If it were not for AJ the technician they would have gotten zero stars.
I have a Nuvo water treatment unit going into my Penguin Air installed water heater (bought from and installed by Penguun). One of the fittings going into my Nuvo was leaking. In a nutshell $230 bucks to replace 2 brass fittings and flush my water heater. Then told they could not fix a leaky bathroom faucet.
Buyer beware, very pricey