The quality and insulation value of the hot tub cover This is one of the main areas where cheap grey imports fall down, as they scrimp on the areas that are out of sight, like insulation and the build quality of the spa frame. But apart from the equipment panel, the more insulated a hot tub – and the higher quality the insulation – the better. The only area of the most efficient spas on the market that isn’t insulated is the equipment bay, as the pumps and control box needs to be ventilated and easily accessible for service. So, look out for spas insulated with multiple layers of high-density, water-repellent, closed-cell polyurethane foam to keep heat loss and running costs as low as possible. Hot tubs with high-density foam hot tub insulation are the kindest on your smart meter readings. The insulation materials used inside the cabinet of the hot tub around the underside of the shell and the area around the plumbing system can make a huge difference to its electrical running costs. How well insulated the hot tub cabinet area is See our guide on small hot tubs if you think a more compact option will work for you. Unless you need a huge party spa, there’s no point buying a hot tub that is much bigger than you need for your average number of regular bathers. The more water your hot tub holds, the more it costs to run.Ī good rule of thumb is to choose a hot tub that has around 200-250 litres of water capacity per bather seat. The pumps, air blowers and other electrical components The volume of spa water
The pumps, air blowers and other electrical components For instance, a titanium hot tub heater will conduct heat more efficiently than a stainless steel one so keep an eye out for that in the specifications.Ī recent development in the hot tub industry has been the availability of hot tub air source heat pumps that provide a great solution for helping to reduce hot tub heating costs. However, some heaters use more energy-efficient heating elements to transfer heat more effectively. This ends up being six and two-threes in terms of energy consumption. That’s because a heater with a larger kW rating will heat the water faster, but it won’t need to stay on as long.įor example, if a 1.5kW heater takes two hours to raise the temperature by 1☌, then a 3kW heater would only take an hour. Heaters come in different kW ratings, but this won’t directly affect energy usage. An insulated hard cover on top of the hot tub preserves the water temperature when you’re not using it so you can use your hot tub whenever you like without having to wait for it to heat up. Once your hot tub reaches this water temperature, it stays at this set temperature all of the time. The vast majority of hot tubs use an electric heater to heat the spa water to your preferred ‘set temperature’, which is normally between 37☌ and 39☌. The factors that affect a hot tub’s energy efficiency: The heater
So, be sure to keep this in mind when you’re weighing up how much a hot tub costs, as opting for a cheap model can cost you literally hundreds of pounds ever year. What may seem like a bargain buy at first may have you running for the proverbial hills when your first electricity bill hits the doormat! If you chance your arm on a cheap grey import this daily cost could increase five or six fold, as they are simply not built to retain heat and maintain water temperature efficiently. However, not all hot tubs are built to the most efficient energy standards. The most energy-efficient hot tubs on the market will cost between £1.00 and £1.30 per day at current energy tariffs of around 28p per kWh (updated April 2022). This is also depends on whether you choose a ‘plug and play’ hot tub or a hot tub that requires a dedicated power supply – see our guide on 13 amp vs 32 amp hot tubs. We can however make some assumptions based upon an average use pattern of 30 to 45 minutes use, three or four times a week (which is about average for most people who own hot tubs).
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