How Long Does It Take To Heat Up A 110v Hot Tub?

This question assumes that the user is using a 110v, 50Hz standard household outlet.

The “how long does it take to heat up a hot tub for the first time” is a question that many people have. The answer is that it depends on how much water you want to heat, and how big your hot tub is.

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If you’re considering about buying a hot tub or going someplace that has one, you may be curious about how long it takes to heat up. You’ll need to prepare ahead of time to get your hot tub to the proper temperature at the right moment. 

A 110v hot tub will typically heat one to two degrees each hour. It might take anything from a few hours to over a day to achieve optimal temperatures, depending on the initial temperature of the hot tub water. 

When it’s freezing outdoors, hot tubs are ideal for relaxing and warming up. Whether you’re filling your hot tub with cold water for the first time or adjusting the temperature a few degrees, you should know how long it will take for the temperature to reach a comfortable level. Continue reading to find out how to schedule your hot tub heating time.



Contents Table of Contents

  • What Does Voltage Mean in a Hot Tub?
  • Per Degree, How Long Does It Take To Heat?
  • What Size Hot Tubs Can 110v Support?
  • The First Time You Heat Your Hot Tub
  • How to Maintain the Temperature of Your Hot Tub
  • Putting the Pieces Together


What Does Voltage Mean in a Hot Tub?

Typically, hot tubs are either 110v or 220v. The voltage variances are frequently associated with the necessity for a different kind of connection to connect the tub to the power source. A 110v hot tub may be connected directly into a standard wall socket. A 220v or higher hot tub, on the other hand, must be directly connected to electricity in your home’s main circuit breaker box. 

A 110v hot tub is more simpler to set up and use, but it heats much more slowly than a 220v hot tub, which is more powerful but more difficult. 

Per Degree, How Long Does It Take To Heat?

The rate at which your hot tub warms up is influenced by a number of things. When determining how long it will take to heat your 110v hot tub, keep the following considerations in mind:

  • Keep the hot tub cover on during heating for the best heating speed and power efficiency.
  • If it’s warmer outdoors, the hot tub will heat up quicker.
  • Hot tubs that are smaller will heat up quicker than those that are bigger.

Even with these considerations, a 110v hot tub will heat up by one degree every 30 to one hour. Hot tubs that run on 220 volts heat up quicker, around one degree every 10 to 20 minutes. Check out our guide on finding the ideal hot tub temperature.


What Size Hot Tubs Can 110v Support?

The length of time it takes to heat a hot tub varies based on a number of variables, including the hot tub’s size. Hot tubs are typically sized according to the number of people they are intended to accommodate. The following are the three sizes of hot tubs:

  • 2-4 persons may be accommodated in a small space.
  • 5-6 persons may be accommodated in a medium-sized room.
  • Large: Can accommodate up to 7 people. 

Small and medium-sized hot tubs are the only ones that need 110v power. There are no large-scale hot tubs that use a 110v connection since the voltage is insufficient to heat the whole tub without overworking the power source. 

The First Time You Heat Your Hot Tub

When The First Time You Heat Your Hot Tub, or for the first time each year, you will be raising the temperature from an average temperature, around 55 degrees, to around 102 degrees. A 110v hot tub will take one to two days to reach optimal temperatures from this starting point. 

Keep in mind that the beginning temperature might be affected by ambient temps. It will take less time to heat your hot tub to a comfortable temperature if you are heating it in a warmer climate with a warmer beginning temperature. In the same way, heating the hot tub in frigid weather will take longer. 

How to Maintain the Temperature of Your Hot Tub

Because heating your hot tub from lower temperatures may take a long time, we’ve created a list of guidelines to assist you keep your hot tub temperatures as consistent as possible. 

When not in use, keep the lid on and secure it.

When purchasing a hot tub, it is essential to get an insulating cover of good quality. A sturdy cover will not only keep the temperature in your hot tub consistent, but it will also keep the water from evaporating. 

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Make sure the lid is closed and secured while the hot tub is not in use. This will ensure that the temperature does not fluctuate. By sealing everything tight and fastening the lid in the closed position, you also prevent any warmth or moisture from escaping. 

Maintain a high temperature 

If you do not use your hot tub on a regular basis, you may believe that disconnecting it and letting it cool down would save you energy. If you just intend to use the hot tub once or twice a month, this strategy will suffice. It is preferable not to let this happen if you intend on utilizing the hot tub more regularly.

Leaving the hot tub plugged in and set to a warm temperature, such as 95 degrees or higher, will normally save you more energy. Then, if you want to use the hot tub, you may set it to a higher temperature a few hours ahead of time, and it will be ready when you arrive. 

This saves electricity in the long run since you won’t have to run the hot tub from cold to hot for tens of hours every time you use it. The hot tub will simply run for a few minutes every few hours to maintain a temperature of roughly 95 degrees Fahrenheit, or whatever setting you want. 

Choose a Good Spot for Your Hot Tub

When deciding where to put your hot tub, choose a location that is protected from the wind. This will assist maintain a suitable temperature by preventing the hot tub from losing heat while in use. 

You’ll also want to make sure the hot tub isn’t below a dripping roof or canopy edge. Not only would being dripped on while in the hot tub be unpleasant, but it may also damage the cover and affect the hot tub’s temperature. 

Finally, if you live in a cold climate, it would be best to situate your hot tub in a spot that receives southern exposure, particularly in the winter. This arrangement will aid in melting snow from the hot tub and maintaining warm temperatures. 

Make Sure Your Water Doesn’t Freeze

If you reside in a region with below-freezing temperatures, even if you don’t intend to use your hot tub at all during the winter, you’ll need to keep the heat set to at least the lowest setting. 

The last thing you want is a hot tub that is entirely frozen and full of water. This not only prohibits you from using your hot tub until it melts, but it may also do significant damage to the tub’s electrical components. You won’t be able to just switch on the heater to melt the ice if this occurs since the engine and jets will be frozen. You’ll have no choice but to wait till the hot tub dissolves. 

You’ll want to do this not simply to avoid damaging the hot tub, but also because you’ll want to utilize it in the winter! Sitting in a warm and cozy hot tub when it snows may be a lovely experience. You don’t want to lose out on such a chance due to a frozen hot tub.

Putting the Pieces Together

110v hot tubs heat up one to two degrees each hour on average. If you start with cold or lukewarm water, this might take a long time. You can schedule everything properly so that your hot tub at the correct temperature when you want to use it by following our advice and calculating how long it will take to heat it. 

Follow our advice to effectively heat and utilize your hot tub! 


A hot tub will take a while to heat up in the winter. The time it takes depends on the size and type of your hot tub. Reference: how long does it take for a hot tub to heat up in the winter.

Frequently Asked Questions

  • why is my hot tub taking so long to heat up
  • how long does it take to heat up a 220v hot tub
  • how to heat up a hot tub faster
  • how long does it take for a hot tub to heat up 10 degrees
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