I have a Yukon Eagle wood/coal furnace that I just burn wood in and was wondering if I could mount the Magic Heat Reclaimer from NorthernTools on the 8" flue pipe that is oriented about 45 degrees upward from the furnace outlet to the hole in the basement wall where it enters the chimney. Info says it must be mounted vertically; any ideas why? Any other flue pipe heat reclaimers available that could be put on the 45 degree, 8" flue pipe? It sure gets HOT when the furnace is burning!! Thanks for any info or advice.