9
TABLE 4 – HEATING RATING TABLE -- NATURAL GAS & PROPANE
Units Gas Heat
AL/SS HEAT EXCHANGER
TEMP RISE
(DEG F)
THERMAL
EFFICIENCY
(%)
AFUE
(%)
INPUT / OUTPUT
STAGE 1 (MBH)
INPUT / OUTPUT
STAGE 2 (MBH)
Single Phase
04
LOW 50 / 41 72 / 59 25 --- 55 82% 81%
MED 82 / 66 115 / 93 55 --- 85 80% 80%
HIGH --- --- --- --- ---
05
LOW 50 / 41 72 / 59 25 --- 55 82% 81%
MED 82 / 66 115 / 93 35 --- 65 81% 80%
HIGH 120 / 96 150 / 120 50 --- 80 80% 80%
06
LOW 50 / 41 72 / 59 20 --- 55 82% 81%
MED 82 / 66 115 / 93 30 --- 65 81% 80%
HIGH 120 / 96 150 / 120 40 --- 80 80% 80%
Three Phase
04
LOW 50 / 41 72 / 59 25 --- 55 82% N/A
MED 82 / 66 115 / 93 55 --- 85 80% N/A
HIGH --- --- --- --- ---
05
LOW 50 / 41 72 / 59 25 --- 55 82% N/A
MED 82 / 66 115 / 93 35 --- 65 81% N/A
HIGH 120 / 96 150 / 120 50 --- 80 80% N/A
06
LOW 50 / 41 72 / 59 20 --- 55 82% N/A
MED 82 / 66 115 / 93 30 --- 65 81% N/A
HIGH 120 / 96 150 / 120 40 --- 80 80% N/A
07
LOW 50 / 41 72 / 59 15 --- 55 82% N/A
MED 90 / 73 125 / 103 20 --- 50 82% N/A
HIGH 105 / 84 150 / 120 30 --- 60 81% N/A
08
LOW 90 / 73 125 / 103 20 --- 50 82% N/A
MED 120 / 98 180 / 148 35 --- 65 82% N/A
HIGH 180 / 147 224 / 184 45 --- 75 82% N/A
09
LOW 90 / 73 125 / 103 20 --- 50 82% N/A
MED 120 / 98 180 / 148 30 --- 65 82% N/A
HIGH 180 / 147 224 / 184 40 --- 75 82% N/A
NOTES:
Heat ratings are for natural gas heat exchangers o perated at or below 2000 ft (610 m). For information on Pro pane or alti-
tudes above 2000 ft (610 m), see the Application Data section of this book. Accessory Pro pane/High Altitude kits are also
available.
In the USA the input rating for altitudes above 2000 ft (610m) must be derated by 4% for each 1000 ft (305 m) above sea
level. In Canada, t he input r ating must be derated by 10% for altitudes of 2000 ft (610 m) to 4500 ft (1372 m) above s ea level.
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