Air to Water Heat Exchanger 18x18 1" Copper Ports

AB Air to Water Heat Exchangers also called Water to Air Heat Exchangers. It's designed with high-quality aluminum fins and seamless copper tubes. Despite a fin density of 12 fins per inch, there is low flow resistance. Our models, ideal for both residential and commercial applications, can be used with sources of hot water to create hot air, such as indoor boilers, outdoor wood boilers, natural gas boilers, propane boilers, oil boilers, electric boilers and other hot water heaters or furnace heat exchangers. This particular model has 1" ports and a capacity of 190,000 Btu. This product has a 1-year warranty against manufacturer's defects and is ETL listed.

Product Information

HTL18x18 Fitting Size
Design Pressure
190,000 Btu Rating
175psi @ 350F

Test Pressure

3 rows of 3/8", copper

12 per inch, aluminum Materials
Steel, Copper, Aluminum
Min. Operating

Max. Operating

Dimensions, Weight
18" x 18" x 3.5", 17lb

*Capacity is based on 180F boiler output


Residential and Commercial Heating and Cooling

Apartment and Condominiums Heating and Cooling

Forced Air Heating

Hybrid Systems

Air Conditioning


Inverter Cooling

FAQ and Support
What to do if the fins become bent:
To straighten out bent fins, you'll need a fin comb or something similar. Some people have reported success with a plastic butter knife. Make sure that whatever you use won't cause any scraping damage to the fins. Take whichever tool you decided on and gently go over the fins to straighten them out. This will work for most bent fin issues.
We have worked with heating systems for over 10 years and are happy to help you with any questions or concerns that you may have. You can email us at or call 833-328-6888 for help with your heating projects. *GENERAL LIABILITY INSURANCE