Tank or tankless: which water heater fits your home

When a water heater fails, most people want hot water back the same day. That is the right instinct, but it is also the best moment to decide whether a tank or a tankless unit makes more sense for your home.

How a tank works

A tank heater keeps 40 to 50 gallons of water hot all day. It costs less up front, installs quickly and is easy to repair. Most last 8 to 12 years in Austin, a little less if the water is hard and the tank is never flushed.

The downside is that it can run out. If two people shower back to back while the dishwasher runs, the last person may get a cold rinse.

How a tankless unit works

A tankless heater warms water only when you turn on a tap, so it does not run out. It takes up little space and lasts around 20 years. It does cost more to install, especially if your gas line or electrical panel needs an upgrade.

Questions we ask at the visit

How many people live in the home, and how many showers run at the same time? How long do you plan to stay? Is there room for a tank, and is the current gas line large enough for a tankless unit?

Our honest advice

If you plan to stay more than ten years or often run out of hot water, tankless usually pays for itself. If you may move in a few years, a good tank is the simpler and cheaper choice. We price both in writing, so you can compare before deciding.