Dear Hans Joergen Christensen. Having purchased an SV14 for roof mounting on our 60 m2 summer house we now receive a welcome heating supplement – especially during the spring and autumn periods. At the same time the SV14 improves the indoor climate during the cold winter months when it supplies partial heating to the otherwise cold house and replaces the still air with fresh in a natural way. Indoor we measured the incoming air to be 24ºC when the outside temperature was only 0ºC! A pity that the knowledge of this air based solar collector is not more widespread as so many people could benefit from its qualities. It is a brilliant product which certainly lives up to all the promises made, and it is highly recommendable for many purposes.
Kind regards, Lone and Kurt Rise