Keystone Boiler
Keystone Condensing Boilers provide powerful solutions for large residential and light commercial applications with 7 models with inputs from 399 to 1200 MBH. 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 boiler with a 5 to 1 turndown ratio. Up to 8 boilers can be joined in a cascade while the control features parallel modulation and boiler rotation to maximize efficiency and service life.
Warranty Info
10 Year Limited Warranty & 1 Year Limited Parts Triangle Tube hereby warrants the Keystone Condensing Boiler &/or Keystone Condensing Water Heater when properly registered with our factory at the time of purchase (as set forth below) to be free from defects in material or workmanship. Triangle Tube will repair or, at its option, replace the component part under the conditions explained in paragraph 4 , hereof.
Features and Benefits
-
7 Boiler models from 399 to 1,200 MBH
-
Stainless steel heat exchanger
-
ASME Stamped Heat Exchanger
-
Thermal efficiencies of up to 97%
-
Turndown ratios up to 10:1
-
Compact footprint
-
Boilers 500MBH and greater are CSD-1 compliant
-
Low Nox – 2012 SCAQMD Certified
-
Large color touch screen display
-
Cascade up to 8 units for a capacity of 4,800 MBH
-
Modbus protocol included for BAS integration
-
Average life span exceeds 20 years
Product/Marketing Literature
Product Comparison
| Boiler Model | Fuel | Input MBH | Thermal Efficiency % | Combustion Efficiency % | DOE Heating Capacity | Turndown Ratio | Net AHRI Rating MBH |
|---|---|---|---|---|---|---|---|
| KS 399 T | Natural Propane | 80 – 399 | 96.5 | 96.5 | 386 | 5 : 1 | 336 |
| KS 500 T | Natural Propane | 100 – 500 | 95.0 | 95.0 | 475 | 5 : 1 | 413 |
| KS 600 T | Natural Propane | 120 – 600 | 95.3 | 96.0 | 572 | 5 : 1 | 497 |
| KS 750 T | Natural Propane | 150 – 750 | 96.6 | 96.6 | 724 | 5 : 1 | 630 |
| KS 850 T | Natural Propane | 170 – 850 | 95.7 | 95.7 | 813 | 5 : 1 | 707 |
| KS 1000 T | Natural Propane | 100 – 1,000 | 94.2 | 94.2 | 942 | 10 : 1 | 819 |
| KS 1200 T | Natural Propane | 120 – 1,200 | 95.1 | 94.8 | 1120 | 10 : 1 | 974 |