No chill just means you're not crash chilling your wort, thrown it in a HDPE water container, often cube shaped, and leave it somewhere cool until it cools down naturally. The real key is making sure there is minimal/no air in it and its sealed TIGHT.
I've left a couple of no chill cubes in the garage for 3 months+ with no ill effects once. I had to change my brewing schedule to get a brew ready for Xmas and to leave an IPA, I then forgot about it in a house move and then found it when I got the whole garage unpacked.
Really great alternative that saves water and takes a lot of time off brew day. Google search 'aussiehomebrewer no-chill' for lots of good info. It's very popular here in Australia simply because of frequent droughts, but even without water restrictions many of us stick with it because its preferable for us.
Electric BIAB is the bomb, can even brew inside if the weather is **** outside - wind rain hail shine or tropical storms.