Innovation Water Heaters
– Edge [i] Controller
Venting and Combustion Air Design Guide
TAG-0090_A
•
GF-5056
•
2/20/2020
Technical Support
•
(800) 526-0288
•
Mon-Fri, 8 am - 5 pm EST Page 5 of 39
1.4.
Certified Venting Materials for Flue Pipe Systems
Innovation Water Heaters are a Category II and IV or Type BH appliance, which require special
attention to exhaust venting and combustion air details. The exhaust vent MUST be UL listed for
use with Category II and IV appliances. Consult local codes and authorities prior to installation.
The following vent materials are allowed:
• Category II or IV UL1738 or Type BH under ULCS636 listed Polypropylene and
Stainless-Steel
• Where codes allow, PVC and CPVC may be used.
• AERCO recommends the use of AL29-4C Stainless Steel and Polypropylene as the
preferred venting material for all Innovation Water Heaters.
• Stainless Steel venting thickness should conform to the following requirements:
TABLE 1: Flue System Minimum Thickness for AL29-4C in Inches (mm)
Diameter
3” to 8”
(51
– 203 mm)
9” to 16”
(229
– 406 mm)
18” to 24”
(457
– 610 mm)
26” to 30”
(660
– 762 mm)
Material Thickness
in Inches (mm)
0.015
(0.38)
0.020
(0.51)
0.024
(0.61)
0.034
(0.86)
It is the responsibility of the design engineer and installing contractor to ensure all vent system
designs and installations follow industry best practices, including proper pitch, support, and
drainage to prevent failure. While UL is the industry standard guideline for venting, It is highly
recommended that exhaust vent passing through confined or enclosed building spaces be made
of AL29-4C Stainless Steel as the most corrosion resistant vent material currently available.
Proper clearances to combustibles must be maintained per UL and vent manufacturer
requirements. The UL, National Fuel Gas Code (ANSI Z223.1/ NFPA54) and CSA B149.1-10
guidelines are often the basis for state and local codes. AERCO's recommendations follow the
guidelines of these agencies, unless more stringent codes govern the installation site. The venting
and combustion air systems must meet all applicable code requirements.
All Canada installations must comply with CSA B149.1 installation code.
CAUTION!
•
The Vent Pipe Systems below are used for venting gas burning Category II and IV
appliances. Do not use these vent pipe systems for venting appliances burning fuels such
as wood, coal, oil or kerosene.
•
Maintain clearances from combustible construction for heater, vent connector, and steam
and hot-water pipes.
•
Do not use these vent pipe systems for incinerators of any kind.
