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Hydrotherm

KN-Series Condensing Cast Iron Boilers from Advanced Thermal Hydronics (Hydrotherm) are the one and only high efficiency cast iron boiler ever made and offer an industry leading 25 year heat exchanger warranty. KN-Series Boilers combine the efficiency of condensing, gas-fired technology with the strength, durability and heat retention of time-tested cast iron construction. From raw materials to the state-of-the-art digital control system, the complete line of KN-Series products is proudly manufactured at the ATH facility in Boyertown, Pennsylvania. Utilizing decades of foundry and manufacturing expertise, KN-Series boilers are cast, machined, wired and assembled to the tightest standards possible resulting in a finished product that is all-American in terms of innovation, reliability and craftsmanship. Models available from 200,000 - 4,000,000 BTU/h.

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Picture of 6122 JACKET ASSEMBLY

6122 JACKET ASSEMBLY

HYDROTHERM:6122
SKU: HYDROTHERM:6122
$785.81
Picture of 6123 JACKET ASSEMBLY

6123 JACKET ASSEMBLY

HYDROTHERM:6123
SKU: HYDROTHERM:6123
$832.84
Picture of 6124 JACKET ASSEMBLY

6124 JACKET ASSEMBLY

HYDROTHERM:6124
SKU: HYDROTHERM:6124
$869.96
Picture of 6125 JACKET ASSEMBLY

6125 JACKET ASSEMBLY

HYDROTHERM:6125
SKU: HYDROTHERM:6125
$935.55
Picture of 6126 JACKET ASSEMBLY

6126 JACKET ASSEMBLY

HYDROTHERM:6126
SKU: HYDROTHERM:6126
$942.97
Picture of 62-3327 PILOT ORIFICE (LP)

62-3327 PILOT ORIFICE (LP)

HYDROTHERM:62-3327
SKU: HYDROTHERM:62-3327
$8.66
Picture of 62-3668 Hydrotherm 62-3668 Natural Gas Pilot Assembly (Honeywell Q3451B1103)

62-3668 Hydrotherm 62-3668 Natural Gas Pilot Assembly (Honeywell Q3451B1103)

HYDROTHERM:62-3668
SKU: HYDROTHERM:62-3668
$50.74
Picture of 66-00103-001 CLEAR RTV SEALANT

66-00103-001 CLEAR RTV SEALANT

HYDROTHERM:66-00103-001
SKU: HYDROTHERM:66-00103-001
$53.21
Picture of 7 VENT DAMPER

7 VENT DAMPER

HYDROTHERM:02-5837
SKU: HYDROTHERM:02-5837
$363.83
Picture of 7 VENT DAMPER

7 VENT DAMPER

HYDROTHERM:02-5877
SKU: HYDROTHERM:02-5877
$336.60