U37 Regency ULTIMATE Rear Vent Direct Vent
Vertical Termination
24"
D
E
V
Inside corner detail
G 
V
A
Vertical
Termination
24"
18"
V
Freestanding Gas Heater
B
V
M
.
C
| V | Fixed |
|
| Closed |
F | V | Openable |
|
B
V
Openable
B
Fixed Closed
| H |
V |
|
B | N |
|
L
B
B
V | K | A |
| j | |
|
| |
| A |
|
V
A
V
Vent terminal
A | Air supply outlet |
| Area where terminal is not permited |
|
|
|
|
7
A= Clearance above grade, veranda, porch, deck, or balcony *(min. 12"/30cm) | H= Not to be installed above a meter/regulator assembly within | ||
B= Clearance to window or door that may be opened *(12"/30cm) #(9"/23cm) |
| (3'/90cm) horizontally from the centerline of the regulator. | |
C= Clearance to permanently closed window *(min. 12"/30cm) | J= | Clearance to service regulator vent outlet *(min. 36"/90cm) | |
D= Vertical clearance to ventilated soffit located above the terminal within a horizontal | K= | Clearance to | |
| distance of (24"/60cm) from the centerline of the terminal (min. 22"/55cm) check with |
| or the combustion air inlet to any other appliance *(12"/30cm) #(9"/23cm) |
| local code. | L= | Clearance to a mechanical air supply inlet *(min. 72"/1.8m) |
E= | Clearance to unventilated soffit (min. 12"/30cm) |
| #3' (91cm) above if within 10' (3m) horizontally. |
F= | Clearance to outside corner (12"/30cm) | M= **Clearance above paved sidewalk or a paved driveway located | |
G= Clearance to inside corner (12"/30cm) |
| on public property *(min. 84"/2.1m) | |
|
| N= Clearance under veranda, porch, deck, or balcony *(min. | |
|
|
| 12"/30cm)*** |
| Note: * As specified in CGA B149 Installation Code. Note: Local codes or | regulations may require different clearances. | |
| **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 of two sides beneath the floor. | ||
| # In accordance with the current ANSI Z223.1/NFPA 54, National Gas Code |
| |
