How long does a water heater take to heat up?

How long does a water heater take to heat up?

Most people face the problem of waiting a long time for water to heat up in the water heater. There are several reasons for the slow heating of water in water heaters or geysers. Therefore, people often search for how long does a water heater take to heat up? So that, they can check whether their heater is taking the normal time or more time to heat water. Normally, a water heater takes around 60 to 80 minutes.

In this article, we will discuss various factors upon which heating depends. Moreover, we will discuss the methods to speed up the heating of water in a water heater.

how long does a water heater take to heat up?

When it comes to gas water heaters, you can expect the water in the tank to be fully heated within an average of 30-40 minutes. It may seem a long time to you, but it’s important to note that the hot water is stored and readily available for use through your pipes. You should also know How long does a water heater take to heat up?

Unless you’re using hot water continuously, there should always be hot water ready in the tank. The time it takes for hot water to reach its destination depends on factors such as pipe insulation and the proximity of the heater to your faucet or shower.

On the other hand, electric water heaters take about twice as long to heat their tanks. You should anticipate waiting for an hour or more before being able to use fully heated water.

Tankless water heaters operate differently; they only heat and supply you with hot water when needed. This process usually takes only a minute or so in theory. Tankless heaters work efficiently unless everyone in your household requires hot water simultaneously which may cause some issues.

how long does a water heater take to heat up?

Factors Responsible for Slow Heating of Water:

If you’re experiencing slow hot water, whether it’s from a gas or electric heater, there are several reasons why this may be happening.

Distance Between Shower and Water Heater:

One reason could be the distance between the faucet or showerhead and the hot water heater. The longer the distance, the longer it will take for the hot water to reach its destination.

Low Volume Restrictor:

Another possible reason is that your faucet or showerhead has a low volume restrictor installed, which can slow down water flow and delay delivery of hot water. If you suspect this may be the case, it’s best to contact a plumber for assistance.

Age of Water Heater:

If you have an old water heater, it will take more time to provide hot water. The average lifespan of these appliances is around 10 years. If yours is close to or beyond this age and not functioning properly, consider replacing it with a new one.

Sediments Buildup:

Sediment buildup inside your tank can also cause your hot water heater to deliver slower than usual. This problem can often be fixed by flushing out the tank yourself or hiring a professional plumber. These sediments also decide How long does a water heater take to heat up?

Smaller Tank Size:

Lastly, if you have too many people using your current small tank, upgrading to a larger one might solve your issue. In some cases where space permits, it might make more sense to add another smaller-sized appliance instead of replacing an existing one altogether.

How to Speed up the Heating of Water Heater:

There are certain factors that can speed up the heating of water in a water geyser. Let us discuss those features in complete detail.

  • Installing a Re-Circulation Syetm:

One option is to install a hot water recirculation system. It will move water more quickly from the heater to the tap and recirculate unused hot water back to the tank. You can activate these systems with either a timer or a thermostat. Therefore, it can significantly improve your water heater’s efficiency. This factor decides how long does a water heater take to heat up?

  • Upgrading Tankless model:

Another option for speeding up the heating of water is to upgrade to a tankless model. A tankless model typically gives hot water more quickly than old tank models. Because of this property, it has become very popular. Moreover, this model is affordable too. Your plumber can guide you better on various options and explain the benefits of using tankless.

  • Take a Large Size Heater:

If your current tank is simply too small for your family’s needs, consider upgrading to a larger one. Your plumber can outline different options for you to choose from depending on your specific requirements.


Q. How long does a water heater take to heat up after resetting?

Usually, the water heater will take a little of your time for heating the water. But if you have an on-demand water heater, then you can get warm water in no time. There are various factors that can change the heating time of water. It depends on the size of the tank. With gas water heaters, it usually takes around 30-40 minutes to get enough hot water for a shower. While electric tanks can take up to 60-90 minutes.

Q. How long does it take for hot water to come back in the shower?

It depends on the type of water heater you have. If the heater is a gas water heater, it typically takes 60 to 70 minutes. But if the heater you own, is an electric tank water heater then it will take around 120 minutes for the water to come back into the shower.

Q. How long does a water heater take to heat up 40-gallon water?

Under normal conditions, A 40-gallon heater can warm up your water in just 30 to 40 minutes. There are some important factors that can change this time also. But if you take a larger tank like an 80-gallon one, then it takes about 60 to 70 minutes. However, if you have an electric hot water tank, the wait time will increase slightly.

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

Do you happen to own an electric water heater with a 50-gallon capacity? If so, it typically takes around 145-150 minutes for the water to heat up. On the other hand, if you have a gas water heater with the same capacity, it should only take between 40 and 50 minutes to heat the water.

Final Thoughts:

You may be searching for how long does a water heater take to heat up? The exact answer to this query is that it takes around 60 to 80 minutes on an electric water heater. However, in different types of water heaters, this time varies. Moreover, there are certain factors that affect the heating process of water inside a water geyser.


Engr Hamza

I am Engr. Hamza Yousaf, a Blog writer with 5+ years of expertise in Blog writing. Sharing accurate and user-friendly info makes me an expert blog writer. I am sharing unique ideas and solution to different queries on My other publications are on sites like, and This is all about me thanks!

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