2023 is the 30th Anniversary of AQUECOIL® Hydronic Heating Units so the concept of upgrading heat pumps using hot water is no spring chicken. That said, here’s an article written by John Siegenthaler, P.E. for Plumbing & Mechanical Magazine back in the year 2000. Nearly all of it still applies today, even with all the advances in heat pump technology.
The Heat Pump Helper™ system takes a tried-and-true idea that was historically marginalized because of complex installations… And makes it simpler!