The customer had no hot water at the start of the call, and I was able to find out the water heater was unmaintained and very old. I gave the customer options on water, filtration, tankless water, heater, and tank type water heater, in the customer chose to have a tankless water heater installed, and a whole home water filtration system. I relocated the main water shut off into the mechanical room inside the garage. A navien 240A2 was installed, and a halo H2 zero ultimate. The pressure reducing valve was reused due to it being a new condition and working.