The pool heat pump price for a typical Cape Town family pool starts from around R15,990 for a 7kW unit rated for pools up to 28,000 litres, at the time of writing (October 2026). Bigger pools need bigger units, and a 21kW unit for up to 100,000 litres sits around R42,900. On top of that comes installation, and then the bit that surprises people: the electricity to run it.
This guide covers prices by kW, how to size a unit to your litres, what installation involves, how to estimate running costs on Cape Town tariffs, and why a cover changes everything. For our installation service, see pool heat pumps.
How a pool heat pump works
A pool heat pump works like an air conditioner in reverse. A fan draws outside air over a coil filled with refrigerant, which soaks up heat from the air. A compressor concentrates that heat and passes it to the pool water flowing through the unit, and the water goes back to the pool slightly warmer.
The key point is that it moves heat rather than making it. The ratio of heat delivered to electricity used is called the COP, and for pool heat pumps it usually lands somewhere between 3 and 7 depending on the unit and the air temperature. That is why a “13kW” heat pump does not draw 13kW from your board.
The flip side: when the air is cold, there is less heat to collect and the COP drops. Heat pumps work best above about 10°C air temperature, which in practice means they are strong in spring, summer and autumn and weaker on cold winter nights.
Pool heat pump price by kW
These are third-party market prices from SA online pool shops at the time of writing (October 2026). They are not Kwik Pools prices, and installation is not included.
| Heating output | Market price | Rated pool size |
|---|---|---|
| 7kW | From around R15,990 | Up to 28,000 L |
| 9kW | Around R20,990 | Up to 35,000 L |
| 13kW | Around R25,650 | Up to 55,000 L |
| 17kW | Around R37,990 | Up to 70,000 L |
| 18.7kW inverter | Around R23,495 (EFT) or R30,894 (card) | Up to 60,000 L |
| 21kW | Around R42,900 | Up to 100,000 L |
Two units with similar output can differ a lot in price. What you are paying for:
- Inverter or fixed speed: an inverter unit ramps its compressor up and down. The 18.7kW inverter above draws anywhere from 0.31 to 3.67kW depending on demand, so it sips power once the pool is up to temperature.
- Titanium heat exchanger: standard on decent units and important for salt water pools.
- Low-temperature performance: some units hold their output better in cool air.
- Noise and controls: quieter fans and WiFi control cost more.
- Local support: spares and service matter more than a slightly lower price.
Pool heat pump size: matching kW to litres
The litres rating on a unit is a starting point, not the whole story. Find your pool volume first with our pool volume calculator, then think about the things that make a pool harder to heat.
- Volume: pick a unit whose rating comfortably covers your litres.
- Surface area and wind: heat is lost mainly from the surface, and a windy site loses far more. Summer south-easters over an open pool strip heat quickly.
- Target temperature: heating a few degrees above the natural water temperature needs less than holding it warm into winter.
- Season: the colder the months you want to swim, the more capacity you need.
- Cover: a pool that is covered every night can get away with a smaller unit.
Undersizing is the costly mistake. A small pool heat pump on a big, windy, uncovered pool runs for hours on end and still struggles to lift the temperature. Sizing up a step usually means the unit reaches temperature faster and then idles.
Quick check: if your pool is close to the top of a unit's litres rating, is uncovered or sits in an exposed garden, look at the next size up before you buy.
Want a heat pump sized properly?
Send us your pool size, a photo of the equipment area and when you want to swim. Our team will recommend a unit and quote the installation.
Heat pump installation costs
Heat pump installation has three parts: placing the unit, plumbing it into the filter return line, and the electrical supply. A set installation price is hard to pin down because every equipment area is different, so treat the following as the things that set the quote.
- A level base: the unit needs a solid plinth with clear airflow around it, away from walls that trap cold exhaust air.
- Plumbing: a bypass with valves so you can isolate the unit, fitted after the filter. Longer pipe runs cost more.
- Electrical: most units need their own correctly rated circuit and isolator. That work is for a qualified electrician, who should issue a certificate of compliance.
- Pump and flow: the heat pump needs steady flow, so a tired pump may need replacing first.
