Sorry I am late to the party and am going to be a wet blanket but.........I have installed approx 50 7100's. Your install has many issues, 1) can NOT use mylar duct for OAK to chimney, must be metal. 2) MUST-MUST-MUST use full B-vent for heat zone kit. In testing at 20+ feet away the duct got over 220 degrees, that lead to the requirement of B-vent. 3) Heat zone kit is fan dependant, if you didn't get the fan kit then you didn't get the full heat zone kit, duct work CAN NOT go down, if you lose power and run the stove the duct will overheat and cause a fire, this problem is make far worse if you did not use full b-vent. Please go back and restudy the duct design in the LATEST install manual for a 7100. All duct work must be horizontal or up, never down! 4) The octogon elec box on the back wall must be moved, it is illegal to bury any elec box that can not be accessed. 5) All of that b-vent must have 1" of clearance to combustables. Sorry to be the bearer of bad news. Please restudy the install manual.