How Long Does It Take for a Water Heater to Heat Up?

How to cool water fast!

Vig16 (Mechanical) (OP)
OK, so I’ve been working on a few different things lately and one that I’ve been fumbling around with is being able to heat up water to about 70 deg C, then back down to about 38 deg C…all in less than 2 minutes too lol.I can’t really think of a way to get the water down to almost half the temperature of what it was in that short of a timespan.  I’m sure by having a fan at one end of the tube of passage and having that moving quickly I could do it, but I haven’t had much luck with that theory…Any ideas would be GREATLY valued!Thanks so much!!


How to Simmer Water For Different Purposes

Every one of us knows how water simmers, right?

We grab a casserole full of liquid and place it over the fire. Of course, we know that boiling on medium heat will take longer, that is why for cooking most people prefer using high heat. Like that, our tank will simmer quickly. 

We also know that when we leave the lid on top of the vessel, its content reaches boiling point faster.

But did you know that several different methods of simmering water exist hanging upon the particular result we want to get? It means that for cooking and for making water drinkable we can’t use the same method!

And here you can learn the best recipes for bringing water to the simmering point quickly and easy. 

Photo by Imani on Unsplash
Photo by Imani on Unsplash

Boiling water for cooking

So, we want to cook something. The first thing to do is to find a vessel with a lid. It is needed for making the content to roll faster. If we cover the top of the tank, we will enclose the heat, the temperature will rise faster, and our water will simmer. 

  • After the tank is chosen, fill it with water.
  • Use cool liquid since hot water can have harmful components from the pipes.
  • Also, the tank must not be full. First, because the food will be added into it (since you’re cooking) and that needs space, and second, the full casserole can splash you with hot water and leave burns.
  • Place the vessel over the high heat with the lid closed. 
  • After it started rolling, it’s time to add food to cook. We don’t recommend you add it before the liquid reaches the rolling point unless the recipe calls for it. Otherwise, it can lead to food getting tough and less flavorous.

Some say that adding salt can raise the water temperature and bring it to the boiling point sooner but that’s not correct. Adding salt only effects on food’s taste, not on the speed of simmering.

After the water is at the boiling point, bring the fire down, otherwise, it’ll turn into steam ay faster.

Also, it’s better not to remove the lid while cooking since the food will need more time to get ready, and the liquid will boil out faster.

And of course, don’t add cool water to the already boiled. It can damage the taste of your cooking.

This easy method will help everyone cook faster and keep the food delicious.

How to purify water?

We may need to do this when we are on the road or on a long tour in the wild.

Bringing water to a high temperature helps to remove all the impurities, so it’s good to know. Anyway, keep in mind that simmering won’t kill chemical contaminations. Also, always filter the cloudy liquid before boiling or cooking in it.

So how to purify it? The recipe is simple.

  • Pour the water to the bowl (skillet, etc.) and place it on high heat.
  • After the temperature is high and liquid starts rolling, let it steam and bubble for 2-3 min or longer. Like that, all the harmful bacteria will be killed for sure.
  • You can cover the tank with the lid or not – up to you.

Remember that if you go high in the mountains, the liquid will start simmering at a lower temperature due to the pressure changes. So let it simmer longer than usual 3 minutes.

The purified liquid must be kept cool in a tightly sealed tank. If it tastes “flat”, it’s best to pour it between two tanks to fix the taste.

Another way is to leave water exposed to direct sunlight in a transparent tank but it’s not the best option.

Microwave boiling

Photo by Erik Mclean on Unsplash
Photo by Erik Mclean on Unsplash

One of the alternative recipes is to simmer water in a microwave. 

Pour it in any suitable bowl you can find that will stand the microwaving. As an option, find a ceramic/glass tank that will withstand the heating temperature.

Add any microwave-safe object into the water (e.g. wooden chopstick, etc.) to help it bubble. Salt can help, too, so add it if you don’t mind salty liquid.

Heat water in short intervals (approximately 60 sec) stirring regularly. When the liquid is steaming, it’s already perfect.

Boil water at high altitude

When we move up from the sea level, the pressure changes and it takes water way less time to roll. That’s why boiling it at a high altitude can be a bit tricky (mostly because it boils faster but remains hard to cook in it).

One of the easiest recipes in this situation is to follow simple steps.

  • At high altitude, due to another pressure, the liquid evaporates faster, so start with more water
  • Boil longer. If it normally takes 20 min or less, add 1 min of cooking per every 305 meters above sea level. If the normal cooking time is more than 20 min, add 2 min per 305 meters when being up from sea level
  • Go for a pressure cooker since it helps to get water simmered faster and better
  • Salt and other related methods will hardly work so don’t waste your time on those.

Can you instantly vaporize water?

So the answer is: if the water has access to enough heat, at a high enough temperature, it will indeed instantly vaporize.

How long does it take water to evaporate indoors?

displacement of air over the surface, the faster air changes, the faster the evaporation. With no more details, the best I can suggest is one to 2 days.

How To Improve Hot Tub Energy Efficiency

The thing about hot tubs is that they can jack with your electric bill, especially if you use them all the time. On average, you’ll probably see a spike of about $50 a month. 

While most people probably don’t consider this to be too terrible, it still makes a difference. And there are ways you can keep that cost even lower. 

A hot tub cover makes a huge difference in how quickly you can heat up your tub, therefore keeping energy consumption down. It also keeps the water clean so maintenance is a lot less of a hassle.

Nothing cools off your water like cold air or snow. It’s best to keep it in a protected area or put a wind block up around it.

This can be a fence, trees, or panels. Whatever provides a little protection from the elements.

