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How Long Does a Hot Tub Take to Heat?

How long it takes to heat up your hot tub can depend on several factors like how large your tub is to how powerful its heating element is. If you’ve recently purchased a hot tub and want to know how long it will take to heat up, check out our article below.

Water Capacity

Hot tubs hold approximately 250 gallons of water and larger models can hold up to 500. All that water takes a while to come up to the right temperature. If you have a standard sized hot tub, you can expect that the water will heat up by 3° to 6° each hour. You can speed up the process by covering the tub with an insulated cover to trap the heat.

External Temperature

If it’s warm outside, the water will take less time to heat up. Conversely, if it’s cold and you don’t have a cover on, it will take ages for your tub to heat up. On a warm day, expect the tub to heat up in 4 hours.

Hot Tub Components

Individual parts of your hot tub like the pump, jets, and heating element will also determine how quickly your tub can heat up. If those components are damaged or worn, it will take longer for the tub to heat up.

Should I Leave My Tub on 24/7?

This is a common question among hot tub owners. There is no perfect answer as each hot tub owner’s situation is different. If you use your hot tub frequently or live in a place where it’s cold most of the year, leaving your hot tub on all the time might make sense for you. That way you won’t need to wait for the water to heat up or worry that your pipes will freeze.

If you don’t use your hot tub much, keeping it on all the time doesn’t make sense. Save some money on your electricity bill by only heating the tub when you plan to use it.

How Can I Reduce My Energy Costs?

If you keep your tub on all the time or not, there are still some tips you can use to help lower your electricity bill each month.

First, invest in a high-quality insulated cover. The cover traps heat and lowers the time needed to heat up the water. It’s also a practical safety measure if you have kids or pets.

Next, landscaping the right way around your tub can also increase its energy efficiency. Surround the tub with trees or shrubs to help reduce the amount of heat that’s pulled away. You can also enclose the tub in a gazebo or other enclosure to reduce heat loss.
Finally, taking care of your hot tub by cleaning it regularly ensures that all the parts stay in good working order.

For more information about hot tub heating and different models, download our buyer’s guide.