Had a F2450M installed a year ago.....8 months after the install the problems started. Whenever the door is opened fine ash scatters all over the house, also the damper sticks and you have to hit it to move. When the installer was called they worked on it 3 times to no avail and finally agreed with regency to replace the stove, unfortunately we had a major snowstorm the night before and was unable to access the roof. 3 months later the installer closes their doors and Regency now refuses to honor their warranty. At this point it looks like only a legal solution is open....companies today.