How long does it take to heat up a water heater and what factors affect the time it takes?
Find out everything you need to know in this guide.
📌 Key Findings:
- It takes an average of 40-80 minutes for a tank based water heater to heat water.
- A water heater provides instant hot water whenever you need it.
- Factors that affect water heating times include the type, age, condition and size of the heater, the diameter of the water pipes and the distance from the faucet or faucet.
⏱ How long does it take for a water heater to heat up?
The time it takes for a water heater to heat up depends on the type of heater you own.
Some heaters, such as B. water heaters, deliver hot water immediately. Others, like most tank water heaters, takes about 40-80 minutes on average to heat a lot of water before it can be delivered to your home.
At a glance, the average heating-up times for the various water heaters are:
|heater type||heating time|
|Electric water heater with tank||60-80 minutes|
|Propane water heater with tank||30-40 minutes|
|Propane (gas) water heater||0-15 seconds|
|Electric instantaneous water heater||about 0-15 seconds|
These are the times it takes to heat up cold water that is newly entering the heater. So normally even with a tank water heater you don’t have to wait as long as mentioned above as the tank already contains hot water ready for use when needed.
However, if you use all the water in the tank at once (e.g. running a bath or running multiple appliances and fixtures that consume hot water at the same time), you’ll have to wait all the time for the tank to refill and heat up, which means that cold water is available to you until then.
📋 Types of water heaters and average water heating times
Below we’ve listed the different types of water heaters and their average water heating times, assuming they’re new and the right size for your home:
Gas tank water heater
A gas tank water heater is a heater with a tank for storing and heating water. There is usually a gas powered burner at the bottom of the tank uses propane to heat the water. The tank is filled from the bottom up and the hot water leaves the tank through a drain pipe.
The average time it takes a gas water heater with a tank to heat water is 30-40 minutes with an empty tank.
Gas instantaneous water heater
A gas instantaneous water heater is a gas water heater which works on demand instead of using a tank. When you turn on a hot water faucet or faucet, water flows through the unit’s heat exchanger, where it is heated by a gas burner before being immediately delivered to the point of use.
The average time gas water heaters take to heat water is 0 seconds. You may have to wait It takes 10-15 seconds for the water to reach the faucet Depending on the size of the water lines and the distance they have to travel, it depends on the size of a water line or fixture in your home.
Electric water heater
An electric water heater is a more energy efficient alternative to a gas tank water heater. This heater uses high voltage electric heating rods which heat the water from the center of the tank outwards.
On average, an electric water heater with a tank It takes 60-80 minutes to heat water before delivering it to your devices and facilities. Running on electricity may use less energy but is not as effective as gas at heating water, so the process takes longer.
Electric instantaneous water heater
An electric instantaneous water heater is exactly the same as a gas instantaneous water heater with one difference uses electrical elements for heating water instead of a gas burner. This water heater is also designed to provide hot water when you need it.
Like gas tankless water heaters, electric tankless water heaters heat the water immediately, but it may happen that this is the case take 10-15 seconds to get that hot water to your faucet or faucet.
solar water heater
A solar water heater is a type of water heater that uses solar energy to heat water. This type of water heater is ideal for homes in regions with many hours of sunshine year-round, but is typically installed alongside a backup water heater so that heated water can still be supplied when solar heating cannot be used effectively.
Depending on the type of solar water heater you buy, this may take some time It only takes a few seconds to get heated water from this device.
📊 Factors affecting hot water heating time
Here are the top factors that affect how long it takes for your water heater to heat up:
Type of water heater
The main factor that determines hot water heat up time is the type of water heater you own.
if you have one Electric or gas instantaneous water heaterit only takes a few seconds to get hot water after you turn on your faucet or shower head.
if you have one Tank based heatingyou either have direct access to hot water from the tank, or if the heater starts with an empty tank you have to wait an average of 40-60 minutes for the entire tank to heat up before you do hot water access.
The water heating temperature setting and the temperature of the initial water supplying your home both affect the temperature rise – the total number of degrees the heater must heat your incoming water to achieve the desired water temperature.
The greater the difference between the flow temperature and the desired hot water temperature, the longer the heating process takes.
If you want to reduce heat-up time, lower your water heater setting to a slightly cooler temperature, which will put less work on the heating elements.
Water heater tank size
The size of your water heater affects the water flow through the heater and (for tank models) the volume of water in the tank.
If you have a water heater or an electric heater, The larger the heater, the faster it should heat up and deliver hot water to your fittings and faucets.
If you have an electric or gas tank heater, With a larger capacity of the water heater tank, it takes longer to heat up. This is because a larger amount of water needs to be heated.
Distance from water heater to device
The distance of the piping from the water heater to the facility it supplies hot water also affects the time it takes to obtain hot water.
Once the water has been heated, it needs to travel from the heater through the pipes to your faucet, appliance, or showerhead.
The greater the distance between the faucet and your water heater, the longer it will take for the hot water to arrive.
Age and condition of the water heater
The age and condition of your water heater affects its heating performance.
Older models of water heaters were not built as efficiently as they are today. In addition, due to natural wear and tear over the years, your water heater will gradually lose efficiency to the point of almost breaking down.
Most water heaters last an average of 10 years. So if your water heater is older and no longer performing as expected, you should consider purchasing a replacement model.
The diameter of the pipes that run from your water heater to your home’s plumbing fixtures was determined when you first built your home, based on the number of bathrooms in your home and your anticipated water needs.
The larger the pipe diameter, the faster the hot water supply to your fittings.
While the diameter of your water pipes does not affect the water heating time, it does affect how long it takes for the hot water to get to where you need it.
📖 How to speed up water heating by water heater
Caught an ice-cold shower too often? There are a few options to consider to help you have quicker access to hot water in your home.
Buy a heater with a larger tank
If you are tired of waiting more than 60 minutes for heated water after all the hot water in your heater’s tank has been used up, you should consider expanding the tank capacity.
Perhaps you bought your home with a water heater tank size that was ideal for two people—but now you’re a family of four and your water needs are greater.
To avoid cold water, talk to your local plumber about purchasing a larger capacity tank for your heater so you have more water available when you need it.
Switch to a water heater
Finally, there is no avoiding the fact that tank heaters, regardless of tank size, will run out, increasing the likelihood that you will have cold water available while you need a new batch of water to heat.
👨🔧 If you run out of tank water heaters, consider purchasing a replacement tankless water heater.
Tankless water heaters give you hot water on demand whenever you need it, and they are becoming more affordable as they become more popular. Contact your local plumber if you want to know how much one of these systems will cost.
Install a hot water circulation system
A hot water recirculation system is a plumbing system that quickly directs heated water to your fixtures and appliances.
Although these systems do not reduce actual heat-up time, they do reduce delivery time because they use a pump and do not rely on water pressure.
The biggest advantage of a hot water circulating system is that the water from Your heating is ready for operation fasterSo you don’t have to leave the tap running for as long – which in turn saves time, water and money.
📑 Final word
The answer to the question “How long does it take for a water heater to heat water?” depends on your heater type.
If you have a tankless gas or electric water heater, you can enjoy hot water right away. These systems are superior to gas or electric tank water heaters, which take more than an hour to heat empty water.
If you hate waiting for hot water, consider installing a water heater in your plumbing system.
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