ETi 400 High Efficiency Pool and Spa Heater Installation and User’s Guide
Rev. A 9/2016
30
CAUTION
Chemicals should not be stored near the heater installation. Combustion air can be contaminated by corrosive
chemical fumes which can void the warranty.
Corrosive Vapors and Possible Causes
COMBUSTION AIR SUPPLY
(CONTINUED)
NOTE
Each 90-degree elbow reduces the maximum horizontal PVC air intake duct run by 12 feet and each
45-degree elbow in the PVC air intake duct run reduces the maximum run by 6 feet. See the Table 5 on
page 28 for the maximum lengths using 90-degree elbows.
Area
Likely Contaminants
Chlorinated
swimming
pools and spas
Pool or spa cleaning chemicals. Acids, such as hydrochloric or muriatic acid.
New construction
and remodeling
areas
Glues and cements, construction adhesives, paints, varnishes, and paint and varnish
strippers. Waxes and cleaners containing calcium or sodium chloride.
Beauty parlors
Permanent wave solutions, bleaches, aerosol cans containing chlorocarbons or
fluorocarbons.
Refrigeration plants
or various industrial
finishing and
processing plants
Refrigerants, acids, glues and cements, construction adhesives.
Dry cleaning and
laundry areas
Bleaches, detergents, or laundry soaps containing chlorine. Waxes and cleaners
containing chlorine, calcium or sodium chloride.
Table 5.
Section 2: Installation Instructions
