Anyone here install them? I'm having problems with mine. Its a year old demo unit. Direct Vent style. First time hooking up. I told the Fireplace store I bought it from and they told me what I needed for exhaust. Out of the stove I have 12" vert, 90* elbow and about 16" out the wall to a Termination cover. I beleive I am having a lack of a good draft. It wont stay lit for longer then a few seconds and you can see it burning it self out. If you open up the glass front It burns awesome. So I closed it all back up and set a fan outside forcing air towards the intake. Fired it up , closed the glass back up and it stayed running. unplugged the fan and it went right out.

Draft issue?

Thanks
Rick