What a pool heat pump is and what it does
A pool heat pump is a unit that heats your pool water efficiently. It takes energy from the outside air and transfers it to the water circulating through the filtration system. It does not generate heat by burning fuel; it moves heat from one place to another, just like a domestic heat pump or an air conditioner in heating mode.
The result is that the water stays at a pleasant temperature for longer. In Mallorca, with its mild climate, this can noticeably extend the swimming season and even let you enjoy the pool in winter.
How it works, step by step
The principle is simple and relies on a closed refrigerant circuit:
- A fan draws in outside air and passes it over an evaporator.
- The refrigerant circulating through the evaporator absorbs heat from the air and turns into gas.
- A compressor raises the pressure and temperature of that gas.
- In the condenser, that heat is transferred to the pool water passing through the unit.
- The refrigerant returns to its liquid state and the cycle starts again.
The heated water returns to the pool through the filtration circuit. That is why it is important that the pool pump runs long enough for the water to circulate through the unit.
What it means for the unit to be inverter
Inverter units, like the one in the image, adjust the compressor speed according to the heat demand. This allows more stable, quieter operation and avoids constant starting and stopping. The photo shows a heat pump installed outdoors on a raised base, next to a masonry stairway and a gravel surface, with the side ventilation grille visible.
Pool at 26-28 degrees even in winter
With a correctly sized pool heat pump and a proper installation, it is possible to keep the water at around 26-28 degrees during winter. This makes a significant difference compared with an unheated pool, whose water can drop much lower in temperature.
To achieve this, there are several factors worth reviewing with a technician:
- The pool's water volume and surface area.
- Whether the pool has a cover or thermal blanket, which reduces heat loss.
- The insulation and condition of the pool shell.
- The running hours of the filtration system.
- The location of the unit, with enough space for air intake and outlet.
It is not about switching the unit on and forgetting about it: proper adjustment and basic maintenance make the difference in comfort and consumption.
Why heat your pool now
If you are thinking about enjoying the pool at Christmas or during the cooler months, the time to act is before the cold arrives. A heated pool lets you swim in comfort when most pools are out of use, and it also extends the season in spring and autumn.
Installing the unit in good time also lets you test it, set the desired temperature and check that everything works properly before the days of heaviest use. In a home with a garden, the heat pump blends into the outdoor setting, as shown in the image, provided ventilation distances are respected and it rests on a stable base.
A unit that fits into your installation
The pool heat pump connects to the existing filtration circuit. It does not need a large plant room, although it is worth allowing for a ventilated, accessible space for maintenance. In the photo, the unit sits on a raised base, protected and with the side grille clear, an important detail for good air exchange.
Maintenance and servicing
Like any climate control equipment, a pool heat pump benefits from regular checks: cleaning the grille and evaporator, inspecting the circuit and verifying that the water circulates correctly. Simple maintenance helps the unit work efficiently and allows any issue to be detected in time.
If your pool has not been heated for a while or you are considering installing a heat pump, the most practical step is a technical visit. This allows the water volume, unit location and condition of the installation to be reviewed before making a decision.
At Greentech Balear we install and maintain pool heat pumps in Mallorca, alongside other climate control and aerothermal services. If you would like a heated pool for the holidays or for the coming season, you can request a no-obligation quote through our website.