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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 HIGH LIMIT SWITCH

HIGH LIMIT SWITCH

HYDROTHERM:02-3928
SKU: HYDROTHERM:02-3928
$71.78
Picture of HNET 2.0 TO 3.0 CONVERSION KIT

HNET 2.0 TO 3.0 CONVERSION KIT

HYDROTHERM:75-00559-001
SKU: HYDROTHERM:75-00559-001
$2,621.02
Picture of HNET 2.0 TO 3.0 CONVERSION KIT

HNET 2.0 TO 3.0 CONVERSION KIT

HYDROTHERM:75-00559-002
SKU: HYDROTHERM:75-00559-002
$2,621.02
Picture of HNET BOARD (3.0)

HNET BOARD (3.0)

HYDROTHERM:75-0570-002
SKU: HYDROTHERM:75-0570-002
$1,363.72
Picture of HYDROTHERM BM-1510 BURNER REBUILD KIT FOR KN-10 BOILER

HYDROTHERM BM-1510 BURNER REBUILD KIT FOR KN-10 BOILER

HYDROTHERM:BM-1510
SKU: HYDROTHERM:BM-1510
$3,660.52
Picture of HYDROTHERM CONTROL BOARD

HYDROTHERM CONTROL BOARD

HYDROTHERM:02-4293
SKU: HYDROTHERM:02-4293
$1,626.07
Picture of HYDROTHERM MESH BURNER

HYDROTHERM MESH BURNER

HYDROTHERM:70-6674
SKU: HYDROTHERM:70-6674
$430.65
Picture of HYDROTHERM PULSE PURGE FAN W/GASKET

HYDROTHERM PULSE PURGE FAN W/GASKET

HYDROTHERM:BM-7132
SKU: HYDROTHERM:BM-7132
$912.04
Picture of HYDROTHERM VALVE DIAPHRAG KIT (11 PCS)

HYDROTHERM VALVE DIAPHRAG KIT (11 PCS)

HYDROTHERM:BM-7097
SKU: HYDROTHERM:BM-7097
$44.55
Picture of IGNITER (NORTON)

IGNITER (NORTON)

HYDROTHERM:50072
SKU: HYDROTHERM:50072
$40.84