It is a very long road to reach the 4 yr mark...but oh so worth it! The firewood gods have smiled upon me in recent years with a over abundance of Oak and I set my long term goals to have PREMIUM firewood to feed the BK Princess...the difference between 2yr and 3 yr and 4yr seasoned Oak is huge! The 4 yr lights right off and I am cruising for the night time burn in 10-15 minutes tops...heat output has increased...wood consumption has decreased...I find myself turning the stove down lower than I have ever have done before..this is going to be a great year for me as I am installing all new energy efficient windows and doors insulation and siding starting this week..this was long over due in this leaky old house....cant wait to experience the results of all of this hard and expensive work! lol