hot water heater

plural hot water heaters · alternative hot-water heater · alternative hotwater heater

1. An apparatus, usually fuel-burning, electric or solar-powered, in which water is heated to be used directly as domestic hot water or process hot water (but not for supplying space heating, calorifiers etc, for which a boiler or furnace is used).

   This system has an insulated 5-gallon electric hot water heater directly under the sink.

   2003, Blair Allen, Julie Jones Lloyd Kahn, Septic System Owner's Manual

   3 more examples

   This [warm-air heated] house has a supplemental electric hot water heater and an oil furnace.

   1977, Kaiman Lee, Encyclopedia of Energy-Efficient Building Design: 391 Practical Case Studies

   It's a good idea to insulate at least the first ten feet of the hot- and cold-water lines coming out of the hot water heater.

   2004, Black & Decker, The Complete Photo Guide To Home Repair

   A hot water heater is a potable water boiler in which the operating pressure does not exceed 160 psi and/or temperature does not exceed 210 °F.

   2004, Mohammad A Malek, Power Boiler Design, Inspection, and Repair