Rafal Kaczynski
Dear Marina if you are sure that flue can not be install I would suggest to install Unvented Hot Water System with a 200-300 litres cylinder which would work for DHW and CH as well. UHWS are operated by electricity ( immersion heaters are in cylinder) and hot water flow is same as cold water supplied to your home. Requirements for water pressure is 1.5 bar so if you have this pressure minimum supplied to your house you can install this kind of system. Advantage of fitting UHWS is that hot water is same at all the times in any draw off points in your home. I hope this help. Regards Rafal
