A hot water heater , hot water booster tank , or indirect-fired hot water heater typically lasts from seven to 15 years. Our engineers will evaluate the hot water system, and advise you as to its remaining life expectancy. The boiler's internal temperature is typically about 180 degrees Fahrenheit. As the water circulates through the coils, it is heated. Tankless hot water heaters often suffer from problems, especially as they age.
Many systems start out at an initial temperature hot enough to scald .
After running for a short time, this hot temperature may fall to a relatively low temperature. To help overcome this problem, many people install hot water booster tanks in conjunction with a tankless hot water heater. A variation of the tankless hot water heater is the instant hot water heater, sometimes called the demand hot water heater. In an instant hot water heater, water passes over a heat exchanger. The heat exchanger is kept warm, usually by a gas flame or electric coil.