Many new hot-tub owners think turning off the spa when it’s not in use will save money, but the opposite is usually true.
Why continuous operation is more economical
- Maintaining heat uses less energy than reheating: Once the water reaches your set temperature, keeping it there requires minimal power. Turning it off can mean a full day of heating to get back to bathing temperature, which uses more electricity.
- Avoids filter and water quality issues: When you switch off a spa, water stagnates and the filtration system stops. Stagnant water becomes murky and unhygienic, leading to extra cleaning and refill costs.
- Protects pipes and components: In cold weather, water left in an unpowered tub can freeze and split pipes or damage pumps, causing expensive repairs.
Advice from manufacturers
Manufacturers recommend leaving the tub running to maintain efficiency. Lower the temperature by a few degrees overnight or by up to 10 °C when you’re away. This reduces energy use without letting the water get cold. Focus on low unit rates when choosing an energy tariff.
Exceptions to the rule
- Long periods of non-use: If you’re not going to use the tub for several weeks, it may be more economical to drain, clean and switch off.
- Poor insulation or severe weather: In extremely cold conditions and with poor insulation, some owners lower the temperature more aggressively or drain the tub completely. Make sure the water is fully removed to avoid freezing pipes.
Takeaway
For most UK owners, keeping your hot tub running with a slight temperature reduction between uses is the most cost-effective approach. It protects the tub and provides warm, clean water whenever you want to take a dip.
For great deals on hot tubs, browse our in-stock hot tubs. If your spa needs a service or repair, you can book servicing or book a repair with our trusted team. To keep your tub in top condition, explore our hot tub accessories for covers, steps, cleaning kits and more.
