# FAQ: How Long Does The Water Heater Take To Heat Up?

## How long does it take for a 50-gallon water heater to heat up?

A 50-gallon hot water heater with 5,500-watt elements set to 120 degrees takes about 1 hour and 20 minutes to heat water coming in to the unit at 60 degrees. Conversely, when the water entering this same tank is 40 degrees, it takes 1 hours, 47 minutes to heat it up.

## How long does it take a 40 gallon water heater to heat up?

The average gas water heater is around 40 gallons and takes about 30 to 40 minutes to heat 40-degree water up to 120 degrees. A 50-gallon unit will take about 40 to 50 minutes to heat up. A large 80-gallon gas water heater takes about 60 to 70 minutes to heat up.

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## How long does it take a 10 gallon water heater to heat up?

If you have a 10 gallon tank, it can take about 33 minutes to fully heat up.

## How long does it take for hot water to come back?

If the previous shower lasted 15 minutes, you’re looking at about four minutes of hot water remaining. If you want to loll in your own 15-minute shower, you’ll need to wait 47 minutes before stepping in. (Gas units heat faster, so multiply by 1.9 instead of 4.3.) Use that time to iron or brush your teeth.

## Can you manually fill a hot water heater?

While an HVAC service call is the norm, you can refill your hot water tank and save the time and expense of a technician. If the hot water heater breaker isn’t labeled, turn the main power breaker to the “off” position. In the case of gas fired water heaters, make certain that the gas selector switch is set to “pilot.”

## How long of a shower can you take with a 40 gallon water heater?

A 40-gallon water heater can provide up to 2 showers in an hour (if you’re not using any other water appliances).

## Why does my water heater take so long to heat up?

Other problems that can cause a water heater to suddenly take much longer to heat up include a broken thermostat, a broken dip tube or bad burners/heating elements. Unfortunately, you’ll need a professional for these particular water heater repairs.

## Is 40 gallon water heater enough for a family of 4?

Typically, the rule-of-thumb is that you want a 40 gallon tank for 1 to 4 people, a 50 gallon tank for 4 to 6 people, and a 50 gallon high recovery or 75 gallon tank for 6 to 8 people. Energy consumption for 40 and 50 gallon standard water heaters is quite comparable.

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## How do I make my hot water heater last longer?

Turn up the thermostat on the hot water heater. One of the easiest ways to make a hot shower last longer is by using less hot water while it’s at a higher temperature. To do this, turn up the temperature on the thermostat that’s attached to the hot water heater tank. (Not the thermostat on the wall.)

## How much hot water does a 20 minute shower use?

If a standard showerhead is fitted, it will use around an extra half a gallon each minute, accounting for a 25-gallon emittance every 10 minutes, or 50 gallons throughout a 20-minute shower.

## How long does it take a 50W heater to warm a 10 gallon tank?

A 10-25 watt heater and takes around 40 minutes to heat up completely. A 25-75 watt heater and will need about 90 minutes to heat up completely. A 75-100 watts and around 120 minutes to heat up completely. A 125-140 watt heater and will take about 150 minutes to heat up completely.

## How do you shower when there’s no hot water?

Move quickly so that you do not have to stand under the shower head any longer than necessary. Move out of the stream of water. Try to point the shower head away from you as much as possible. Put shampoo in your hair, and scrub as you normally would.

## How can you tell when a hot water heater is full?

Turn off the drain valve once the water runs completely clear. Let your water tank fill up. You’ll know when your water tank is full when the hot water tap, which you turned on earlier, runs normally without any residual air coming out. Turn off the tap.

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## What is a good recovery rate for a hot water heater?

When determining a good recovery rate for a hot water heater, it largely depends on your household’s needs. In many cases, you’ll see a residential water heater recovery rate average around 40 gph, though there are many models that can be as high as 50 to 60 gph.