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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 REAR SECTION

REAR SECTION

HYDROTHERM:01-1627-1
SKU: HYDROTHERM:01-1627-1
$1,089.00
Picture of MIDDLE SECTION

MIDDLE SECTION

HYDROTHERM:01-1628
SKU: HYDROTHERM:01-1628
$991.24
Picture of FRONT SECTION

FRONT SECTION

HYDROTHERM:01-1629
SKU: HYDROTHERM:01-1629
$1,054.35
Picture of UPPER CASTING COVER

UPPER CASTING COVER

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

INLET ADAPTER CASTING

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

7 SMOKEHOOD W/GASKET & SCREWS

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

HEATER COVER PLATE W/SKIM TAPPING

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

6 SMOKEHOOD W/GASKET & SCREWS

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

GAS VALVE NG/LP*

HYDROTHERM:02-1540
SKU: HYDROTHERM:02-1540
$394.76
Picture of GAS VALVE NG/LP*

GAS VALVE NG/LP*

HYDROTHERM:02-1543
SKU: HYDROTHERM:02-1543
$289.58