E

N

G

I

N

E

E

R

I

N

G

D

A

T

A

616

ENGINEERING DATA

BLOWER SIZING

Kwatts

Torque (ft. lbs.) X RPM

GPM x TDH (ft.)

Water HP

120V

6.6

120V

9.3

240V

4.3

BLOWER SIZING FORMULA

HORSEPOWER

To Get This

Divide This

By This

Horsepower

Horsepower

Horsepower required to pump water

at a given rate to a given Height,

assuming 100% eff. AKA Water

Horsepower

Brake HP

0.746

33000

3960

Pump eff.

35 in.

5–10

55 in.

12–17

40 in.

8–13

Horsepower

Watts

746

Horsepower

Torque (ft. lbs.) X RPS

550

GPH X TDH (psi)

103000

AIR BLOWER SIZING GUIDE

BLOWER MOTOR SIZE

VOLTS

AMPS

MAXIMUM INCHES OF

WATER DEPTH

JETS ONLY

RECOMMENDED

NUMBER OF JETS

1 HP

1-1/2 HP

120V

7.4

45 in.

9–15

2 HP

1-1/2 HP

1 HP

240V

3.9

30 in.

4–9

2 HP

240V

5.0

50 in.

12–17

Measure total depth of water in spa (not total spa depth)

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.

1/8 in. hole = .0123 sq. in.

3/16 in. hole = .0276 sq. in.

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

The number of holes in the air channel (both floor and seat) should be

approximately 1.6 sq. in. total plus or minus .5

5/32 in. hole = .0192 sq. in.

1/4 in. hole = .0491 sq. in.