Water To Air Heat Exchanger for Home Heating Systems. Works with Boilers to install into forced air heating systems. Size is overall 22" high. coil size is 19 5/8" x 16 1/4" x 3 1/2". Has 1" water inlets with fittings for 1" PEX tubing. They can be removed if you need to solder 1" copper to it. No Leaks. Makes a lot of heat. Cash ONLY. No charges, checks, crypto, etc. No shipping or trades. E-mail through Craigslist or Call 3 one 3 eight 1 nine 5 five 1 zero. Leave a message with your name and phone number and I will call you back. I will NOT respond to messages with is it "still for sale" or "still available". If you see posting it is still for sale. I will delete when sold.