Turning the heat down just a few degrees will go a long way toward lowering that electric bill. And the truth is you probably won’t even notice.

This is especially helpful when you’ll be away for a while. At these times, you can lower it even more and then raise it back up when you get home. 

Just be sure to keep it well above freezing in winter months! 50° is usually sufficient.

Did you know that your electric company charges you more for usage during certain parts of the day? 

Yep, when demand is highest, you pay the most. For most places in the US, these peak hours are 10 AM – 8 PM during the summer and 7 AM to 11 AM/5 AM – 9PM in the summer.

Knowing what these peak hours are and heating at different times could save you a little on your bill.

How long do you boil water?

It depends on whether you are using tap or filtered faucet liquid.

In the first situation, it is harsher and has more impurities, in the second case, it is softer.

Because of this, filtered water takes less effort to bring it to seethe. 

So, to make faucet H2O safe to drink, keep it seething for 120 seconds after it was brought to a boiling point. It will destroy the germs and make the water softer.

What is the average time to boil water? You can boil one liter of water in 9 minutes on an ordinary stove, and it will take 6-8 minutes if you boil it at a gas cooker. The time will increase by one and a half if you boil 2 liters of water.

Photo by Soroush Karimi on Unsplash
Photo by Soroush Karimi on Unsplash

Also, take into account the volume of the pot you are using as large pots take a longer term to seethe than the small ones.

Does salt make water boil faster? Yes, the salt makes the water boil faster. When you add the salt to the water, it is harder for bubbles to come out from the water, and the water is heated much faster because water molecules turn out to gas-phase quicker.

Does oil help water boil faster? Yes, oil help water boil faster. When the oil float on the top, it will give a thin layer on it and prevent bubbles evaporation. So the water with the oil will increase its temperature to the boiling point much faster.


How long will it take until the water boils?

First of all, everything hangs upon on the proportions and volume of your pot or the tank you are using for this purpose.

Also, the thing that matters is how big the fire is that you are using.

In addition, the type of water you are boiling also counts because faucet water will take more effort to simmer it compared to the filtered water, for example.

Anyway, the average period that passes until water starts boiling is usually ⅙ of an hour.


Why does water take so long to boil?

You have probably noticed many times that it takes a pretty extended period to seethe a kettle or a casserole to make yourself some tea or cook spaghetti!

Why is it like that?

Well, as you probably know from the school lessons of physics, water is a pretty bad conductor of heat because it gets warm too slow. In addition, the structure of water is very fluid and its molecules are always on the move. That is why it takes more effort to heat up water than, for example, the air.

On the other hand, water keeps heat longer that is why, once boiled, it can stay hot for quite an extended period.  

Photo by Tengyart on Unsplash
Photo by Tengyart on Unsplash

How long do you have to boil water?

Giving water enough space to seethe after it started rolling allows destroying the harmful germs and impurities it may have which makes it safer for drinking.

Depending on whether you are boiling faucet water or filtered water, the boiling term may vary.

For faucet water, 120-180 sec of boiling is usually required, whilst filtered water is enough to simmer for one minute.

And remember that boiling term means the period the water keeps rolling after it was set to seethe.


The MSR Pocket Rocket

The MSR Pocket Rocket is a similar stove to the Jetboil, but it requires a little more gear than the stove itself. This stove is much smaller and compact, but you will need to have a separate pot or pan of some sort. The Pocket Rocket also does not have an ignitor, so you will need a lighter or matches.

To use the Pocket Rocket you simply attach the stove to the fuel canister, turn the knob counter-clockwise, and strike your match about an inch away from the burner. Once your water boils, simply turn the knob clockwise to turn off the burner.

Factors That Influence Heating Time

The expected waiting time is only an estimate. Water heaters are affected by various factors that influence how long they take to heat up. Some are universal across the different types, while others are more specific.

1. First Hour Rating

The first-hour rating tells you the number of gallons the water heater can deliver within the first hour. It illustrates the ability of the water heater to heat an entire tank to the desired temperature (4).

A high first-hour rating means a shorter waiting time. The given number depends on the fuel source, tank capacity, and the size of the heating elements or burners (5).

2. Size of Water Heater

The size of your water heater is another factor that can shorten or prolong the heating time. As mentioned earlier, a larger tank takes longer to heat up. This is simply because there’s more water to heat.

Larger tanks will generally have two heating elements or a large burner to speed up the heating time. Still, a smaller tank will heat up more quickly.

On the other hand, a smaller tank will run out faster than a larger tank. You will have hot water sooner but you are also more likely to run out of it during even minor tasks.

3. Inlet Water Temperature

The inlet water temperature, or temperature rise, is another factor that can significantly influence the recovery time. Depending on where you live, the inlet water will be at different temperatures. It is generally colder up North than in the South.

When we say “temperature rise,” we refer to the difference between the incoming water and the preset temperature on the boiler. The colder the inlet water, the longer it takes to heat up.

4. Fuel Type

The fuel type makes a big difference to recovery time. Gas water heaters are a lot faster at heating water than their electric cousins. This is because gas burners reach a much higher temperature than electric heating elements.

Schedule an Evaluation to Further Diagnose the Lack of Hot Water

If you’re wondering why it’s taking so long to get

If you’re wondering why it’s taking so long to get hot water in your home, contact the experts at Home Climates. We help residents of Central, PA with all their heating and cooling needs and offer 24-hour emergency service, flat-rate pricing and a 10-year parts-and-labor warranty on all of our products and services. Call us today at 717-689-4151 or complete our online contact form to learn more about your water heating system or to get a free estimate.


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