Guide To Pool Heating

Page 47 of 51

CONVERSION TABLE - II

INCHES OF MERCURY (Head in feet of water)

Inches Mercury

Feet of Head

Inches Mercury

Feet of Head

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

1.13
2.27
3.40
4.53
5.67
6.80
7.93
9.06
10.20
11.33
12.46
13.60
14.73
15.86
17.00

16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

18.13
19.26
20.39
21.53
22.66
23.79
24.93
26.06
27.19
28.33
29.46
30.59
31.72
32.86
33.99

COST OF RUNNING A MOTOR

@ 10 CENTS PER KILOWATT HOUR

Motor
HP

Hourly
Cost

8 Hour
Day

Cost Per
Week

Cost Per
Month

Cost Per
Six Mos.

Cost Per
Year

1/2
3/4
1
1 1/2
2
3

$.05
.075
.10
.15
.20
.30

$.40
.60
.80
1.20
1.60
2.40

$2.80
4.20
5.60
8.40
11.20
16.80

$12.13
18.20
24.36
36.40
48.53
72.80

$72.80
109.20
145.56
218.40
291.20
436.80

$145.60
218.40
291.12
436.80
582.40
873.60