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How much does it cost to run a hot tub?

Hot Tub

Hot tubs are have significantly grown in popularity recently for those lucky enough to have outside space for them. With prices and installation becoming more affordable, many are taking the plunge to purchase one.

Whilst they have become more affordable to purchase, it’s the operating and maintenance costs you have to watch out for.

If you have recently bought a hot tub, or considering purchasing one, you may be concerned about how much power will be required to run it. Hot tubs require a significant amount of electricity to keep the water hot and bubbly.

Costs largely depend on the spec and manufacturer.

The most energy-efficient hot tubs will cost between 75p and £1.00 per day at current energy tariffs of around 12-13p per kWh, According to WhatSpa. Various things can effect this and for the average UK household, we estimate the cost is much closer to £1.50 per day. 

Higher specification hot tubs can cost anywhere from an extra £20 – £40 per month. Factor this price on top of your regular energy bills and it can get quite expensive. These costs are roughly calculated on an average user, so a heavy user can run bills up into the hundreds of pounds.

How to reduce hot tub running costs?

First thing you should do is switch to a cheaper energy supplier. Love Energy Savings can help you find a great value tariff. Our online comparison tool will identify the best tariffs. Plus, our energy experts are on hand to advise you based on your usage and location.

The exact amount of electricity your hot tub will use will depend on a range of factors.

The model of your hot tub

During recent years, hot tubs have become more energy efficient. You should be able to find the kilowatt use per hour in the manual.

The cost of energy per kilowatt you pay

If you have a cheaper energy tariff, you will pay less per unit of use. If you have an Economy 7 tariff, which gives more affordable electricity rates at night, you will pay less to run the hot tub during the night than daytime.

The weather

More electricity is required to warm the water in the hot tub on a cold day.

The size of your hot tub

The more water there is, the more electricity required to heat it.

Insulation of your hot tub

A well-insulated hot tub will store heat better and require less power to keep warm.

Your usage

How often you use the hot tub, and for what duration of time.

How to make your hot tub more energy efficient

There are several ways you can make using your hot tub more energy efficient.

Firstly, consider the hot tub you buy and location carefully. An area protected from the wind can make a big difference. You will lose less heat if your hot tub is behind trees, buildings or a fence that can provide protection against prevailing winds. Choose a hot tub model that has good insulation and efficiency grades.

Adding insulation when you are installing your hot tub improve energy efficiency. Just as we insulate buildings, an insulated hot tub will lose less heat.

Secondly, make sure your hot tub is well-maintained. Clean your filters regularly. Some hot tubs need to be drained and refilled two to three times a year. This can increase your bill, as replaced water needs to be treated.

Make sure your hot tub has a proper custom-made cover. Covers prevent hot water from evaporating. They also stop heat from escaping. Hot air rises, so most of the heat from a hot tub is lost from the top. Keeping your cover in good condition, and making sure it fits your hot tub well, will improve your overall energy efficiency. Using a thermal blanket can also help reduce costs. Thermal blankets sit on top of the water. Like a cover, they also reduce the amount of hot water and air that is lost.

Set the water at a constant temperature, 30 °C is usually recommended. Unlike with most other appliances, it can be more energy efficient to leave your hot tub turned on in between usages. Even if you only use it once a week. Turn your hot tub down to the lowest setting when not in use. Only turn it off if it is going to be unoccupied for more than a couple of weeks. However, remember to turn off the lights and jet blowers when not in use. The blowers are particularly high energy consumers. Follow the manufacturers instructions and ask for advice from the installer to keep your bills low.

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