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This is a manufacturer's specification and certification plate for a low-pressure boiler system produced by Advanced Thermal Hydronics (ATH). The boiler is model KN-6 with configuration KN6WW and serial number 91746101, certified under ANS Z21.13-2014 CSA 4 9-2014 standards and AHRI certified.

The unit is a direct vent boiler equipped for natural gas input, with specifications including minimum inlet gas pressure of 2 inches water column (4.98 pounds per column foot) and maximum pressure of 14 inches water column (34.84 pounds per column foot). Operating at elevations from 0 to 6,000 feet, the boiler provides maximum input of 600,000 BTU/176 kW with minimum input of 20,000 BTU/44 kW. The useful output is rated at 556,200 BTU/163 kW maximum and 102,000 BTU/37 kW minimum. The unit has an electrical rating of 120V/1Ph/60Hz with a maximum amperage of 6 amps. The boiler is certified for maximum water temperature of 250°F (121°C) at 100 PSI/689 kPa working pressure, with minimum relief valve capacity of 510 LBS/HR per 150 kW. The plate was glued on 06/25/15 per revision 42-2997 Rev 0.