Would certainly recommend Impra Has. The quotation proces was brilliant and everything was fully explained by Jason (surveyor). The pricing was much more competitive than British Gas. The installation was completed in a day by Tim and Cameron, who made an excellent job. They explained everything, made sure all our carpets were protected and after they left you would have known that they had been at our property. All the old system, tanks etc were taken away. If you are thinking about using Impra Gas, then I would suggest you request Tim and Cameron to do the installation.