Smith 88 Installation And Operation Instructions Manual page 28

Table 11.3: Boiler Ratings
Heating Capacity³
Boiler Input,
Model MBH
Steam,
MBH
88 88.5
118 118.0
147 147.5
177 177.0
206 206.5
236 236.0
288 287.5
1. Net I=B=R Ratings are based on DOE Heating Capacity less an allowance for normal piping and pickup as determined by
the Testing and Rating Standard for Low Pressure Cast Iron Heating Boilers of the Hydronics Institute. Steam ratings are
based on a piping and pickup factor of 1.33. Consult manufacturer before selecting a boiler for gravity hot water installations
or for installations having unusual piping and pickup requirements such as exposed piping, night set back, etc. Ratings shown
are for elevations up to 2,000 feet. For elevations above 2,000 feet, ratings should be reduced at the rate of 4% for each
1,000 feet above sea level.
2. Heating Capacity and Annual Fuel Utilization Efficiency (AFUE) ratings are based on U.S. Government tests. Before
purchasing this appliance, read important information about its estimated annual energy consumption or energy efficiency
rating that is vailable from your retailer.
NOTE: Minimum Inlet Gas Pressure: Natural Gas @ 5.0 in. W.C.², LP Gas @ 11.0 in. W.C.
Exceptions: 177 BTU STDG 5.3"
288 BTU STDG 5.5"
288 BTU SPRK 5.3"
28
INSTALLATION AND OPERATING INSTRUCTIONS
Net I=B=R Ratings¹
Steam,
sqft
74 233
98 308
123 383
147 458
171 533
196 613
238 746
Standing Pilot Spark Ignition
AFUE³
Steam, Steam,
MBH %
56 80.6
74 81.2
92 80.6
110 81.0
128 80.7
147 80.9
179 80.7
Water
Content
AFUE³
Steam,
Steam,
%
gal
83.0
9.3
82.6
9.3
82.6
10.8
82.4
10.8
82.3
12.4
82.2
12.4
82.0
13.9
Approx.
Shipping
Weight,
lb
465
465
576
576
700
700
812