Search

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.

View as Grid List
Sort by
Display per page
Picture of BM-1535 REPLACEMENT FREQUENCY DRIVE KIT

BM-1535 REPLACEMENT FREQUENCY DRIVE KIT

HYDROTHERM:BM-1535
SKU: HYDROTHERM:BM-1535
$2,509.65
Picture of BM-2042 UNIVERSAL BLOCK

BM-2042 UNIVERSAL BLOCK

HYDROTHERM:BM-2042
SKU: HYDROTHERM:BM-2042
$2,965.05
Picture of BM-2043 UNIVERSAL BLOCK

BM-2043 UNIVERSAL BLOCK

HYDROTHERM:BM-2043
SKU: HYDROTHERM:BM-2043
$3,504.60
Picture of BM-2044 UNIVERSAL BLOCK

BM-2044 UNIVERSAL BLOCK

HYDROTHERM:BM-2044
SKU: HYDROTHERM:BM-2044
$4,104.79
Picture of BM-2045 UNIVERSAL BLOCK

BM-2045 UNIVERSAL BLOCK

HYDROTHERM:BM-2045
SKU: HYDROTHERM:BM-2045
$4,698.79
Picture of BM-2046 COMPLETE JACKET

BM-2046 COMPLETE JACKET

HYDROTHERM:BM-2046
SKU: HYDROTHERM:BM-2046
$512.33
Picture of BM-2047 COMPLETE JACKET

BM-2047 COMPLETE JACKET

HYDROTHERM:BM-2047
SKU: HYDROTHERM:BM-2047
$551.92
Picture of BM-2048 COMPLETE JACKET

BM-2048 COMPLETE JACKET

HYDROTHERM:BM-2048
SKU: HYDROTHERM:BM-2048
$591.53
Picture of BM-2672 BASE PAN

BM-2672 BASE PAN

HYDROTHERM:BM-2672
SKU: HYDROTHERM:BM-2672
$199.24
Picture of BM-2673 BASE PAN

BM-2673 BASE PAN

HYDROTHERM:BM-2673
SKU: HYDROTHERM:BM-2673
$217.80