I have a newly installed Harman PF100. Since starting to use it last weekend, I have a very noticeable smoke smell coming out of the forced hot air heat supply vents in my house. can't see smoke but can smell it all the time if the blower motor is supplying heat to the house. All vent pipe seams are selaed with metal tape and the adapter to the exhaust nipple on the furnace is sealed with high temp silicon. I did notice the fire compartment door latch at the top seems to have more grab than the bottom. Could the door seal possibly be leaking by and letting smoke into the hot air supply side somehow? The fire is not lazy at all, but is straight up, not slanted toward the heat exchanger accordion tubes. Any suggestions are appreciated.