BLOWER SIZING ENGINEERING DATA
HORSEPOWER
To Get This Horsepower Horsepower Horsepower Horsepower
Divide This
By This
Kwatts Watts
0.746
746
Torque (ft. lbs.) X RPM Torque (ft. lbs.) X RPS
33000
550
Horsepower required to pump water at a given rate to a given Height, assuming 100% eff. AKA Water Horsepower
GPM x TDH (ft.)
3960
GPH X TDH (psi)
103000
Brake HP
Water HP
Pump eff.
AIR BLOWER SIZING GUIDE
JETS ONLY RECOMMENDED NUMBER OF JETS
MAXIMUM INCHES OF WATER DEPTH
BLOWER MOTOR SIZE
VOLTS
AMPS
1 HP
120V 120V 120V 240V 240V 240V
6.6 7.4 9.3 3.9 4.3 5.0
35 in. 45 in. 55 in. 30 in. 40 in. 50 in.
5–10 9–15 12–17
1-1/2 HP
2 HP 1 HP
4–9
1-1/2 HP
8–13
2 HP
12–17
BLOWER SIZING FORMULA
Measure total depth of water in spa (not total spa depth)
Add - 1 in. water for each 10 ft. of 2 in. air pipe
Add 1/2 in. water for each 90 deg. 2 in. elbow
Compare your total with maximum inches of water column and select that size or the next size higher blower than your total, in your selected voltage. The number of holes in the air channel (both floor and seat) should be approximately 1.6 sq. in. total plus or minus .5 1/8 in. hole = .0123 sq. in. 3/16 in. hole = .0276 sq. in. 5/32 in. hole = .0192 sq. in. 1/4 in. hole = .0491 sq. in.
538
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