Hi - We have a Dovre 2100 that has served us well for 20+ years. We're in the San Joaquin Valley of California, with some of the worst air in the US. Burn days are tightly controlled, unless you have a newer qualified model. I'd like to install a freestanding wood stove in the "alcove" but I'm rather confused about clearance issues. Is there a logical reason that I can't just pull the Dovre firebox and leave the surround? Also, the existing 2100 deg. flue seems to be in excellent shape. Reuse or replace? Thanks for any help!