i want to install a first time shower for this house. i think the heating system we have is a fire place back boiler in the kitchen. in the airing cupboard theres a hot water tank and above that is a cold water tank but i do not think this is used for the cold water for the taps as the water inside this tank looks like its been stationary for a while and unfit for tap water. i think all cold water taps are feed from the mains. Does this sound right for water systems? and is a power shower the best option or an option at all. I dont want to have to install a electric shower at the fuse box is located 2 floors down and to power this would be a bug elecrical wiring job. If any could help i would much appreciate this. i can provide pictures of my system if this would help.