Our Impact Case Studies Thistles Garden Centre During Autumn 2018, Thistles Garden Centre installed an 11.73kW roof mounted PV system together with an 11kWp Air Source Heat Pump on a new building at the Centre. Thistles Garden Centre provides occupation and education services for adults with learning difficulties. Many of the users have medical conditions meaning they are vulnerable to cold. The effective new heating means they will be able to keep coming even in the coldest weather without a detriment to their health. The savings made on energy bills all go straight back into Centre to extend and enhance its services. Read more information about this project here.