Thanks for all your incite. Coming down to the wire. Heating 3000 s/f with an un vented 20K gas log fire place in the basement in SE Ohio. Keeping the up stairs around 70 day and 66 at night with a low of 19. Long story short I have most of my parts here and a little on the way. Just have a few questions on certain things. Willing to pay you for your time.