Can I use the Nano FI heat pump for an above-ground pool?
Yes. The Poolex Nano FI is specifically designed to heat small above-ground pools.
There are a few factors to consider before making your choice, including your pool size, what water temperature you would like, the average outside temperature where you live and how long you would like to use your pool, please head over to our heat pump size guide for more information on choosing the correct size heat pump for your pool.
What are the main features of the Nano FI heat pump?
Plug & play setup: Plugs directly into an RCD protected socket
Smart connectivity: Features built-in Wi-Fi for remote smartphone control
Universal fitting: Compatible with standard 32mm and 38mm pool hoses
All weather reliability: Includes an automatic defrost system and dual heating/cooling modes
Durable build: Equipped with a corrosion-resistant titanium heat exchanger, making it safe for both salt and chlorine pools
How energy efficient is the Nano FI?
The Poolex Nano FI is very economical, featuring Full Inverter technology that continuously adjusts the compressor and fan speed to maintain a stable temperature, providing a Coefficient of Performance (COP) of 6.0 at water and air temperatures above 26°C. This means that for every £1 spent on electricity, the unit delivers up to six times the heat output into your pool (COP drops when the outside temperature is cooler).
Will the Nano FI fit in a small garden or patio?
Yes. The Poolex Nano FI features a compact footprint designed specifically for tight spaces, small gardens, and patios. Additionally, the Full Inverter technology means the unit is whisper-quiet to ensure it does not disturb you or your neighbours.
Can the Nano FI heat a pool in cooler weather?
Yes. The automatic defrosting function will prevent ice build-up on the back of the unit without requiring manual intervention, however the ability to heat efficiently at lower air temperatures will depend on the size of your pool and the water temperature you require.
We are more than happy to advise on the correct size heat pump for your pool or you can head over to our heat pump size guide for more information.
Should I insulate my pool?
If you are thinking of heating your pool you should cover the pool when not in use as 80% of heat loss occurs through surface evaporation, a separate solar or bubble cover is a worthwhile investment if you don’t have an existing cover.
With an above ground pool it is especially important to keep it covered as these pools are not well insulated against heat loss – additional insulation around the sides and bottom of an above-ground pool can help to retain valuable heat – in fact properly insulating your pool can extend your season or even reduce the size of heat pump required.
What is COP?
COP stands for Coefficient of Performance. Simply put, it is a ratio that tells you how much heat you return to your pool for every unit of electricity you pay for.
How it Works
If a heat pump has a COP of 5.0 it means: input 1kW of electricity, output 5kW of heat, you are essentially getting 4kW of free heat extracted from the ambient air.
Why Air Temperature Matters
Heat pumps are aerothermal, meaning they pull heat from the surrounding air, because of this, the COP changes based on the weather.
Warm weather (e.g. >24°C), the air is full of heat energy, making it easy for the pump to achieve a high COP (like 5.0 or higher).
Cooler weather (e.g. <15°C), there is less heat available in the air. The pump has to work harder, which lowers the COP and reduces the total heat returned to your pool.
Expert Tip: When choosing a heat pump, don't just look at it's maximum COP, consider the air temperatures during your specific swimming season. A pump that is powerful enough for July might struggle in May or September.
You can refer to our Heat Pump Sizing Guide to ensure you select the correct capacity for your pool size and desired swimming season.
