 
Independence
Available in gas-fired steam or hot water, Burnham's Independence boiler is designed for installations where optimum steam performance is needed as is the case in older, steam heated buildings. Offered in a cast iron package, semi-pak, or knockdown model, the Independence is a perfect fit for new or replacement urban installations. Other notable features: natural draft, natural or LP gas, and 51 To 317 MBH capacity.
| Atmospheric Steam Boilers |
| AGA/CGA Boiler # |
Input MBH |
AFUE Water |
AFUE Steam |
Approx. Ship Wt. (lbs) |
Min. Recom. Chimney Size Dia.(In) x Ht.(Ft) |
| IN3 |
62 |
83.1 |
81.9 |
350 |
4 x 15 |
| IN4 |
105 |
83.1 |
82.0 |
420 |
5 x 15 |
| IN5 |
140 |
83.1 |
82.0 |
485 |
6 x 15 |
| IN6 |
175 |
83.2 |
82.1 |
555 |
6 x 15 |
| IN7 |
210 |
83.2 |
82.1 |
620 |
7 x 15 |
| IN8 |
245 |
83.2 |
82.2 |
690 |
7 x 15 |
| IN9 |
280 |
83.2 |
82.2 |
760 |
8 x 15 |
| IN10 |
315 |
83.5* |
82.5* |
815 |
8 x 15 |
| IN11 |
349 |
83.5* |
82.5* |
885 |
9 x 15 |
| IN12 |
385 |
83.5* |
82.5* |
955 |
9 x 15 |
* Combustion Efficieny
| Power Vented Steam Boilers |
| AGA Boiler # |
Input MBH |
DOE Heat. Cap. MBH |
I=B=R Steam Rating MBH |
I=B=R Steam Rating Sq Ft |
Max. Vent Len. Equiv. Ft |
AFUE % |
Approx. Ship. Wt |
| PIN3PV |
62 |
52 |
39 |
163 |
45 |
83.2 |
368 |
| PIN4PV |
105 |
87 |
65 |
271 |
35 |
82.2 |
438 |
| PIN5PV |
140 |
116 |
87 |
363 |
35 |
82.2 |
503 |
| PIN6PV |
175 |
145 |
109 |
454 |
35 |
82.2 |
573 |
Independence Information and Documentation
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