Crown Boiler Bermuda
Model Number: BSI103-276
A chimney-vented cast-iron gas steam boiler rated 82% AFUE, offered from 103,000 to 276,000 BTU/hr.
Technical Specifications
Source: manufacturer spec sheet · checked Sep 27, 2026
Prices depend on sizing, venting and piping in your home, so we quote every installation.
Sizing: the right size comes from a room-by-room heat-loss calculation, not the size of the old boiler or a rule of thumb. Oversized boilers short-cycle and waste fuel; steam systems are sized to the connected radiation instead. See how we approach boiler installation.
Home-Specific Operating Cost Review
No guaranteed annual savings or payback period
Historical Use
Fuel consumption and weather
Current Rates
Utility and delivered-fuel prices
System Design
Load, piping, controls, and temperatures
Full Specifications
- Model Number
- BSI103-276
- Efficiency (AFUE)
- 82%
- Boiler Type
- Steam Boiler
- Fuel
- natural gas
- Venting
- chimney
- BTU Input Range
- 103k - 276k BTU
- Domestic Hot Water
- no
- In Production
- Yes
- Parts Warranty
- 2 years
- Heat Exchanger Warranty
- 12 years
Specifications sourced from the manufacturer spec sheet, checked Sep 27, 2026.
Ideal For
Older Long Island homes with one-pipe or two-pipe steam radiators that need a like-for-like steam boiler replacement.
Expert Review: Crown Boiler Bermuda
The Crown Bermuda is a cast-iron gas steam boiler rated 82% AFUE, with sizes from 103,000 to 276,000 BTU/hr. It is chimney-vented and designed for residential steam systems, which remain common in older Long Island homes. Like all steam boilers it does not produce domestic hot water directly; an indirect tank or separate water heater is needed.
Key Features & Technology
Cast-iron steam boiler
82% AFUE
103,000–276,000 BTU/hr range
Chimney vented
Designed for residential steam systems
Advantages
- Purpose-built for steam, not a converted hot water design
- Size range covers most residential steam loads
- 12-year heat exchanger warranty
Considerations
- 82% AFUE is typical for steam but well below condensing hot water boilers
- No domestic hot water capability
Sizing & Installation Notes
Steam boilers like the Bermuda are sized to the connected radiation — we measure every radiator's EDR rating and match the boiler's steam output to that total, plus piping pickup allowance. Square footage rules of thumb don't apply to steam.
Every Crown Boiler installation starts with a free in-home assessment covering the heat-loss calculation, venting and chimney condition, gas or oil supply sizing, and permit requirements for your town. Learn more about our boiler installation process and steam boiler installation, or see current rebate and incentive programs that may apply.
Warranty & Protection
Parts Warranty
2 years
Heat Exchanger
12 years
Our Guarantee
100% Satisfaction
All Crown Boiler boiler installations by Home+ Air & Heat include our 1-year workmanship warranty, covering labor and any installation-related issues.
Compare the Crown Boiler Lineup
| Model | Efficiency | BTU Range | Fuel | Heat Exchanger Warranty |
|---|---|---|---|---|
| Bermuda (this model) | 82% AFUE | 103k - 276k BTU | natural gas | 12 years |
| Bermuda BWC | 87% AFUE | 42k - 252k BTU | — | 20 years |
| Mega-Flex | 85% AFUE | 42k - 175k BTU | — | 20 years |
| Aruba | 82% AFUE | 70k - 196k BTU | — | 20 years |
| Velocity Phantom-X | 95% AFUE | 8k - 210k BTU | natural gas/propane | 12 years |
| Aruba 5 | 84% AFUE | 70k - 295k BTU | natural gas/propane | 12 years |
| Bimini BWC | 95% AFUE | 30k - 300k BTU | natural gas/propane | 15-year limited |
| Freeport 2 | 86% AFUE | 91k - 158k BTU | oil | 12 years |
| Freeport CT | 85% AFUE | 105k - 196k BTU | oil | limited lifetime |
| Tobago | 86% AFUE | 91k - 158k BTU | oil | 12 years |
| Tobago (TWZ) | 86.1% AFUE | 70k - 210k BTU | oil | 12-yr limited |
| Cayman | 83.5% AFUE | 103k - 379k BTU | natural gas | limited lifetime; verify current Cayman terms |
| Phantom II | 95% AFUE | 8k - 180k BTU | natural gas/propane | 12-year limited |
| Phantom II Combi | 95% AFUE | 14k - 200k BTU | natural gas/propane | 12-year limited |
| Velocity Phantom Combi | 95% AFUE | 16k - 199k BTU | natural gas/propane | 12-year limited |
| Bali | 84% AFUE | 61k - 229k BTU | natural gas | 12 years |
| Bermuda (BSI) | 82.5% AFUE | 69k - 380k BTU | natural gas/propane | 12-yr limited |
| Freeport 2 (FSZ) | 83.3% AFUE | 80k - 160k BTU | natural gas/propane | 12-yr limited |
| Kingston (KSZ) | 85.4% AFUE | 59k - 176k BTU | oil | 12-yr limited |
| Cabo 2 | 84% AFUE | 83k - 245k BTU | natural gas/propane | 12 years |
| Aruba | 83.3% AFUE | 38k - 280k BTU | natural gas/propane | limited lifetime |
See the full Crown Boiler brand page for lineup context, or browse the Best Steam Boilers 2027 guide to compare across brands.
Frequently Asked Questions
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