The Standard Ash Drawer is mounted on specially engineered runners for a smooth gliding action. The Chinook 30, Sirocco 30, and Ashford 30 are amongst the cleanest wood stoves available with particulate emissions of only 0.80 g/hr. The 2.9 cu. ft. firebox is capable of burning for up to 30 hours on low. 50,000 BTU's Cord Wood Max BTU.