If you have a gas water heater, plan to wait minutes for the water to get after the heater has drained its capacity. If you have an electric water heater, double that to . hours. Of course, with a tankless water heater, you never have to worry about the recovery rate..The model and size of the water heater determine how long it takes for the heater to warm up. It may take more than an hour for the water to warm up completely. A gas water heater may be able to refill its supply of water in an hour, while a similar electric model may take more time. Tankless .Gas water heaters are more efficient than electric ones they heat up in about half the time. The temperature of the water coming into the unit and the temperature setting to heat the water in conjunction with the power supply determine how long it takes for a gallon water heater to heat up… The temperature of the water at the moment. . The desired water temperature. You can find the answer to items on the label on the side of the water heater. You need a thermometer to find item . The tank temperature necessary for a shower is about C The default values below are for a typical immersion heater for people..The average gas heater takes between minutes to fully heat up the water in its tank. Electric Heater The average electric heater takes about twice as long as the average gas heater to fully heat up the water in its tank, so you can expect it to take between an hour and an hour and minutes to heat up..The Gas Water Heater. How long does it take for a water heater to heat up in the event that particular heater is a gas water heater? An average amount of water held by a gas water heater is about gallons of water, which allows entering of the supply at an average of degrees Fahrenheit slightly below room temperature ..The recovery time is the time the water heater takes to reheat its entire supply of water, and depends on whether the heater is a gas or electric model. A gas water heater will recover in half the time of an electric unit. A gallon gas water heater can recover in about an hour. Recovery for a gallon electric water heater takes about two hours..[Expected Shower Duration minus Minutes of Water Remaining] multiplied by . for electrical heater or . for gas. For this second stat, check your tank’s capacity listed on its side and note whether it’s gas or electric..
INTRODUCTION If you use an immersion heater to heat your household water it is useful to know how long you will have to wait for the water to warm up again so that you can have a shower..Interested in water heater prices? The cost for a plumber to install a water heater includes required permits and labor, which varies based on type of heater and your home’s plumbing..