Triangle Tube Prestige Solo
Model Number: 80-399
Prestige Solo condensing boiler, 95.0% AFUE, 16,000-399,000 BTU/hr range
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.
Discontinued: company ceased operations Nov 3, 2025. If you already own one, we can still service it where parts are available. For a new install, compare current Triangle Tube models or every brand's lineup.
Before buying or servicing a Triangle Tube boiler, confirm current parts and warranty support with the manufacturer or your supply house.
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
- 80-399
- Efficiency (AFUE)
- 95%
- Boiler Type
- Condensing Boiler
- Fuel
- natural gas/propane
- Venting
- PVC/CPVC/PP/SS
- BTU Input Range
- 16k - 399k BTU
- Domestic Hot Water
- indirect-ready
- In Production
- No — company ceased operations Nov 3, 2025
- Parts Warranty
- 2 years standard / 5 years with registration
- Heat Exchanger Warranty
- 10 years
Specifications sourced from the manufacturer spec sheet, checked Sep 27, 2026.
About the Triangle Tube Prestige Solo
The Triangle Tube Prestige Solo from Triangle Tube is listed at 95% AFUE in a condensing configuration.
This condensing boiler extracts additional heat from exhaust gases that would otherwise be lost, achieving rated efficiency above 90%. Real-world fuel use depends on return-water temperature, sizing, piping, controls, weather, maintenance, and household demand.
Triangle Tube backs this boiler with 2 years standard / 5 years with registration parts coverage and 10 years on the heat exchanger.
Sizing & Installation Notes
Condensing boilers like the Prestige Solo 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 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
2 years standard / 5 years with registration
Heat Exchanger
10 years
Our Guarantee
100% Satisfaction
Boiler installations by Home+ Air & Heat include our 1-year workmanship warranty, covering labor and any installation-related issues.
Compare the Triangle Tube Lineup
| Model | Efficiency | BTU Range | Fuel | Heat Exchanger Warranty |
|---|---|---|---|---|
| Prestige Solo (this model) | 95% AFUE | 16k - 399k BTU | natural gas/propane | 10 years |
| Prestige Solo 110 | 96% AFUE | 40k - 110k BTU | — | 10 years |
| Prestige Excellence | 95% AFUE | 60k - 175k BTU | natural gas/propane | 10 years |
| Instinct Solo | 95% AFUE | 16k - 199k BTU | natural gas/propane | 10 years |
| Challenger | 95% AFUE | 24k - 123k BTU | natural gas/propane | 10 years |
| Instinct Combi | 95% AFUE | 16k - 199k BTU | natural gas/propane | 10 years |
See the full Triangle Tube brand page for lineup context, or browse the Best Condensing Boilers guide to compare across brands.
Frequently Asked Questions
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