The Triangle Tube brand has been discontinued by the manufacturer as of 11/3/2025. Suggested replacement units will be available on our website and replacement parts will continue to be available as supplies last. If you'd like any further assistance, please contact our customer service team.
Keystone Condensing Water Heaters produce high volume hot water in with high energy efficiency. With 4 models with inputs from 199 to 500 MBH the Keystone Condensing Water Heaters are perfectly sized for large residential and light commercial applications. These products feature a stainless steel heat exchanger with a thermal efficiency between 95 and 97%. Their compact design minimizes floor space while the cabinet provides easy access to all components. The large user friendly control interface makes set-up easy. The advanced control modulates the water heater with a 5 to 1 turndown ratio. Up to 8 water heaters can be joined in a cascade while the control features parallel modulation and water heater rotation to maximize efficiency and service life.
Features:
| Fuel Type: | Natural Gas Propane |
|---|---|
| Efficiency: | 97% |
| System Type: | Water |
| Water Connection: | 1-1/4" |
| Gas Connection: | 1/2" |
| Air Intake: | 3" |
| Vent Diameter: | 3" |
| BTU Input: | 199000 |
| BTU Output: | 193030 |
| Height (Inches): | 38" |
| Width (Inches): | 24-1/2" |
| Depth (Inches): | 26" |
| Features: | Condensing EI/Spark Ignition |
A remote storage tank is not required with this boiler, but you can connect an indirect water heater to it in order to provide domestic hot water.