How does it work?

Is the water actually heated by the SunnyTent?

We’re asked this question quite often. The answer is: yes! To illustrate this, below you’ll find the temperature profile of the pool water of the (cold) summer of 2016. At the time, some of our Dutch and Belgian customers measured their pool water temperature (without additional heating) daily for us. This led to the following average temperatures:

Juni

  • 04 june 2016: 27,8 °C (pleasant weather)
  • 05 june 2016: 28,1 °C (pleasant weather)
  • 06 june 2016: 28,6 °C (pleasant weather)
  • 07 june 2016: 29,0 °C (pleasant weather)
  • 08 june 2016: 28,9 °C (pleasant weather)
  • 09 june 2016: 28,9 °C (pleasant weather)
  • 10 june 2016: 29,1 °C (pleasant weather)
  • 11 june 2016: 29,0 °C (pleasant weather)
  • 12 june 2016: 28,9 °C (pleasant weather)
  • 13 june 2016: 28,3 °C (pleasant weather)
  • 14 june 2016: 26,7 °C (dark and cold weather)
  • 15 june 2016: 25,6 °C (dark and cold weather)
  • 16 june 2016: 25,4 °C (dark and cold weather)
  • 17 june 2016: 25,3 °C (dark and cold weather)
  • 18 june 2016: 25,1 °C (dark and cold weather)
  • 19 june 2016: 25,0 °C (dark and cold weather)
  • 20 june 2016: 25,2 °C (dark and cold weather)
  • 21 june 2016: 25,2 °C (dark and cold weather)
  • 22 june 2016: 26,1 °C (pleasant weather)
  • 23 june 2016: 27,0 °C (warm)
  • 24 june 2016: 26,8 °C (dark and cold weather)
  • 25 june 2016: 26,6 °C (dark and cold weather)
  • 26 june 2016: 26,0 °C (dark and cold weather)
  • 27 june 2016: 25,5 °C (dark and cold weather)
  • 28 june 2016: 25,5 °C (pleasant weather)
  • 29 june 2016: 25,3 °C (dark and cold weather)
  • 30 june 2016: 24,9 °C (dark and cold weather)

July

  • 01 july 2016: 24,4 °C (dark and cold weather)
  • 02 july 2016: 24,5 °C (cold, showers, partly cloudy)
  • 03 july 2016: 24,4 °C (cold, showers, partly cloudy)
  • 04 july 2016: 24,8 °C (chilly, partly cloudy)
  • 05 july 2016: 24,6 °C (dark and cold weather)
  • 06 july 2016: 25,0 °C (chilly)
  • 07 july 2016: 25,7 °C (chilly)
  • 08 july 2016: 26,0 °C (pleasant weather, partly cloudy)
  • 09 july 2016: 27,1 °C (warm, partly cloudy)
  • 10 july 2016: 28,2 °C (warm, partly cloudy)
  • 11 july 2016: 28,0 °C (pleasant weather, partly cloudy)
  • 12 july 2016: 27,1 °C (chilly, partly cloudy)
  • 13 july 2016: 26,6 °C (chilly, partly cloudy with showers)
  • 14 july 2016: 26,3 °C (chilly, partly cloudy)
  • 15 july 2016: 26,3 °C (pleasant weather, partly cloudy)
  • 16 july 2016: 26,1 °C (cloudy)
  • 17 july 2016: 26,2 °C (pleasant weather, partly cloudy)
  • 18 july 2016: 26,9 °C (sunny, pleasant weather)
  • 19 july 2016: 29,0 °C (sunny and warm)
  • 20 july 2016: 31,4 °C (sunny and hot; tents usually open)
  • 21 july 2016: 31,7 °C (sunny and hot; tents usually open)
  • 22 july 2016: 31,5 °C (sunny and hot; tents usually open)
  • 23 july 2016: 30,9 °C (warm, partly cloudy)
  • 24 july 2016: 30,1 °C (warm, partly cloudy)
  • 25 july 2016: 30,0 °C (warm, partly cloudy)
  • 26 july 2016: 29,8 °C (pleasant weather, partly cloudy)
  • 27 july 2016: 28,9 °C (partly cloudy, mediocre summer weather)
  • 28 july 2016: 28,2 °C (rainy, cool)
  • 29 july 2016: 27,7 °C (chilly, partly cloudy)
  • 30 july 2016: 26,7 °C (chilly, cloudy)
  • 31 july 2016: 26,2 °C (chilly, cloudy)

