I do one wash each week. Everything goes in, socks underwear, shirts, bedding even jumpers. They are put on an airer and usually dryovernight.
I only put the CH on when I fel I need it. I only have lights on if I need them. Will have to have new light fittings in the kitchen extension. There are six and these are the only ones I cannot get LED bulbs for. Thet must be about 40 years old as I was still working when they were installed.
I try to be careful with both my gas and electricity consuption.