36x36 Water to Air Heat Exchanger~~1 1/4" Copper Ports With Install Kit

  • $940.00

 36x36 / 518,400 BTUs / 180 PSI 

For use in your hot air furnace plenum.

This listing includes the install kit.

Information about our heat exchangers

  • This heat exchanger is ideal for a 36"x 37" plenum or larger.
  • The outlets come out on the 36" side (shown as the vertical side in the picture above)
  • The fin area is 36"x 36"
  • There is a 1" frame on the end opposite the outlets that covers the copper elbows. This makes the area inside of your plenum 1" longer.
  • All exchangers are 3 1/2" thick.
  • Aluminum fins are installed at 12 fines per inch.
  • All exchangers are triple pass design.
  • Tubing is 1/4" copper.
  • All our exchangers include the flat front face mounting for easier installation and increased plenum strength. 
  • This exchanger has 1 1/4" copper outlets and can be installed with either sweat fittings or push fit type fittings like sharkbite's.
  • Exchangers from us come with a lifetime warranty, including shipping.  
  • Exchangers will work with chilled water also.
  • We stock many sizes, always order the largest size that will fit into your plenum.
  • GPM 54

  • CFM 6322

  • Outside Dimensions 36”(width)x39.5”(Length from Manifold to Base)x3.5”(Thickness)


This also includes the installation kit shown in the pictures above. 

Installation brackets for installing water to air heat exchangers inside of furnace plenums. This easy to install kit takes all of the work out of installing a coil.  Great for the do it yourselfer or the seasoned installer.

This kit will work with most coils being sold on other sites that are 3.5" wide. Check before you buy, but that will cover over 90% of the ones being sold. Even most that are listed as 4"  are actually 3.5". These will work with every heat exchanger being sold elsewhere and our website store.

We provide a limited lifetime warranty against manufacturer's defects..


Dealer inquiries welcomed.

These heat exchangers are to be hooked up to a boiler or a chilled water source.

These heat exchangers can also be used as a stand alone heat source by simply attaching a fan or squirrel cage to one side of the unit. They can be installed in either the hot air side or the cold air return of a furnace. Please note that if installed in the cold air return you will need to install a 3 way zone valve in order for the fan to operate properly.

This heat exchanger is of a new style which does not require bending of your duct work

This new style heat exchanger can be easily installed by just slipping it into the plenum and attaching with self threading screws.  You will not need any special tools to install.  This unit is easier to install than others on the market because it attaches from the front instead of the side.

Water  to  Air heat exchangers, often called duct coils or furnace radiators, are used for installing into forced air furnace to provide heat from hot  water.  They are  usually installed into the cold air  side of the furance if that is the best option. They work in much the  same way as  the  central air conditioning unit.

The  following things should be taken into consideration when installing a duct coil.

(1) Size the coil so that the  fins take up the maximum amount of the plenum as possible.

(2) Securely fasten the unit so that it doesn't rattle.

(3) Make sure there are no foreign objects are touching the fins or the tubes.

(4) Duct tape any air leaks.

(5) Do not bend the fins.  If you do, straighten them as best you can.  A tool called a "Rake" is available for straightening the fins.

(6) If you are  going  to run your outside heat in the summer install a bypass valve.

(7) A duct coil installation kit makes installing the heat exchanger easier.

 All coils come packed in foam to prevent damage during shipping. We are a well established US company with many years of experience selling parts and supplies to the solar and outdoor wood furnace industries. Feel free to contact us with any questions you may have about hydronic heating or cooling parts and supplies whether you bought them from us or not.

 ***We will ship to Alaska/Hawaii...please call for shipping quote*** 



Net Orders Checkout

Item Price Qty Total
Subtotal $0.00

Shipping Address

Shipping Methods