Another newbie question... What is normal price for install of insert? I'm in SE MA. I've been quoted between $475 plus $250/350 kit depending on chimney height 25'/35' up to as much as $1500 When is the best time of the year to buy? Any thoughts on comparing Accentra vs. Mount Vernon? Made by same company but one is more high tech and bigger. Sometimes more high tech means more problems to maintain and fix. Sound levels of motor much different?