Product Guide

Flow rate is determined by temperature rise. To determine your temperature rise, subtract the incoming water temperature from
the set output temperature. All units are factory set to 120°F or 122°F but can be changed.
Temperature Rise vs. Gallons per Minute
Temp
Rise
KJr2/
110U/
110C
K4/
310U/
310C
D2/
510U/
510C
H3M H3J H3S H3/540P CT-199 M50
30°
6.6 8.0 10.0 6.6 6.6 8.0 10.0 10.0 14.5
35°
6.6 8.0 9.3 6.4 6.6 8.0 10.0 10.0 14.5
40°
5.7 7.8 8.1 5.6 6.6 8.0 9.5 9.5 14.5
45°
5.1 6.9 7.2 5.0 6.6 7.6 8.4 8.4 13.5
50°
4.6 6.2 6.5 4.5 6.1 6.8 7.6 7.6 12.2
55°
4.2 5.7 5.9 4.1 5.5 6.2 6.9 6.9 11.1
60°
3.8 5.2 5.4 3.7 5.1 5.7 6.3 6.3 10.1
65°
3.5 4.8 5.0 3.4 4.7 5.3 5.8 5.8 9.4
70°
3.3 4.4 4.7 3.2 4.3 4.9 5.4 5.4 8.7
75°
3.1 4.1 4.3 3.0 4.1 4.6 5.0 5.0 8.1
80°
2.9 3.9 4.1 2.8 3.8 4.3 4.7 4.7 7.6
85°
2.7 3.7 3.8 2.6 3.6 4.0 4.4 4.4 7.2
90°
2.5 3.5 3.6 2.5 3.4 3.8 4.2 4.2 6.8
95°
2.4 3.3 3.4 2.3 3.2 3.6 4.0 4.0 6.4
100°
2.3 3.1 3.3 2.2 3.0 3.4 3.8 3.8 6.1
FLOW RATE GUIDE
Example of Hunter Curves for
Sizing Large Applications
Comparison of Flow Rates vs.
Temperature Rise
400
375
350100
75
50
25
200
175
150
125
300
275
250
225 325
0
100
80
60
90
70
50
10
20
30
40
0
Fixture Units
Gallons Per Minute
Restaurants
Hospitals, Nursing Homes,
Dormitories, Hotels & Motels
Apartments & Houses
Office Buildings & Schools
Temperature Rise (°F)
Flow Rate (gpm)
140120100806040200
16
14
12
10
2
4
6
8
0
M50 D2/510U/510C H3/540P and CT-199
H3S K4/310U/310C
KJr2/110U/110C
H3J
H3M
9