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BOILER
MODEL
Input
NUMBER
(1)
(3)
Mbh
15C-8D
262
15C-9D
299
Input rating for sea level to 2,000 ft. (610m) above sea level.
†
• United States, over 2000 ft (610m) above sea level. Reduce input rate 4% for every 1000 ft (304m) above sea
level.
+ Heating Capacity based on D.O.E. (Department of Energy) test procedure.
Add model number suffix 'P' for Propane.
(1)
Net AHRI Water rating shown based on piping and pickup allowance of 1.15. Consult manufacturer before selecting
(2)
boiler for installations having unusual piping and pickup requirements, such as intermittent system operation,
extensive piping systems, etc.
Mbh = 1,000 Btuh = British Thermal Unit Per Hour
(3)
- Ratings marked "Net AHRI Ratings" indicate amount of remaining heat input used to heat radiation or terminal units.
Net AHRI Ratings shown are based on allowance of 1.15 in accordance with factors shown on AHRI Standard as
published by The Hydronics Institute.
- Selection of boiler size should be based upon "Net AHRI Rating" being equal to or greater than calculated heat loss of
the building.
- Consult manufacturer before selecting boiler for installations having unusual piping and pickup requirements.
BOILERS FOR USE AT HIGH ALTITUDE
Boiler is factory equipped for use at altitudes of 0-2,000 feet above sea level.
For use at altitudes above 2,000 feet above sea level, input ratings are reduced by change in main burner orifice size.
For altitudes above 2,000 feet above sea level, input ratings should be reduced at rate of 4% for each 1,000 feet above
sea level. Consult National Fuel Gas Code, ANSI Z223.1/NFPA 54, or manufacturer for correct orifice sizing information.
In Canada, a high altitude conversion kit is available to convert to altitudes of 2,000 to 4,500 feet above sea level. Please
consult your dealer.
17 - BOILER RATINGS AND CAPACITIES
16 - BOILER RATINGS AND CAPACITIES
Table 2 - Ratings and Capacities
† NATURAL GAS
(2)
*HIGH
NET AHRI
ALTITUDE
Heating
RATING
INPUT
Capacity
Water,
(3)
Mbh
(3)
Mbh
(3)
Mbh
236
221
192
269
252
219
† PROPANE GAS
HEATING
NET AHRI
INPUT
CAPACITY
(3)
Mbh
RATING
(3)
Mbh
245
208
181
280
237
206
28
AFUE
INTERMITTENT
IGNITION WITH
VENT DAMPER
84.0
84.0
PN 240013340 Rev. C [12/02/2022]
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