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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 BURNER GASKET KITS

BURNER GASKET KITS

HYDROTHERM:75-00579-006
SKU: HYDROTHERM:75-00579-006
$162.11
Picture of THERMISTER   150/200

THERMISTER 150/200

HYDROTHERM:GX-82671
SKU: HYDROTHERM:GX-82671
$160.88
Picture of NORTON IGNITER SYSTEM TO CRYSTAL TECHNICA

NORTON IGNITER SYSTEM TO CRYSTAL TECHNICA

HYDROTHERM:21-1500
SKU: HYDROTHERM:21-1500
$159.64
Picture of IGNITER WITH BRACKET (CRYSTAL TECHNICA)

IGNITER WITH BRACKET (CRYSTAL TECHNICA)

HYDROTHERM:70-1049
SKU: HYDROTHERM:70-1049
$159.64
Picture of 4 FLUE ADAPTER

4 FLUE ADAPTER

HYDROTHERM:56-3345
SKU: HYDROTHERM:56-3345
$159.64
Picture of 1/4 NPT WATER PRESSURE SWITCH (150 ASME/200 AFTER 2/1/08)

1/4 NPT WATER PRESSURE SWITCH (150 ASME/200 AFTER 2/1/08)

HYDROTHERM:GX-83218
SKU: HYDROTHERM:GX-83218
$158.40
Picture of GAS VALVE NG

GAS VALVE NG

HYDROTHERM:02-1556
SKU: HYDROTHERM:02-1556
$158.40
Picture of AIR SWITCH

AIR SWITCH

HYDROTHERM:GX-82906
SKU: HYDROTHERM:GX-82906
$154.69
Picture of MANIFOLD LIMIT  150/200

MANIFOLD LIMIT 150/200

HYDROTHERM:GX-82659
SKU: HYDROTHERM:GX-82659
$153.45
Picture of IGNITOR NG/LP

IGNITOR NG/LP

HYDROTHERM:BM-8681
SKU: HYDROTHERM:BM-8681
$153.45