We bought an ESSE great but is still sitting there cold, very cold WE visited your facility and supported well, looked after very well indeed, drove up from S Wales Will answer all my questions technically but Im still stuck. why ? I am an engineer You dont know if the unit is installed and working ? No real follow up! I am now working with heating company to install, would rather work with you. Far from perfect Tank design critical but failed with your recomended supplier who would not give us a price. Just could not get a drawing from him after 6 months, right through the winter he kept me hanging on. Sizing coils in tank critical with no data I could not move forward.