I was screwing around with my Regency R14 insert this weekend toying with it. With ONE average size split about 16 inches long and about 6 inches wide of ash, I was getting 4 hours burn time with the blower on low and the damper turned down about 75%. I was really surprised with how long it lasted, has anyone done this before and does this sound about right as far as burn times go. If it wasn't me I would not have believed how long it lasted. Thanks for the input!