August

  • 01 august 2016: 26,1 °C (chilly, cloudy)
  • 02 august 2016: 25,4 °C (rainy, cold)
  • 03 august 2016: 25,0 °C (rainy, cold)
  • 04 august 2016: 25,0 °C (chilly, cloudy)
  • 05 august 2016: 25,1 °C (chilly, cloudy)
  • 06 august 2016: 25,1 °C (chilly, cloudy)
  • 07 august 2016: 25,0 °C (chill, cloudy)
  • 08 august 2016: 24,9 °C (chilly, cloudy)
  • 09 august 2016: 25,0 °C (chilly, cloudy)
  • 10 august 2016: 24,7 °C (extreme cold, rainy)
  • 11 august 2016: 24,0 °C (extreme cold, rainy)
  • 12 august 2016: 24,0 °C (chilly, cloudy)
  • 13 august 2016: 24,1 °C (chilly, cloudy)
  • 14 august 2016: 24,3 °C (chilly weather, partly cloudy)
  • 15 august 2016: 24,5 °C (pleasant weather, partly cloudy)
  • 16 august 2016: 24,9 °C (pleasant weather, partly cloudy)
  • 17 august 2016: 25,6 °C (sunny and pleasant weather)
  • 18 august 2016: 26,0 °C (sunny and pleasant weather)
  • 19 august 2016: 26,0 °C (cloudy and pleasant weather)
  • 20 august 2016: 26,1 °C (pleasant weather, partly cloudy)
  • 21 august 2016: 25,7 °C (chilly, cloudy)
  • 22 august 2016: 25,5 °C (chilly, cloudy)
  • 23 august 2016: 26,2 °C (sunny and warm)
  • 24 august 2016: 26,8 °C (sunny and warm)
  • 25 august 2016: 28,4 °C (sunny and warm)
  • 26 august 2016: 28,9 °C (sunny and warm)
  • 27 august 2016: 29,0 °C (sunny and warm)
  • 28 august 2016: 29,0 °C (sunny and pleasant weather)
  • 29 august 2016: 28,7 °C (cloudy, rainy)
  • 30 august 2016: 28,0 °C (cold night, followed by Sunny and pleasant weather)
  • 31 august 2016: 28,0 °C (cold night, followed by Sunny and pleasant weather)

September

  • 01 september 2016: 27,8 °C (cold night, followed by Sunny and pleasant weather)
  • 02 september 2016: 27,2 °C (cold night, followed by Sunny and pleasant weather)
  • 03 september 2016: 26,7 °C (cloudy and pleasant weather)
  • 04 september 2016: 26,1 °C (cloudy, somewhat cool)
  • 05 september 2016: 26,2 °C (pleasant weather, partly cloudy)
  • 06 september 2016: 26,4 °C (pleasant weather, partly cloudy)
  • 07 september 2016: 26,5 °C (pleasant weather, partly cloudy)
  • 08 september 2016: 26,5 °C (sunny and warm)
  • 09 september 2016: 25,9 °C (sunny, warm, cold night)
  • 10 september 2016: 25,7 °C (sunny, warm, cold night)
  • 11 september 2016: 25,0 °C (cloudy and pleasant weather)
  • 12 september 2016: 25,1 °C (sunny and warm)
  • 13 september 2016: 25,2 °C (sunny and warm)
  • 14 september 2016: 25,1 °C (sunny and warm)
  • 15 september 2016: 25,0 °C (sunny and warm)

But also if we go further back in time (May 2016), …..

  • Swimming pool of 20,000 liters
  • Tuesday evening (3 May), filled with tap water (after 13 hours!); water temperature 14°C
  • Tuesday night (3 – 4 May), very low outside temperature (thus potentially strong water cooling)
  • Wednesday late afternoon (4 May 4), water temperature 18°C (mixed, not just the top layer).
  • Wednesday night (4 – 5 May), again low outside temperature
  • Thursday late afternoon (5 May), temperature (mixed) 22°C
  • Friday late afternoon (6 May), water temperature (mixed) 25.5°C
  • Saturday late afternoon (7 May) water temperature (mixed) 26,2 °C.

So yes, it really works!

Tips: 

  • When the sun shines, during the day, turn on the pump, so that the heated upper layer (water) mixes well with the colder layer. This will maximise the heating up of all the water.
  • After swimming, quickly close the tent to get maximum heating up of the pool water.
  • In the evening and at night do not turn on the pump. This is because still water gives off the least heat. Compare it to a cup of tea: if you do not stir, the tea stays hot much longer than when you do stir.

Oh yeah …. Did you know that the film of the SunnyTent is thermal? This means: heat-dispersion-inhibiting. Therefore the water stays warmer, even on cold nights.