Efficiency Statements - A.O. Smith AO-WH-SOFT-350 Owner's Manual

This product is efficiency rated according to NSF/ANSI 44. The stated efficiencies are valid
only at the specified salt dosage and 7.0 gpm (26.5 L/min):
MODEL
AO-WH-SOFT-350
AO-WH-SOFT-400T
An efficiency-rated water softener is a demand-initiated regeneration softener that
also complies with specific performance specifications intended to minimize the
amount of regenerant brine and water used in its operation.
Efficiency-rated water softeners shall have a rated salt efficiency of not less than
3,350 grains of total hardness exchange per pound of salt (based on NaCI equivalency)
(477 grams of total hardness exchange per kilogram of salt), and shall not deliver
more salt than its listed rating.
Efficiency is measured by a laboratory test described in NSF/ANSI 44. The test represents
the maximum possible efficiency that the system can achieve. Operational efficiency is
the actual efficiency achieved after the system has been installed. It is typically less than
the efficiency due to individual application factors including water hardness, water
usage, and other contaminates that reduce the softeners' capacity.
Reduction Capabilities for Specific Contaminants
NAME OF
SUBSTANCE
Barium
Radium 226/228
Salt and Capacity Range
MODEL
AO-WH-SOFT-350
AO-WH-SOFT-400T
RATED EFFICIENCY
5,210 grains / lb
(742 grams / kg)
5,210 grains / lb
(742 grams / kg)
USEPA MAX.
CONTAMINANT
LEVEL
2.0 mg / L
5 pCi / L
MINIMUM
CAPACITY/SALT
5,210 grains / 1 lb
6,510 grains / 1.25 lbs

EFFICIENCY STATEMENTS

SALT DOSAGE
1 lb (0.45 kg)
1.25 lbs (0.57 kg)
INFLUENT CHALLENGE LEVEL
10 +/- 10% mg / L
226 / 228: 25 pCi / L
MIDDLE
CAPACITY/SALT
28,775 grains / 8 lbs
28,180 grains / 7 lbs
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CAPACITY
AT THAT DOSAGE
5,210 grains
(338 grams)
6,510 grains
(422 grams)
MAXIMUM
CAPACITY/SALT
35,000 grains / 15 lbs
40,000 grains / 13 lbs
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