside corner

*

*

H=

Clearance to each side of center line extended 
above meter/regulator assembly

3 feet (91 cm) with a height 15 feet (4.5 m) above the meter/

regulator assembly

*

I=

Clearance to service regulator vent outlet

3 feet (91 cm)

*

J=

Clearance to nonmechanical air supply inlet to 
building or the combustion  
air inlet to any other appliance

6 inches (15 cm) for appliances =/< 10,000 Btuh (3 kw),  
12 inches (30 cm) for appliances > 10,000 Btuh (3 kw)  
and =/< 100,000 Btuh (30 kw),  
36 inches (91 cm) for appliances > 100,000 Btuh (30 kw)

6 inches (15 cm) for appliances =/< 10,000 Btuh (3 kw),  
9 inches (23 cm) for appliances > 10,000 Btuh (3 kw)  
and =/< 50,000 Btuh (15 kw), 12 inches (30 cm) for appliances > 
50,000 Btuh (15 kw)

K=

Clearance to a mechanical  
air supply inlet

6 feet (1.83m)

3 feet (91 cm) above if within 10 feet (3m) horizontally

L=

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

7 feet (2.13 m) †

*

M=

Clearance under veranda,  
porch, deck, or balcony

12 inches (30 cm) ‡

*

Notes:
 1. In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code.
 2. In accordance with the current ANSI Z223.1/NFPA 54 National Fuel Gas Code. 
†. A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwelling and serves both dwellings.
‡. Pemitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
 * Clearance in accordance with local installation codes and the requirements of the gas supplier and the manufacturer's Installation Instructions.