Air source heat pumps have emerged as an efficient way to heat hot tubs, offering significant energy savings over traditional electric or gas heaters. Lakeland Spas Services & Repair can service, repair, supply & install a heat pump for your hot tub. Contact us today and we you can start saving money.
Leading hot tub heat pumps are typically inverter-based units from reputable brands, known for reliability, high efficiency, and positive user feedback. Inverter technology allows the compressor speed to vary, boosting efficiency and quietness compared to older on/off units
Air source heat pumps for hot tubs require a higher upfront investment but offer major energy savings over time. A conventional electric immersion heater has a COP (Coefficient of Performance) of 1 (100% efficient: 1 kW of heat per 1 kW of electricity). By contrast, heat pumps often have COP values between 3 and 6 in typical conditions (300–600% efficiency), meaning far more heat output per unit of electricity. In fact, an average ASHP may have an efficiency around 350%, and top models can reach COP 8–13 in ideal warm ambient conditions.
This boost in efficiency translates to lower running costs. For example, heating a spa with a standard electric heater might cost about 20.06 pence per kWh, whereas using an air source heat pump can cost roughly 5.73 pence per kWh– about a 75% reduction in energy cost. In real-world hot tub tests, owners saw daily heating costs drop from ~£2 per day to ~£1 per day after adding a heat pump. That kind of savings (on the order of £300–£500 per year) is typical, meaning the investment pays back in a few years.
Installing an air source heat pump on a hot tub involves some planning and possibly professional help. Key requirements include adequate space for the unit, proper electrical supply, and integration with the hot tub’s plumbing.
