We have a Quadra Fire insert that was installed in early December and it had been running fine. I was out of town for the last 2 weeks and so it sat idle until yesterday. I had some trouble getting the fire going. With both air controls set on full open, it didn't seem to be getting enough air unless I left the door cracked. I was burning 2 year old oak and some elm that was cut down dead this summer. The wood wasn't hissing so it was not wet. Once the fire did get going, I was not able to get a burn such that no smoke was exiting out chimney. There was always some white smoke. Upon inspection it appeared that only 1 of three tubes at the top of the firebox was introducing air. There was a secondary burn but not like usual. Is it possible that I have something blocing the air intake and if so, how can I check it? The dealer was closed by the time I noticed this yesterday and is closed today. I can talk to him tomorrow, but it is about 10 degrees here and I hate hearing the NG kick on and off all day long. On a side note, I have noticed that the firebrick at the bottom of the firebox is deteriorating. It is no longer a smooth surface when I scrape along it to remove ashes. There are some cracks and gaps now. Do you think I should refrain from burning until I talk to my dealer? Any advice would be appreciated.