Just an update. My chimney was installed this week. I am very pleased with the results. I now have a quiet house even when the furnace is running. The 8" of linen closet space I was to loose turned out to be 1/2 the linen closet. Hopefully we will have no leaks or damaged shingles. They had to shovel some snow off the roof as we had 2ft of snow a couple of weeks ago and even with the mild weather and rain still have lots laying around. The only real problem so far, they unhooked the heat pump that we use for air conditioning only and neglected to mark down which wires went where so now they have to get a heat pump man in to wire it up again. All in all I am very pleased with the results and have you to thank for being able to accomplish this. You're doing a real service that is very much appreciated. Thanks again.