15
WHL-060 REV. 1.6.16
D. RESIDENTIAL GARAGE INSTALLATION
If the water heater is located in a residential garage, per ANSI Z223.1:
Mount the bottom of the water heater
a minimum of 18” above the floor of the garage, to ensure the burner and ignition
devices are well off the floor.
Locate or protect the water heater so it cannot be damaged by a moving vehicle.
E. EXHAUST VENT AND INTAKE PIPE
Vents must be properly supported. The water heater exhaust and intake connections are not designed to carry heavy weight. Vent
support brackets must be within 1’ of the water heater and the balance at 4’ intervals. Venting must be readily accessible for visual
inspection for the first 3’ from the water heater.
You must also install air intake piping from outdoors to the water heater flue adaptor. The resultant installation is categorized as direct
vent (sealed combustion).
NOTE:
To prevent combustion air contamination, see Table 9 in this section when considering exhaust vent and intake pipe
termination.
Exhaust vent and intake pipe may be vented vertically through the roof or out a side wall. Venting methods are detailed in the Venting
Section. Do not attempt installation using any other means. Be sure to locate the water heater so exhaust vent and intake piping can be
routed through the building and properly terminated. Exhaust vent and intake piping lengths, routing, and termination method must
comply with methods and limits given in the venting section.
F. PREVENT COMBUSTION AIR CONTAMINATION
Install intake piping for the water heater as described in the Venting section. Do not terminate exhaust in locations that can allow
contamination of intake air.
Ensure that the intake air will not contain any of the contaminants below. For example, do not pipe intake near a swimming pool. Avoid
areas subject to exhaust fumes from laundry facilities. These areas always contain contaminants. Contaminated air will damage the
water heater, resulting in possible substantial property damage, severe personal injury, or death.
PRODUCTS TO AVOID
AREAS LIKELY TO HAVE CONTAMINANTS
Spray cans containing fluorocarbons
Dry cleaning/laundry areas and establishments
Permanent wave solutions
Swimming pools
Chlorinated waxes/cleaners
Metal fabrication plants
Chlorine-based swimming pool chemicals
Beauty shops
Calcium chloride used for thawing
Refrigeration repair shops
Sodium chloride used for water softening
Photo processing plants
Refrigerant leaks
Auto body shops
Paint or varnish removers
Plastic manufacturing plants
Hydrochloric or Muriatic acid
Furniture refinishing areas and establishments
Cements and glues
New building construction
Antistatic fabric softeners used in clothes dryers
Remodeling areas
Chlorine-type bleaches, laundry detergents, and cleaning solvents
Garages and workshops
Adhesives used to fasten building products
Table 9
NOTE: DAMAGE TO THE WATER HEATER CAUSED BY EXPOSURE TO CORROSIVE VAPORS IS NOT COVERED BY
WARRANTY.
(Refer to the limited warranty for complete terms and conditions).
