Specifications

9
A. O. Smith Water Products Service Handbook
Ashland City, Tennessee 2005
©
Training Department
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GENESIS II VENTING
GENESIS 1000-2500 MODELS
The Genesis boiler may be individually vented vertically up to 35 feet without a barometric damper.
Individual vents with an overall height of more than 35 feet require a barometric. Properly sized vent
material and the use of a barometric damper (when required) will lead to proper vent operation. A
barometric damper is required when draft exceeds -0.04 inches water column. When installed and
adjusted properly, a barometric damper will maintain draft between -0.02" and -0.04" W.C... ensuring
proper operation. Recommend to use "Fan Assisted" tables in NFGC to size vent - Category I.
Inches mm
GW/B-1000 10 254 70
GW/B-1300 12 305 70
GW/B-1500
12 305 70
GW/B-1850 14 355 40
GW/B-2100 14 355 40
GW/B-2500 16 406 40
Kits contain AL-29-4C vent material.
Horizontal Venting Information Table
Model Heater
Vent size
Room Air Intake + Single
Exhaust Vent Pipe Max.
Equivalent Feet
A 90° elbow = 10 equivalent feet of pipe; a 45° elbow = 5 equivalent feet.