Hi all, I've searched and searched on this subject, but can't ever find an answer to my questions. We have a traditional wood fireplace that we converted to gas last winter. It's a typical vented gas log setup -- and we hate it. It doesn't provide any heat, we get gusts of exhaust down the chimney, and never use it. After doing research, it seems that Direct Vent is the solution for an alternative heat source (feel free to chime in if I'm wrong!). I found this site with multiple installation diagrams: https://www.chimneysweeponline.com/hodvent.htm I'm planning on doing #6 or 7, but was wondering if it was possible to do a horizontal vent through the back of the masonry chimney. That would save some cost on all the conversion kits and flex piping I would need to buy. If that's possible, how would I go about doing it? Or, is it possible to just build a block-off plate to replace the damper like this article: https://www.hearth.com/econtent/index.php/articles/making_a_block_off_plate/ If I went this route, would I even need to buy flex piping to go all the way to the termination cap (2 story chimney), or is the chimney sufficient for the exhaust/draw air. Thanks!