U.S. Boiler Company · Independence
U.S. Boiler Company Independence IN8I
The U.S. Boiler Company Independence IN8I is the second-largest chimney-vented size: 245 MBH input with 202 MBH DOE heating capacity and a 152 MBH AHRI net steam rating at 82.2% AFUE, chimney vented (7×15 in chimney).
Key figures
- Max input
- 245 MBH
- Max CSA output
- —
- AFUE
- 82.2 %
- Min input
- —
Input is gas energy consumed; output is heat delivered. Never size from input alone.
U.S. Boiler Company Independence IN8I in practice
The Independence IN8I is a cast-iron gas steam boiler rated at 245 MBH input. Its row in the Independence Product Data Sheet (Form HYDL07084) prints 202 MBH DOE heating capacity, a 152 MBH AHRI net steam rating (1.333 piping and pickup allowance), 633 steam square feet and 82.2% AFUE.
This is a chimney-vented model using a fuel-saving vent damper and a low-profile rear drafthood, requiring a 7×15 in chimney round chimney 15 feet minimum height and shipping at approximately 690 lb in Packaged, Semi-Pak or Knock-Down configuration. Base standard equipment includes the flame roll-out switch, blocked vent switch, probe-type LWCO and 15 PSI safety valve, with maximum working pressure of 15 PSI steam.
Boilers.ca documents this size at model level from the Independence Product Data Sheet and links the published submittal form. Steam, gas and venting work belongs with a licensed contractor. No official Canadian-sales statement was found, so canadianStatus stays 'unknown'.
Best suited to
- 245 MBH residential steam loads
- Homes with an existing 7×15 chimney
- Owners comparing Independence chimney and PV options by size
Applicability and support
- Model number
- IN8I
- Canadian availability
- unknown
- Production status
- current
- ROMA supplies
- Confirmed at consultation
- ROMA services
- Confirmed at consultation
- Warranty
- Not verified
Where ROMA provides on-site service
On-site service is currently offered in Greater Vancouver, BC, including Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Port Coquitlam, Port Moody, Delta, Langley, Maple Ridge, Abbotsford, Chilliwack, White Rock, Pitt Meadows, Tsawwassen, Anmore, Lions Bay, Belcarra, Bowen Island, Mission. Everything else on this site is reference information you can use anywhere in Canada.
Specifications
Published specifications
Values as published by U.S. Boiler Company. Units are shown with every value; notes flag conflicting sources or missing figures.
| Specification | Value | Note |
|---|---|---|
| Input | ||
| Input | 245 MBH | Maximum input per the Independence Product Data Sheet ratings table (sea level to 2,000 ft; reduce four percent per 1,000 ft above that, up to 5,000 ft, U.S. only). |
| Output | ||
| DOE heating capacity | 202 MBH | DOE heating capacity per the Independence Product Data Sheet ratings table. |
| AHRI net steam rating | 152 MBH | AHRI net steam rating per the Independence Product Data Sheet, based on a piping and pickup allowance of 1.333. |
| Steam square feet | 633 sq ft | Steam square feet per the Independence Product Data Sheet ratings table. |
| Efficiency | ||
| Efficiency (AFUE) | 82.2 % | AFUE per the Independence Product Data Sheet ratings table. |
| Domestic hot water | ||
| Domestic hot water | Heating-only boiler — domestic hot water comes from a separate indirect tank or water heater | |
| Venting and air | ||
| Minimum chimney requirements | 7×15 in chimney | Round chimney diameter and height measured from top of drafthood to top of chimney per the Independence Product Data Sheet. |
| Venting | Chimney vented with vent damper and low-profile rear drafthood | Chimney-vented models use a fuel-saving vent damper and low-profile rear drafthood; blocked vent switch and flame roll-out switch are standard. |
| Physical and connections | ||
| Approx. shipping weight | 690 lb | Approximate shipping weight per the Independence Product Data Sheet ratings table. |
| Operating limits and other | ||
| Available configurations | Packaged, Semi-Pak and Knock-Down | Independence boilers are available as Packaged, Semi-Pak and Knock-Down; EZ connect trim sets are available separately for Semi-Pak and Knock-Down. |
| Fuel | Natural gas; LP conversion kits available on IN3–IN9 chimney-vented models | LP conversion kits are available on the IN3I–IN9I chimney-vented models per the ratings table note. |
Manuals
Alerts documented for this model
None documented yet.
Frequently asked questions
What are the Independence IN8I's ratings?
245 MBH input, 202 MBH DOE heating capacity, a 152 MBH AHRI net steam rating (633 sq ft of steam) and 82.2% AFUE per the Independence Product Data Sheet.
Can the Independence IN8I be converted to LP gas?
Yes — the ratings table notes LP conversion kits are available on the chimney-vented IN3I–IN9I models.
Questions about the U.S. Boiler Company Independence IN8I?
Describe what the boiler is doing and get a straight answer about the next step.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Compare and explore
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- Independence series hub
- Buying guide
Sources and verification
- U.S. Boiler Company — Independence Gas-Fired Steam Boiler product page · accessed September 9, 2026
- Independence Series Product Data Sheet, Form HYDL07084 (PDF) · HYDL07084 · accessed September 9, 2026
- Independence Series Submittal Form (PDF) · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.