Innovation Water Heaters
– Edge [i] Controller
Venting and Combustion Air Design Guide
TAG-0090_A
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GF-5056
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2/20/2020
Technical Support
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(800) 526-0288
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1.
CODES, SAFETY & VENTING SYSTEMS
1.1.
Introduction
The AERCO gas-fired water heater is a high efficiency, forced draft, domestic hot water heating
unit with unique venting capabilities. All venting options (which include horizontal and vertical
discharges, direct vent, and manifolded vent breeching), typically exceed the capabilities of
competing combustion equipment. These and other features enable AERCO water heaters to
provide extremely high thermal efficiencies and optimum temperature control under widely varying
conditions. It is therefore critical that the flue gas vent and combustion air system be designed to
maintain these objectives.
The high efficiency is achieved through air/fuel modulation and the release of heat energy from
the moisture condensing in the combustion products. Because condensation can occur in the
exhaust vent system, a means must be provided to remove the moisture accumulation. Each
model should be fitted with the supplied condensate removal trap.
The design guidelines in this bulletin provide broad latitude while meeting the objectives of safety,
longevity and optimum performance.
1.2.
Applicable Federal Codes
UNITED STATES:
NFPA
54/ANSI Z223.1……….. National Fuel Gas Code
NFPA/ANSI 211………………. Chimneys, Fireplaces, Vents and Solid Fuel Burning
Appliances
CANADA:
CSA B149.1…………………… Installation Codes for Gas-Burning Equipment
CSA B149.2…………………… Installation Codes for Gas-Burning Equipment
The above listed codes contain information for gas vented appliances requiring Category II, III
and IV, vent sizing, location, air space clearances to combustibles and safe installation practices.
The gas vent installer must be in compliance with the above codes, as well as Local Codes and
Regulations.
WARNING!
ALL INSTALLATIONS OF WATER HEATERS AND VENTING SHOULD BE DONE ONLY BY
QUALIFIED VENTING SYSTEMS PERSONNEL AND IN ACCORDANCE WITH THE
MANUFACTURER’S RECOMMENDATIONS. INSTALLING OR VENTING A HEATER OR
ANY OTHER GAS APPLIANCE WITH IMPROPER METHODS OR MATERIALS MAY
RESULT IN SERIOUS INJURY OR DEATH DUE TO FIRE OR TO ASPHYXIATION FROM
POISONOUS GASES (CARBON MONOXIDE IS ODORLESS AND INVISIBLE).
