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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 GAS MANIFOLD

GAS MANIFOLD

HYDROTHERM:50979PB
SKU: HYDROTHERM:50979PB
$122.51
Picture of BURNER DOOR GASKET

BURNER DOOR GASKET

HYDROTHERM:GX-82770
SKU: HYDROTHERM:GX-82770
$121.27
Picture of 24V TRANSFORMER

24V TRANSFORMER

HYDROTHERM:GX-82457
SKU: HYDROTHERM:GX-82457
$118.80
Picture of INLET ADAPTER CASTING

INLET ADAPTER CASTING

HYDROTHERM:01-1651
SKU: HYDROTHERM:01-1651
$118.80
Picture of COVER, STEPPER MOTOR (10:1)

COVER, STEPPER MOTOR (10:1)

HYDROTHERM:03-00426-001
SKU: HYDROTHERM:03-00426-001
$117.56
Picture of GAS MANIFOLD

GAS MANIFOLD

HYDROTHERM:50266PB
SKU: HYDROTHERM:50266PB
$117.56
Picture of BASE REAR PANEL

BASE REAR PANEL

HYDROTHERM:61180PB
SKU: HYDROTHERM:61180PB
$117.56
Picture of FILTER BOX COVER

FILTER BOX COVER

HYDROTHERM:75-00222-001
SKU: HYDROTHERM:75-00222-001
$116.32
Picture of PILOT ASSEMBLY LP

PILOT ASSEMBLY LP

HYDROTHERM:BM-2695
SKU: HYDROTHERM:BM-2695
$116.32
Picture of SUPPLY/RETURN SENSOR

SUPPLY/RETURN SENSOR

HYDROTHERM:02-4284
SKU: HYDROTHERM:02-4284
$116.32