The Keystone Boiler is a high efficiency, gas fired condensing unit that is available both as a boiler and as a water heater.
The Keystone Boiler is available in the following sizes:
- KS399: Input 80 – 399 MBH
- KS500: Input 100 – 500 MBH
- KS600: Input 120 – 600 MBH
- KS750: Input 150 – 750 MBH
- KS850: Input 170 – 850 MBH
The Keystone Water Heater is available in the following sizes: