A flow sensor (2) detects water coming into the heater and sends a signal to the control panel to start producing hot water.
It all starts when you turn on the hot-water tap (1).In it, we’ll explain how a tankless water heater works, tell you what you need to know before you buy one-and before the installer arrives-and let you in on the units’ operating quirks, so there won’t be any surprises if you go tankless. What’s more, since their introduction in the United States in the 1990s, tankless heaters have become increasingly sophisticated, with features like built-in recirculating pumps (for “instant” hot water), and wireless connectivity that tells you via smartphone exactly when a unit needs maintenance.īelow is our guide to tankless water heaters. (A typical gas-fired tank wastes 40 to 50 percent of the fuel it burns.)Īnd because there’s no tank to fail, there’s almost no chance of a catastrophic leak. It generates hot water only when you need it-and for as long as you need it-saving 27 to 50 percent of fuel costs over tank-type heaters.
These are the arguments for investing in a tankless water heater. Tankless Water Heater Installation: Is It Worth It? Then there are the nagging worries: Is it filled with energy-robbing sediment? Will it spring a leak? Both are reasonable concerns, as tanks generally fail in 8 to 12 years. If a teenager takes a long shower, or a spouse settles in for a tub soak, there can be a long wait for that emptied tank to reheat. We fill up big 40- to 50-gallon storage tanks, then pour energy into them 24/7, year in and year out, to make sure we have hot water at the ready whenever we want it.īut often it doesn’t work out that way. Think about it: The way most households in this country heat water is absurdly wasteful.
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