We at Vogelzang would like to apologize for the drawbacks you have encountered with your Model VG650EL stove. Hopefully we can offer some helpful hints to allow you to enjoy your Mountaineer and keep it operating at optimal performance. When you open the stove door, a lot of dilution air must flow through the opening to keep the smoke inside; if the exhaust flow is restricted, smoke will roll out into the room. Back-draft can also happen if the chimney penetrates the warm part of your home below its highest level. While the firebox is a 23”x 14” and able to hold a up to a 22” log, the stove is designed to heat quickly and consistently up to 2,000 square feet. Also we do recommend burning good seasoned wood in order to get the best burn from your stove, especially since you are located at over 4,000 ft. If we can offer any help feel free to contact our Customer Care Center at 1-800-750-2723.