I was doing cartwheels down the hallway when I found out that today it was going to be 21 degrees. The last few days I only saw a high of single digits, night time in the negatives. I still haven't made my upgrade though, I am still burning an old (1980) Majestic ZC fireplace. At least it does have a large firebox and a blower. I also have a good layout in my house for wood heat (tri-level house), and was luck to see 65 degrees the last few days, but I had to burn an ungodly amount of wood.