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 75-00577-003 CONVERSION KIT (NG TO LP)

75-00577-003 CONVERSION KIT (NG TO LP)

HYDROTHERM:75-00577-003
SKU: HYDROTHERM:75-00577-003
$126.23
Picture of 75-01733-001 CONDENSATE DRAIN ASSEMBLY (HIGH)

75-01733-001 CONDENSATE DRAIN ASSEMBLY (HIGH)

HYDROTHERM:75-01733-001
SKU: HYDROTHERM:75-01733-001
$384.86
Picture of 7802 BASE ASSEMBLY

7802 BASE ASSEMBLY

HYDROTHERM:7802
SKU: HYDROTHERM:7802
$727.65
Picture of 7956 INSULATION BOARD

7956 INSULATION BOARD

HYDROTHERM:7956
SKU: HYDROTHERM:7956
$35.89
Picture of 8 FLUE ADAPTER

8 FLUE ADAPTER

HYDROTHERM:56-3350
SKU: HYDROTHERM:56-3350
$459.11
Picture of 8 VENT DAMPER

8 VENT DAMPER

HYDROTHERM:02-5878
SKU: HYDROTHERM:02-5878
$344.02
Picture of 82-00405-003 HEATNET OVERLAY

82-00405-003 HEATNET OVERLAY

HYDROTHERM:82-00405-003
SKU: HYDROTHERM:82-00405-003
$91.57
Picture of 82-00405-004 HEATNET OVERLAY

82-00405-004 HEATNET OVERLAY

HYDROTHERM:82-00405-004
SKU: HYDROTHERM:82-00405-004
$91.57
Picture of 82-00475 KEYPAD

82-00475 KEYPAD

HYDROTHERM:82-00475
SKU: HYDROTHERM:82-00475
$50.74
Picture of 9 FLUE ADAPTER

9 FLUE ADAPTER

HYDROTHERM:56-3348
SKU: HYDROTHERM:56-3348
$481.39