Flint was formed to undertake research and commercial development in the use of heat pip e technology in Green technology heat harvesting, both solar and waste. Currently heat pipes are typically single cylindrical tubes either used on their own or in multiples. The novel Flint design, called a “heat mat” is for sheets of heat pipes being produced together and acting as a single unit, using a single manufacturing process greatly reducing the production cost and providing an several improved functions including an Isothermic surface. The first stage was a proof of concept study to demonstrate that heat pipes could be made and used effectively to, collect transport and radiate heat. This project took 12 months and was funded by Shell International with a grant of €120,000, whilst the research was funded by Shell they have no legal rights over either the findings or Flint engineering. The testing was carried out by an independent test house, Enertek International. Stage two was to move from a laboratory size test rig using hand built devices to a full scale building system where heat mats could be used to replace the roof of a building. In doing so provide an outer skin to a building which was not only weatherproof but also meet the buildings heating and hot water requirements in a carbon neutral way and demonstrating real world viability. This build and test phase started in September 2013 after the suspenseful award of a grant of €550,000 from DECC under the EEF scheme. This phase is due to be complete by March 2015 with the final tests being completed by the Building Research Establishment at Watford. Draft results are showing as expected that the Flint “roof system” when linked to a heat pump is able to meet the heating and hot water demands of the associated building.