For our prototype system, we used a standard commercially available insulated flexy ducting to connect from the Caracool unit to the supply air vents in the floor (seven in total). Whilst this proved the concept and performance of our system, we have realised that we need a more robust system going forward.

Although the ducting is under the caravan out of the elements, it can still be exposed to the weather, especially high winds. A heavier and more robust solution was needed for the main part of the system.

We have developed a unique twin-wall insulated ducting system that simply pushes together with robust spring clips. Manufactured in the UK from galvanised sheet steel, it is light enough to install, but heavy enough to stand up to whatever the weather throws at it. The system is quick to install and if needed can be easily dismantled. The flexy ducting is now only used to connect from the main ducts to the floor vents.

The weather in the Lincolnshire Wolds over the past few days has been glorious. Towards the end of the evenings it has been so nice to be able to switch on the cooling for an hour or so to cool the caravan down. It makes such a difference to the nights sleep.

We are monitoring the power consumption profile throughout the season. The photo is a screenshot showing the power consumption when the system was switched on at 7.00pm on 17th March in heating. The system peaked at just over 9 amps after only 4 minutes as the temperature inside the caravan rapidly warmed up, and then started to reduced to a lower rate.

Our first system was installed at our caravan in the Lincolnshire Wolds at the beginning of this current season. We have been able to test the system in heating and cooling and the results are fantastic. We no longer use our central heating system for heating. The heat pump is much better. Using the heat pump in cooling when we had the really hot temperatures in June was essential. We were able to cool off and enjoy a comfortable nights sleep.