Boiler Manual
13b Ratings
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| (Note 5) |
Table 7 | Boiler ratings |
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Boiler | DOE | Net | Boiler | DOE | Vent | ||||
model | Heating | Input | Output | Input | Output | I=B=R | water | Seasonal | size |
number | capacity | ratings | content | efficiency |
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| (Btuh) | (Btuh) | (Btuh) | (Btuh) | (Btuh) | (Btuh) | (gallons) | (% AFUE) |
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(Note 1) | (Note 2) |
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| (Note 5) | (Note 4) |
57,000 | 67,000 | 57,300 | 60,300 | 51,600 | 50,000 | 1.5 | 85.3 | 3" | |
(Note 5) |
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85,000 | 100,000 | 85,000 | 90,000 | 76,500 | 74,000 | 2.1 | 84.6 | 3" | |
112,000 | 133,000 | 112,400 | 119,000 | 100,600 | 97,000 | 2.7 | 84.0 | 3" | |
140,000 | 167,000 | 140,300 | 150,300 | 126,300 | 122,000 | 3.3 | 83.4 | 3" |
Notes 1. Add “PIN” for natural gas boiler - “PIL” for propane gas boiler.
2.Based on standard test procedures prescribed by the United States Department of Energy.
3.Net I=B=R ratings are based on net installed radiation of sufficient quantity for the requirements of the building and nothing need be added for normal piping and pickup. Ratings are based on a piping and pickup allowance of 1.15. An additional allowance should be
made for unusual piping and pickup loads.
4.CGs boilers require special venting, consistent with Category III or IV boiler. Use only the vent materials and methods specified in CGs vent supplements. CGs boilers may be
5.As an Energy Star Partner,
CGs boilers for residential radiant panel systems, converted gravity heating systems or other low water temperature applications should be installed with balancing valves and bypass piping equal to the supply and return size to avoid excessive flue gas condensation due to lower operating water temperatures. For alternate piping, contact your
Part number | 59 |