Just doing a complete rebuild on my darkroom! I was wondering if anyone had any ideas about hot water supply. I only have the option of an electrical supply and I was looking at some of the under-sink compact heaters available. I figure all I need is something that will enable me to provide a supply at around 20 degrees for washing prints - so this equates to a trickle of hot water into a mixer tap with the cold. Does anyone have any ideas here? Thanks for any help.