Venting clearances – A.O. Smith 960 through 967 User Manual
Page 8
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BTH S E R V I C E H A N D B O O K
I N S T A L L A T I O N
VENTING CLEARANCES
This illustrates the exterior clearances for these BTH units when installed as direct vent heaters.
N O T E : 24 inches between inlet and outlet is a MINIMUM. Greater distance is recommended.
In colder climates increasing the 24” minimum to a maximum practical distance will reduce the
possibility of frost over from side winds blowing exhaust vapors into the air intake.
BTH MODEL 120
BTH MODEL 150-199
PLUMBING VENT
ROOF BOOT
(TVP. BOTH PIPES) 24* MIN
A SB; 12° ABOVE ROOF OR
SNOW ACCUMULATION LEVEL
BTH MODEL 250
SIDE WALL
EXHAUST
VENT
TERMINAL
INTAKE
VENT^
TERMINAL
—] II
--J II
1! i
-JU
iL_«
n II
■ —*1
II
PLUMBING VENT
ROOF BOOT
(TYP. BOTH PIPES) 24
EXHAUST
VENT
TERMINAL
A & B ; 12* ABOVE ROOF OR
SNOW ACCUMULATION LEVEL
A. O. Smith Water Products Co.
Ashland City, Tennessee © 2004
Technical Training Department
TC-044 Revision 6