London-based clean heat technology start-up, Futraheat, has closed a £1.5 million seed round led by Clean Growth Fund, the UK cleantech venture capital fund. The new investment, Futraheat’s first equity raise, will be used to accelerate product development and commercialisation of its heat pump technology as well as to grow Futraheat’s team.  Prior to the seed round, investment had been received from Angel investors to match government grant funding.