How to Get Hot Water Faster From Tankless Water Heater

In this article, we have explained How to Get Hot Water Faster From Tankless Water Heater, and why does it take so long to get hot water

It is a common notion among people that a tankless water heater can provide hot water in the blink of an eye. Though its modern technology is of advanced level still it can’t provide warm water instantly. It’s quite an inconvenience when you have to wait longer than enough to get hot water.

Does On-demand Tankless Water Works Instantly?

There is a huge difference in the working mechanism of the tank and tankless water heater. In traditional tank-style water heaters. A tank collects and maintains water temperature. Either if you are using warm water in the tank or not, the heater will keep on warming it without any delay.

While in the case of tankless water heaters, the water temperature will rise only on demand. There will be no shortage of hot water and whenever you open the tap warm water will come out of it. But the thing to keep in consideration is that you can never expect to get the first drop of water running out of the faucet will be hot.

The reality is, no tankless or tank water heater can deliver hot water within nanoseconds.

There are many factors that play role in delaying hot water delivery instantly and here we have compiled all of them so you can improve your tankless water heater’s heating mechanism faster.

Why Does It Take So Long to Get Hot Water?

Although a tankless water heater delivers hot water faster in comparison to the tank-style water heater there are many aspects that play role in delaying hot water supply.

The cold water stuck in a pipe can also make you wait for hot water to move out of the faucet. Sometimes, water has to travel in a pipe long enough that delays its delivery for a minute or two.

Below we have mentioned the list of reasons that can cause delays in the hot water supply.

Left Over Water In Pipes:

The most common cause of delay in getting hot water instantly through your tankless water heater is the leftover water in pipes. When you turn on the faucet water will come out of it instantly but that water won’t be hot because it is not coming straight out of the heater rather it is running out of the pipes to the faucet.

Flow Rate:

The flow rate of water also matters a lot in this phenomenon. With a lower flow rate, water will hardly reach the showerhead and result in a small and insufficient amount of water supply through the fixtures.

Even if the device is conserving some volume of water by cutting down its cost, still the water will take a long time to travel due to its low flow rate.

Distance Between Heater And Faucet:

The distance water has to travel from the heater to the faucet or shower also influences the wait time. Suppose, if the tankless heater is installed in the basement, how long water will take to reach the sink tap of the second floor? I would like to say, long enough.

The more distance water has to travel through pipes, the more you have to wait for hot water.

Sediment Buildup:

The durability and performance of your tankless water heater are compromised if there is heavy sediment buildup. In some areas due to a heavy supply of hard water, the overall performance of a heater gets poor. Minerals and sediments start to gather in the unit and in the end, there will be no hot water available in the meantime.

External Temperature:

The external temperature has a significant impact on the efficiency of the tankless water heaters. If the outside temperature is quite low, your heater will keep on delivering hot water to you by some effort. In case of freezing temperature, the performance will automatically get low.

The underground water will be colder enough that the heater will need to work harder than usual to warm water to a bearable range. Ultimately there will be a delay in reaching the desired temperature, so the timing will also be affected.

Malfunctioning in Heater:

If the above-mentioned factors are not influencing the delay, there could be a possible reason for malfunctioning in the heater leading to this delay. Hard water, improper installation, and faulty maintenance are the major factors that disturb the effectiveness and efficiency of a tankless water heater.

Ways to getting Hot Water Faster

The needs for hot water vary from home to home, so the methods to get hot water faster can also vary. But here we are mentioning some of the highly effective methods to boost the performance of your heater so you can get hot water faster than usual.

Recirculation Pump:


The best and most popular option to get hot water instantly is the installation of a recirculation pump. This device is highly reliable that delivers hot water faster within seconds.

In normal circumstances, when you turn off the tap, the water stays in the pipe and gets colder, and when you turn it on after some time, the trapped cold water will come out first out of the faucet, wasting time, energy, and water.

To deal with it, a recirculation or boosting pump can be installed near the faucet. A recirculation pump works in a way that when leftover water is present in the pipe it will travel back to the heater and will be replaced by hot water. When you turn on the hot water switch, the warm water will come out quickly without any delay.

It has been proven that a recirculation pump can reduce the water waiting time by between 60-80%.

An electronic recirculation pump uses an electric pump that can be controlled digitally by having a thermos zone valve. By pushing a button you can turn it on or you can also get help from a motion detector or remote to control and activate the pump.

While we are talking about electronics, read about 2022 models of electric tankless heaters if you want to invest smartly in the winters.

Point Of Use Tankless Water Heater:

A point-of-use tankless water heater is a small unit that can be mounted easily in a sink cabinet and closet. It runs in the same way as a whole house tankless heater but is made especially for handling a single shower or sink.

These are highly affordable and reliable for a home where water demands are not being fulfilled as per need.

Structured Plumbing (Demand System):


Last but not least structured plumbing is another impressive way for getting hot water faster. In this method, a water heater is installed in the center of the home & not inside the basement or garage.

Whenever you are in need of hot water, just turn on the water pump. The pipeline should not be away more than 10 ft. from faucets. Draining connections should be with 3-in pipes. An extensive line will cut off the wait for hot water after pump activation.

It doesn’t matter which method you prefer. You can easily save almost 11000 to 16000 gallons of water annually. The faster delivery of water also reduces the utility bills. So you can say it is an investment for a long period of time.

About Sami

Sami is also an Energy and Environmental Engineering graduate who has been working as a safety officer in a leading Fertilizer company for 18 months. He is also a graphic designer and marketing manager.

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