Solartwin was invented and is manufactured in the UK for the UK climate. The main metal used in its manufacture is hydro-electrically made aluminium, with a lower environmental impact than aluminium made using fossil fuel.
For some people, the big picture that includes supporting jobs by buying locally manufactured products can be important. In addition, it is worth examining whether or not a solar collector has been specifically designed for the rapidly changing climate of the British Isles. Lightweight collectors, variable speed pumps, and low volume pipes within them tend to make the best of our short sudden bursts of sunshine.

Solar keymark certified
Micropower council
Renewable Energy Association
Association for Environment Conscious Building