What Size Tankless Water Heater to Buy?

There is a lot of debate about which size tankless water heater to buy. To really get a handle on the debate, you have to understand some of the basics that go into determining the size of a water heater. If you are unsure about what size tankless water heater to buy, here are some things that you should consider. The basic rules of thumb for what size tankless water heater to buy are as follows: