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). how much of that time is with the jets on.
That’s because its energy consumption depends on so many variables, including: Without getting too technical, it’s difficult to quantify exactly how much of an impact a hot tub will have on your electricity bills.
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