Water
Water heater is getting installed. I debated between doing a tankless setup and a tank based one. I decided to do this Vertex because it is sort of a mix of the two. It is a 75 gallon tank, but has a 100,000 btu heater and can heat 150 gallons/hr (75 deg rise). That nets the first hour at 225 gallons, which when mixed down is a lot of showers, especially for the three of us.
Since we have a pretty large hot water recirc setup, the tank is helpful.