- Noise and neighbours: the fan makes some noise, so placement matters near bedrooms and boundary walls.
Our guide to pool heat pump installation requirements covers space, clearance and electrical needs in more detail. If you are on a coastal property, read up on coastal equipment corrosion before deciding where the unit goes.
Pool heat pump running cost in Cape Town
Running cost is simple maths once you have three numbers: the electrical input power while running, the hours it runs, and your tariff. On the City of Cape Town Home User tariff for 2026/27, Block 1 is R3.56 per kWh for the first 600kWh in the month, and anything above that is R4.69 per kWh.
A worked example using kWh, so you can plug in your own tariff:
| Step | Example |
|---|---|
| Heating output | 9kW unit |
| Assumed COP in mild weather | 5, so about 1.8kW electrical input |
| Hours per day running | 6 hours |
| Daily use | About 10.8kWh |
| Monthly use (30 days) | About 324kWh |
| Your cost | Monthly kWh x R3.56, or x R4.69 if it pushes you over 600kWh |
That second tariff step catches people. A heat pump, pool pump and geyser together can push a household over 600kWh a month, and then every extra unit costs the higher rate. Check your actual input power on the unit's data plate, because COP and power draw vary.
The pool heat pump running cost falls sharply once the water reaches temperature, especially with an inverter unit. It is the first heat-up and the cold nights that cost the most. Your pool pump also has to run while the heat pump works, so an efficient pump helps. Our guide on pool pump prices compares single and variable speed options.
Covers and the pool heat pump price you pay to run it
Evaporation is the biggest source of heat loss from a pool. The US Department of Energy notes that covering a pool when not in use is the single most effective way to cut heating costs, with savings of 50% to 70% possible. In Cape Town's wind, that effect is even more noticeable.
A basic solar bubble blanket costs from around R99 per m2 for the material at the time of writing, which is small next to the heat pump itself. Our guide to types of pool covers compares bubble, thermal and safety covers. A cover also cuts water top-ups, which matters with municipal water tariffs.
Pool heating Cape Town style: when a heat pump makes sense
Most Cape Town pools are only comfortable for a few months of the year without help. A heat pump typically adds weeks at each end of summer rather than turning the pool into a winter spa. Pool heating Cape Town style usually means warm water from September to May with a cover on overnight.
If you have a sunny, north-facing roof, solar may do much of the work for very little running cost. Our pool heat pump vs solar heating comparison weighs the two, and our pool heating page covers every option we install.
A heat pump makes most sense when you want reliable heat on cloudy days, have limited roof space, or want the pool warm for a set date. It makes least sense on an uncovered pool you want hot in July.
Pool heat pump price questions
What is the pool heat pump price in South Africa?
At the time of writing (October 2026), SA online pool shops list a 7kW unit for pools up to 28,000 litres from around R15,990, and a 21kW unit for up to 100,000 litres at around R42,900. Installation is extra and depends on plumbing and electrical work. Ask our team for a current quote for your pool.
How much does it cost to run a pool heat pump?
Work out the unit’s input power, multiply by hours run, then by your tariff. On the City of Cape Town Home User tariff that is R3.56 per kWh in Block 1 and R4.69 per kWh above 600kWh a month. A cover and sensible thermostat setting cut the hours a lot.
What size pool heat pump do I need?
Start with the litres rating, then size up for wind, shade and how warm you want the water. A pool that is uncovered, windy or heated into winter needs more capacity than a sheltered, covered pool used in spring and autumn.
Do pool heat pumps work in a Cape Town winter?
Yes, but less efficiently. Heat pumps take heat from the air, so output drops as the air cools, and mid-winter heating of an uncovered pool is expensive. Most Cape Town owners use them to stretch the season into autumn and spring.
Is a heat pump better than solar heating for a pool?
They do different jobs. Solar costs very little to run but depends on sun and roof space, while a heat pump gives controllable heat on cloudy days at the cost of electricity. Some pools use both.
When you are ready, our team can size, supply and fit a pool heat pump to suit your pool and how you use it.
Get a heat pump quote
Tell us your pool size, your equipment setup and the months you want to swim. We will size the unit, check flow and placement and give you a clear quote.
