The most efficient way to heat a hot tub or swim spa. Ask us about adding one — it pays for itself in running costs:

• Up to 75% cheaper to heat

  An air source heat pump moves heat rather than making it, so it sips electricity where the built-in heater guzzles it — dramatically lower running costs.

• Around 5kW of heat per 1kW used

  It draws free warmth from the outside air, delivering roughly four to five times the energy it consumes (a COP of ~4–5).

• Warm all year round

  Efficient down to low outdoor temperatures, so your spa stays at temperature through autumn and winter, not just the summer.

• Quieter and greener

  A quiet, weatherproof outdoor unit with a much smaller carbon footprint than heating on the electric element alone.