Solectair

Your Roof is a Free Solar Collector: - The household roof when exposed to sunlight, even in winter, acts as a large solar collector and the collected heat is stored in the roof space.
Solectair harvests and automatically filters and transfers this stored heat into the house, which will remain warm into the evening and overnight.

Home Test For Heating Suitability: - Solectair can often raise the indoor temperature to around 5 deg below the roof space temperature.