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Independence® Gas-Fired Boiler
DOE
AGA
HEATING
BOILER
INPUT
CAPACITY
NUMBER
MBH (1)
MBH (1)(2)
IN3
62
51
IN4
105
87
IN5
140
115
IN6
175
144
IN7
210
173
IN8
245
202
IN9
280
231
AGA/CGA
GROSS
OUTPUT
MBH
IN10(3)
315
259.87
IN11(3)
349
287.92
IN12
385
317.62
* LP available on IN3-IN9
1.
Ratings shown are for installations at sea level and elevations up to 2,000 ft. For elevations
above 2,000 ft., ratings should be reduced at the rate of four percent (4%) for each 1,000 ft.
above sea level.
2.
Capacities, outputs and ratings are based on steam combustion efficiency of 82.5%. Water
combustion efficiency is 83.5%.
3.
For Canadian builds only: Reduce input and output and by 3%.
4.
15 ft. height is measured from top of drafthood to top of chimney.
5.
IN6, IN8, & IN10 - Canada only: Increase chimney diameter by 1".
Working Pressure: 15 PSI Steam; 30 PSI Water
I=B=R RATING (2)
WATER
STEAM
STEAM
MBH
MBH
SQ. FT.
44
38
158
76
65
271
100
86
358
125
108
450
150
130
542
176
152
633
201
174
725
226
195
812
250
216
900
276
239
996
AFUE
24V
EI
WATER STEAM WATER STEAM
81.0
80.0
83.1
81.3
80.0
83.1
81.6
80.3
83.1
81.8
80.6
83.2
82.1
80.9
83.2
81.1
80.0
83.2
81.4
80.3
83.2
COMBUSTION EFFICIENCY (%)
WATER
STEAM
83.5
82.5
83.5
82.5
83.5
82.5
MINIMUM
RECOMMENDED
APPROX.
CHIMNEY SIZE
SHIPPING
ROUND
WEIGHT
Dia. (In.) x Ht.(Ft.)
(LBS.)
(4)(5)
81.9
350
4 x 15
82.0
420
5 x 15
82.0
485
6 x 15
82.1
555
6 x 15(5)
82.1
620
7 x 15
82.2
690
7 x 15(5)
82.2
760
8 x 15
815
8x15(5)
885
9x15
955
9x15
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