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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 AIR SWITCH

AIR SWITCH

HYDROTHERM:GX-82662
SKU: HYDROTHERM:GX-82662
$163.35
Picture of AIR SWITCH

AIR SWITCH

HYDROTHERM:GX-82906
SKU: HYDROTHERM:GX-82906
$154.69
Picture of AIR VENT

AIR VENT

HYDROTHERM:13-00402-001
SKU: HYDROTHERM:13-00402-001
$199.24
Picture of AUTO SWITCH

AUTO SWITCH

HYDROTHERM:58-1554
SKU: HYDROTHERM:58-1554
$8.66
Picture of BALL VALVE

BALL VALVE

HYDROTHERM:84-01308-007
SKU: HYDROTHERM:84-01308-007
$290.81
Picture of BALL VALVE

BALL VALVE

HYDROTHERM:84-01308-008
SKU: HYDROTHERM:84-01308-008
$414.56
Picture of BAROMETRIC DRAFT CONTROL

BAROMETRIC DRAFT CONTROL

HYDROTHERM:03-2609
SKU: HYDROTHERM:03-2609
$75.49
Picture of BASE ASSEMBLY

BASE ASSEMBLY

HYDROTHERM:7800
SKU: HYDROTHERM:7800
$472.72
Picture of BASE ASSEMBLY

BASE ASSEMBLY

HYDROTHERM:7801
SKU: HYDROTHERM:7801
$720.22
Picture of BASE ASSEMBLY

BASE ASSEMBLY

HYDROTHERM:7803
SKU: HYDROTHERM:7803
$756.11