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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 01-1640 UPPER CASTING COVER

01-1640 UPPER CASTING COVER

HYDROTHERM:01-1640
SKU: HYDROTHERM:01-1640
$147.26
Picture of 01-1651 INLET ADAPTER CASTING

01-1651 INLET ADAPTER CASTING

HYDROTHERM:01-1651
SKU: HYDROTHERM:01-1651
$118.80
Picture of 01-3545 7 SMOKEHOOD W/GASKET & SCREWS

01-3545 7 SMOKEHOOD W/GASKET & SCREWS

HYDROTHERM:01-3545
SKU: HYDROTHERM:01-3545
$148.50
Picture of 01-3579 HEATER COVER PLATE W/SKIM TAPPING

01-3579 HEATER COVER PLATE W/SKIM TAPPING

HYDROTHERM:01-3579
SKU: HYDROTHERM:01-3579
$99.00
Picture of 01-3668 6 SMOKEHOOD W/GASKET & SCREWS

01-3668 6 SMOKEHOOD W/GASKET & SCREWS

HYDROTHERM:01-3668
SKU: HYDROTHERM:01-3668
$123.75
Picture of 02-1540 GAS VALVE NG/LP* VR8200H1129

02-1540 GAS VALVE NG/LP* VR8200H1129

HYDROTHERM:02-1540
SKU: HYDROTHERM:02-1540
$394.76
Picture of 02-1552 GAS VALVE NG

02-1552 GAS VALVE NG

HYDROTHERM:02-1552
SKU: HYDROTHERM:02-1552
$392.29
Picture of 02-1553 GAS VALVE LP

02-1553 GAS VALVE LP

HYDROTHERM:02-1553
SKU: HYDROTHERM:02-1553
$421.99
Picture of 02-1554 Hydrotherm 02-1554 Gas Valve 24V For Natural Gas For MR And VGA Boilers

02-1554 Hydrotherm 02-1554 Gas Valve 24V For Natural Gas For MR And VGA Boilers

HYDROTHERM:02-1554
SKU: HYDROTHERM:02-1554
$384.86
Picture of 02-1555 GAS VALVE LP

02-1555 GAS VALVE LP

HYDROTHERM:02-1555
SKU: HYDROTHERM:02-1555
$313.09