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OUTPUT TEMPERATURE CHART
These charts are based on properly sized gas lines and installation at 0-2,000 ft (0-610 m). The water heater will
de-rate approximately 4% per 1,000 ft (305 m) of elevation increase above 2,000 ft (914 m).
To reduce the risk of scalding, install Thermostatic Mixing Valves (temperature limiting valves) at each point of
use.
Output Temperature vs. GPM (Max. 6.6 GPM) with Various Inlet Water temperature
240HX3
Set temp.°F(°C)
Output Temperature vs. GPM (Max. 8.0 GPM) with Various Inlet Water temperature
340HX3
Set temp.°F(°C)
Output Temperature vs. GPM (Max. 10.0 GPM) with Various Inlet Water temperature
540HX3
Set temp.°F(°C)
8.0
6.0
4.0
2.0
0.0
100
105
110
(38)
(40)
(43)
5.1
4.7
4.3
40°F (4°C)
(19.2)
(17.7)
(16.4)
6.1
5.5
5.1
50°F（10°C)
(23.0)
(20.9)
(19.2)
6.6
6.6
6.1
60°F（16°C)
(25.0)
(25.0)
(23.0)
6.6
6.6
6.6
70°F（21°C)
(25.0)
(25.0)
(25.0)
10.0
8.0
6.0
4.0
2.0
0.0
100
105
110
(38)
(40)
(43)
5.7
5.3
4.9
40°F（4°C)
(21.6)
(19.9)
(18.5)
6.8
6.2
5.7
50°F（10°C)
(25.9)
(23.5)
(21.6)
8.0
7.6
6.8
60°F（16°C）
(30.3)
(28.8)
(25.9)
8.0
8.0
8.0
70°（21°C)
(30.3)
(30.3)
(30.3)
12.0
10.0
8.0
6.0
4.0
2.0
0.0
100
105
110
(38)
(40)
(43)
6.3
5.8
5.4
40°F（4°C)
(23.9)
(22.0)
(20.4)
7.6
6.9
6.3
50°F（10°C）
(28.6)
(26.0)
(23.9)
9.5
8.4
7.6
60°F（16°C)
(35.8)
(31.8)
(28.6)
10.0
10.0
9.5
70°F（21°C)
(37.9)
(37.9)
(35.8)
63
40°F (4°C)
50°F（10°C)
115
120
125
(45)
(50)
(52)
4.1
3.8
3.6
(15.3)
(14.4)
(13.5)
4.7
4.3
4.1
(17.7)
(16.4)
(15.3)
5.5
5.1
4.7
(20.9)
(19.2)
(17.7)
6.6
6.1
5.5
(25.0)
(23.0)
(20.9)
40°F（4°C)
50°F（10°C)
60°F（16°C）
115
120
125
(45)
(50)
(52)
4.6
4.3
4.0
(17.3)
(16.2)
(15.2)
(14.4)
5.3
4.9
4.6
(19.9)
(18.5)
(17.3)
(16.2)
6.2
5.7
5.3
(23.5)
(21.6)
(19.9)
(18.5)
7.6
6.8
6.2
(28.8)
(25.9)
(23.5)
(21.6)
40°F（4°C)
50°F（10°C）
60°F（16°C)
115
120
125
130
135
(45)
(50)
(52)
(55)
(57)
5.0
4.7
4.4
4.2
4.0
(19.1)
(17.9)
(16.8)
(15.9)
(15.1)
5.8
5.4
5.0
4.7
4.4
(22.0)
(20.4)
(19.1)
(17.9)
(16.8)
6.9
6.3
5.8
5.4
5.0
(26.0)
(23.9)
(22.0)
(20.4)
(19.1)
8.4
7.6
6.9
6.3
5.8
(31.8)
(28.6)
(26.0)
(23.9)
(22.0)
Page
Owner's Guide
Output Temperature Chart
(L/M)
30
60°F（16°C)
70°F（21°C)
15
0
130
135
140
(55)
(57)
(60)
3.4
3.2
3.0
(12.8)
(12.1)
(11.5)
3.8
3.6
3.4
(14.4)
(13.5)
(12.8)
4.3
4.1
3.8
(16.4)
(15.3)
(14.4)
5.1
4.7
4.3
(19.2)
(17.7)
(16.4)
(L/M)
70°（21°C)
30
15
0
130
135
140
(55)
(57)
(60)
3.8
3.6
3.4
(13.6)
(12.9)
4.3
4.0
3.8
(15.2)
(14.4)
4.9
4.6
4.3
(17.3)
(16.2)
5.7
5.3
4.9
(19.9)
(18.5)
(L/M)
45
70°F（21°C)
30
15
0
140
150
160
(60)
(65)
(70)
3.8
3.4
3.2
(14.3)
(13.0)
(11.9)
4.2
3.8
3.4
(15.9)
(14.3)
(13.0)
4.7
4.2
3.8
(17.9)
(15.9)
(14.3)
5.4
4.7
4.2
(22.4)
(17.9)
(15.9)
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