The higher temperatures are usually reached closer to the center of a cubic meter heap. Field mowings and crops purposely planted for composting would also be composted for eventually being added to the garden rows. Not something I would rely on to heat a cabin with, but would work well for warming a coldframe greenhouse - or for warm fall showers. The cubic meter composting bin that I have is 1/4 full - waiting for it to thaw so i can turn it over and heap it - just looking to get dirt from the compost at the moment :)

"A hot compost pile can reach temperatures of 49-77 degrees Celsius (120-170 degrees Fahrenheit)" -
https://www.permaculture.co.uk/readers-solutions/how-make-hot-compost