I installed two Waterfurnace systems. After 4 years both have coil failures, as did my neighbor who also had two systems fail around the same time.
Our dealer retired and left us to another company to handle warranty issues. That company didn't install the system so they chose to ream us on cost to replace the coils. Waterfurnace did provide replacement coils, but refused to recognize that the problem with the coils was their problem and refused to cover the nearly $2000 charged to replace the coils.
There is ongoing finger pointing between the repair company and Waterfurnace. I could never recommend Waterfurnace to anyone based on my experience.
Monetary Loss: $2000.