4
New York City MEA Number 484-84 E Vol. IV.
The Ratings marked “Net I=B=R Ratings” indicate the
amount of remaining heat input that can be used to heat
the radiation units. The net I=B=R Ratings shown are
based on an allowance of 1.15 in accordance with the
factors shown on the I=B=R Standard as published by
the Hydronics Institute. Selection of boiler size should
be based upon “Net I=B=R Rating” being equal to or
greater than the calculated heat loss of the building.
The Manufacturer should be consulted before selecting a
boiler for installations having unusual piping and pickup
requirements.
Boilers For Use At High Altitude
This boiler is factory equipped for use at altitudes of
0-2,000 feet above sea level. For use at altitudes above sea
level, the input ratings are reduced by a change in main
orifi ce size.
For altitudes above 2,000 feet above sea level, input
ratings should be reduced at the rate of 4% for each 1,000
feet above sea level. Consult the latest edition of the
National Fuel Gas Code (NFPA54/ANSI Z223.1) for correct
orifi ce sizing information. High altitude orifi ces are available
from the boiler manufacturer.
Number of Boiler
Sections
Natural or Propane Gas Dimensions
Input *MBH
Heating Capacity
*MBH+
Net I=B=R
Rating *MBH
Flue
Diameter
Dim. A
3 70 57 50 5" 11-1/4"
4 105 85 74 6" 14-1/2"
5 140 113 98 6" 17-3/4"
6 175 142 123 7" 21"
7 210 170 148 7" 24-1/4"
8 245 198 172 7" 27-1/2"
9 280 226 197 7" 30-3/4"
* MBH = 1,000 BTUH = British Thermal Unit Per Hour. Boilers are equipped for altitudes up to 2,000 feet only.
For altitudes above 2,000 feet, ratings should be reduced at the rate of 4% for each 1,000 feet above sea level.
+ Heating Capacity based on D.O.E. (Department of Energy) test procedure.
BOILER RATINGS AND CAPACITIES
Table 1- Boiler Ratings and Capacities
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