How much does it cost to run a portable air conditioner, and how quickly does it cool a room? [Updated with July 2023 price cap]
2023 UPDATE: This was originally written back in 2021, back when electricity was cheap (I was paying less than 14p/kWh). Times have changed, lockdowns lifted, and a war started. I then updated the article in May 2022, I was lucky enough (and still am) to be in a fixed at 18.36p/kWh, but the variable rates…