18x18 Water to Air Heat Exchanger Hot Water Coil Outdoor Wood Furnace

Part #: HWC-18X18
In stock

Availability: In stock

This unit is a Water to Air Heat Exchanger for use in your hot air plenum of your existing forced air furnace. This unit is most commonly used in conjuction with an outside wood furnace to transfer heat into your existing forced air system.

It can also be used with any other source of hot water such as a boiler to create hot air. This exchanger is for use with ANY outdoor wood stove and also features quality aluminum fins with seamless copper tubes.

  • These exchangers use Lead-Free solder and can be used with potable water
  • Our coils are packaged the best possible way to minimize shipping damage
  • The coils fit snuggly in the boxes to minimize movement within the box
  • There are strips of styrofoam all the way around the manifold to prevent damage if dropped
  • The entire coil is packaged in a double wall, cardboard box
  • These are also packaged with metal port protectors over the inlet/outlet ports to protect them from shipping damage
Product Data
  • Finned Area: 18" x 18"
  • Overall Dimensions: 18-1/4" x 20" x 3-1/2" THICK
  • Overall Dimesions (including Copper Manifold): 18-1/4" x 23-1/2" x 3-1/2" THICK
  • Rows of Tubes: 3 (3/8" Seamless Copper)
  • Inlet/Outlet: 1" Copper Sweat
  • Rating: 175 psig/350°F
  • Fin Spacing: 12/inch
Product Performance
  • 120,536 BTU with 180°F Entering Water Temp., 15 GPM and 1800 CFM (air flow)

We do our best to offer a high quality product that will not be damaged during shipping and you will not have to return due to manufacturers defects such as leaking.


A free copy of the written warranty is available upon request.

Free shipping on orders $99 and over to continental U.S.