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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 GX-83950 BURNER CERAMIC DISC

GX-83950 BURNER CERAMIC DISC

HYDROTHERM:GX-83950
SKU: HYDROTHERM:GX-83950
$48.26
Picture of HARNESS (J14) TRANSFORMER

HARNESS (J14) TRANSFORMER

HYDROTHERM:70-2043
SKU: HYDROTHERM:70-2043
$40.84
Picture of HARNESS (J2) CTRL

HARNESS (J2) CTRL

HYDROTHERM:70-2074
SKU: HYDROTHERM:70-2074
$150.98
Picture of HARNESS (J3) CTRL

HARNESS (J3) CTRL

HYDROTHERM:70-2075
SKU: HYDROTHERM:70-2075
$185.63
Picture of HARNESS (J4) IGNITION/FLUE SWITCH

HARNESS (J4) IGNITION/FLUE SWITCH

HYDROTHERM:70-2076
SKU: HYDROTHERM:70-2076
$37.13
Picture of HARNESS (J4) IGNITION/FLUE SWITCH

HARNESS (J4) IGNITION/FLUE SWITCH

HYDROTHERM:70-2081
SKU: HYDROTHERM:70-2081
$73.01
Picture of HARNESS (J4) VFD

HARNESS (J4) VFD

HYDROTHERM:70-2036
SKU: HYDROTHERM:70-2036
$9.90
Picture of HARNESS (J5) BLOWER/GAS VALVE

HARNESS (J5) BLOWER/GAS VALVE

HYDROTHERM:70-2077
SKU: HYDROTHERM:70-2077
$82.91
Picture of HARNESS (J5) BLOWER/GAS VALVE

HARNESS (J5) BLOWER/GAS VALVE

HYDROTHERM:70-2077.1
SKU: HYDROTHERM:70-2077.1
$40.84
Picture of HARNESS (J5) CTRL

HARNESS (J5) CTRL

HYDROTHERM:70-2037
SKU: HYDROTHERM:70-2037
$19.80