SPRING BLOWOUT SALE!! This is an American Made Water to Air Heat Exchanger. Limited Supply! Get one before they are gone!! 12x21 / 100,800 BTUs / 100 PSI For use in your hot air furnace plenum. ***Not recommended for air compressors*** This listing does not include the install kit. Information about our heat exchangers This heat exchanger is ideal for a 12"x 22" plenum or larger. The outlets come out on the 12" side (shown as the vertical side in the picture above) The fin area is 12"x 21" 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 3/8" copper. All our exchangers include the flat front face mounting for easier installation and increased plenum strength. Our exchangers have 1" 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. Any questions or concerns call us at 800-571-7002 See our other listings if you wish to purchase the install kit. 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 Ebay 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 we sell in our Ebay store. We provide a lifetime warranty against manufacturer's defects and corrosion. Any questions feel free to email us or call us at 888-591-0943 Dealer inquiries welcomed. 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 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. Check our other listings for an installation kit that makes it super easy to do the entire installation. 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 furnace 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. All coils come with a lifetime warranty against manufacturing defects and corrosion. Any questions feel free to email us or call us at 888-591-0943 Part# Width Depth Plenum Depth Overall Depth Port Size BTU 8x8 8 8 9 13 1 25,600 12x6 12 6 7 11 1 28,800 12x12 12 12 13 17 1 57,600 12x15 12 15 16 20 1 72,000 12x18 12 18 19 23 1 86,400 12x21 12 21 22 26 1 100,800 12x24 12 24 25 29 1 115,200 14x10 14 11 11 15 1 56,000 14x14 14 14 15 19 1 78,400 14x16 14 16 17 21 1 89,600 14x18 14 18 19 23 1 100,800 15x15 15 15 16 20 1 90,000 15x18 15 18 19 21 1 108,000 15x21 15 21 22 26 1 126,000 15x24 15 24 25 29 1 144,000 16x16 16 16 17 21 1 102,400 16x18 16 18 19 23 1 115,200 16x20 16 20 21 25 1 128,000 16x22 16 22 23 27 1 140,800 18x18 18 18 19 23 1 129,600 18x20 18 20 21 25 1 144,000 18x22 18 22 23 27 1 158,400 18x24 18 24 25 29 1 172,800 19x20 19 20 21 25 1 152,000 20x19 20 19 20 24 1 152,000 20x20 20 20 21 25 1 160,000 20x22 20 22 23 27 1 176,000 20X25 20 25 26 30 1 200,000 22x22 22 22 23 27 1 193,600 22x25 22 25 26 30 1 220,000 22x30 22 30 31 34 1 264,000 24x24 24 24 25 29 1 230,400 24x24 24 24 25 29 1.25 230,400 25x30 25 30 31 35 1 300,000 30x30 30 30 31 34 1.25 360,000 36x36 36 36 37 41 1.25 518,400 SIZE BTU CFM GPM 8X8 25,600 500 5 12X6 28,800 600 5 12X12 57,600 700 6 12X15 72,000 700 6 12X18 86,400 800 6 12X21 100,800 800 6 12X24 115,200 800 6 14X10 56,000 800 7 14X14 78,400 800 7 14X16 89,600 800 7 14X18 100,800 800 7 15X15 90,000 1000 8 15X18 108,000 1050 8 15X21 126,000 1100 8 15X24 144,000 1150 8 16X16 102,400 1250 8 16X18 115,200 1650 10 16X20 128,000 1800 10 16X22 140,800 1900 11 18X18 129,600 2000 12 18X20 144,000 2350 14 18X22 158,400 2400 14 18X24 172,800 2450 14 19X20 152,000 2500 15 20X19 152,000 2500 15 20X20 160,000 2700 16 20X22 176,000 2750 17 20x25 200,000 2800 18 22x22 193,600 2400 21 22x25 220,000 2800 21 22x30 230,000 3000 21 24x24 230,400 3300 21 24x24 w/1 1/4" ports 230,400 3300 22 25x30 300,000 3400 22 30x30 w/1 1/4" ports 360,000 3600 24 36x36 w/1 1/4" ports 518,400 4000 30
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