34000 Autry Street, Livonia, MI 48150 | 800.968.5530 | Fax 734.419.0209 | www.hamiltonengineering.com | LIT91127US REV 5/2018
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VENTING
B. VENTING THE EVO
(TABLE 4-1) VENTING SPECIFICATIONS
(TABLE 4-2) EQUIVALENT FEET
Fittings or Piping
Equivalent Feet
90 degree elbow
5'
45 degree elbow
3'
Coupling
0
Air inlet elbow
6'
Exhaust coupling
1'
The inlet and exhaust pipes on the top of the cabinet should be the diameter and material indicated in the Venting
Specifications Table above. It is very important that you plan the location properly to eliminate long pipe runs and
excessive fittings. Inlet pipe size must not be reduced.
Do not combine the inlet air or exhaust with any other inlet
or exhaust pipe including either to an additional similar appliance, unless you have purchased an engineered
Common Venting System from Hamilton Engineering, Inc.
The joints must be properly cleaned, primed and
cemented if plastic, and sealed per the manufacturer’s instructions if stainless. The piping must also be properly
supported as per Local and National Standard Plumbing Codes. It is important that the piping must be clean and
free from burrs, debris, ragged ends and particles of PVC (if applicable).
Model
Vent
Diameter
Standard Vent
Type
Optional Vent
Type
Minimum Combined
Vent Length
Maximum Combined
Length
HW 79
3"
Plastic
Stainless
6' + (2) 90º elbows
250'
HW 129
3"
Plastic
Stainless
6' + (2) 90º elbows
200'
HW 179
3"
Plastic
Stainless
6' + (2) 90º elbows
160'
HW 199.1
3"
Plastic
Stainless
6' + (2) 90º elbows
90'
HW 299
4"
Plastic
Stainless
6' + (2) 90º elbows
225'
HW 399
4"
Plastic
Stainless
6' + (2) 90º elbows
180'
HW 599
5"
Stainless
Plastic - 6"*
6' + (2) 90º elbows
200'
*The use of 6" PVC will require the purchase of a
special adapter from Hamilton Engineering, Inc.