Crown Boiler Bimini BWC
Model Number: BWC120-300
A condensing gas boiler with a cast-aluminum heat exchanger, direct venting, and a documented 15-year limited heat-exchanger warranty.
Technical Specifications
Source: manufacturer spec sheet · checked Sep 27, 2026
Some figures come from distributor listings and are still being verified against the manufacturer.
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
- BWC120-300
- Efficiency (AFUE)
- 95%
- Boiler Type
- Condensing Boiler
- Fuel
- natural gas/propane
- Venting
- PVC/CPVC/PP/SS
- BTU Input Range
- 30k - 300k BTU
- Domestic Hot Water
- indirect-ready
- In Production
- Yes
- Parts Warranty
- 1-year full
- Heat Exchanger Warranty
- 15-year limited
Specifications sourced from the manufacturer spec sheet, checked Sep 27, 2026.
Some figures come from distributor listings and are still being verified against the manufacturer.
Ideal For
Homeowners upgrading to high efficiency who want condensing savings with flexible, chimney-free venting.
Expert Review: Crown Boiler Bimini BWC
The Crown Bimini BWC is a condensing gas boiler family with a cast-aluminum heat exchanger, direct venting and model inputs from roughly 70,000 to 225,000 BTU/hr. Manufacturer literature documents condensing-class efficiency, natural-gas or propane operation, and compatibility with an indirect water heater. Coverage is listed as a one-year full boiler warranty and a 15-year limited heat-exchanger warranty, subject to the written warranty terms.
Key Features & Technology
Condensing gas operation
Cast-aluminum heat exchanger
Approximately 70,000–225,000 BTU/hr input range
Direct venting
Natural gas or propane
Indirect water-heater compatible
Advantages
- Condensing efficiency
- Chimney-free venting
- 15-year limited heat-exchanger warranty
Considerations
- Cast-aluminum heat exchanger requires water-quality and maintenance compliance
- Requires condensate drainage
- Exact AFUE and capacity vary by BWC model
Sizing & Installation Notes
Condensing boilers like the Bimini BWC reach their rated efficiency only when return water runs cool enough to condense flue gases. We check your radiation and design water temperatures so the unit actually condenses in your home, not just on the spec sheet.
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, or see current rebate and incentive programs that may apply.
Warranty & Protection
Parts Warranty
1-year full
Heat Exchanger
15-year limited
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 |
|---|---|---|---|---|
| Bimini BWC (this model) | 95% AFUE | 30k - 300k BTU | natural gas/propane | 15-year limited |
| 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 |
| 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 | 82% AFUE | 103k - 276k 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 Condensing Boilers guide to compare across brands.
Frequently Asked Questions
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