Guys I want to pass along some testing results from the Blaze HE, I finally gave in and swiched completely from the conventional units to a Blaze HE unit.
I can tell you I tested this unit for years before making the switch here is results:
If you burn dry and seasoned wood the results are amazing, I compared my usage from years of using the conventional to the new Blaze unit, i am using less than half.
That is the good the bad is the smaller the split wood i think the better, the amount of ash removed per week is maybe a half gallon or less. The larger the pieces the larger the amounts of ash from what i can tell a 2x4 size seems to about the best to a 4x4. Much larger and more ash.
So this means more splitting of wood i switched my spliter to a 4 point spliter to cut the strokes in half.
I burn it out once a week to clean the chambers. It takes about 15 minutes i use a shovel and an ash vac makes the process pretty painless.
Those are my results having had both types of units.