A 6mm foam cover is not a solar gain cover and any energy gain from solar radiation is not taken into account. These figures were obtained over a 36 hour period and the figures given are the average.

Pool temperature 24°C.
Air temperature15.6°.
Humidity 71%
Wind speed 1ms-L

Outdoor pools can lose up to 10kwh per m²surface area

These figures were obtained over a 36 hour period and the figures given are the average.

Pool temperature 27°C
Air temperature 28° C
Humidity 60%

Indoor pools can lose up to 4Kwh per m² surface area