I scored a couple free cords of split red oak from a friend, but it is all 20" to 26" long as he cuts for his fireplace and I need it 18" or shorter for my Jotul 550 insert. The web site and manual do say the 550 will take up to a 24" split but realistically an 18" piece is the right size to fit in without having to worry about stuffing it in too tight. This will be my first year burning so I don't know what to do. Should I half it all or cut to a length of say 16" and have a big pile of small splits? This is next years wood as I already have 5 cords for this year. Your thoughts are appreciated.