NEW Rinnai RXP199iN Smart Sense Condensing Tankless Water Heater, 199,000 BTU, Up to 11.1 GPM, Natural Gas or Propane, Indoor/Outdoor Installation, Built-In Recirculation Pump

Tankless water heaters are tiny compared to everything else. Maybe 1/3 to 1/2 size of anything with a tank attached. I bought this one and had it installed professionally: https://a.co/d/05eCwptb With the recirculating pump, you wait a lot less until the water reaches the water spout.