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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 SHUTTER BOX & COVER ASSEMBLY

SHUTTER BOX & COVER ASSEMBLY

HYDROTHERM:75-00359-002
SKU: HYDROTHERM:75-00359-002
$3,208.84
Picture of SHUTTER BOX & COVER ASSEMBLY

SHUTTER BOX & COVER ASSEMBLY

HYDROTHERM:75-00359-003
SKU: HYDROTHERM:75-00359-003
$3,208.84
Picture of SHUTTER BOX & COVER ASSEMBLY

SHUTTER BOX & COVER ASSEMBLY

HYDROTHERM:75-00359-004
SKU: HYDROTHERM:75-00359-004
$3,124.69
Picture of SHUTTER BOX & COVER ASSEMBLY

SHUTTER BOX & COVER ASSEMBLY

HYDROTHERM:75-00359-005
SKU: HYDROTHERM:75-00359-005
$3,124.69
Picture of SHUTTER BOX & COVER ASSEMBLY

SHUTTER BOX & COVER ASSEMBLY

HYDROTHERM:75-00359-006
SKU: HYDROTHERM:75-00359-006
$3,123.45
Picture of SHUTTER BOX & COVER ASSEMBLY

SHUTTER BOX & COVER ASSEMBLY

HYDROTHERM:75-00359-007
SKU: HYDROTHERM:75-00359-007
$3,123.45
Picture of SIDE PANEL INSULATION

SIDE PANEL INSULATION

HYDROTHERM:45-1210
SKU: HYDROTHERM:45-1210
$9.90
Picture of SIGHT GLASS GASKET

SIGHT GLASS GASKET

HYDROTHERM:BM-9857
SKU: HYDROTHERM:BM-9857
$2.47
Picture of SIGHT GLASS SCREW

SIGHT GLASS SCREW

HYDROTHERM:61757
SKU: HYDROTHERM:61757
$0.12
Picture of SILICONE SEALANT 11 OZ

SILICONE SEALANT 11 OZ

HYDROTHERM:66-00102-001
SKU: HYDROTHERM:66-00102-001
$24.75