Professional installers look into flue pipes, condensate drains

https://padlet.com/ericgrek67wvwlq/bookmarks-yt2xn61juaibcqyn/wish/pRxDZ4O4zlbNQ183

Professional installers look at flue pipes, condensate drains, and go back air sizing to prevent moisture considerations and make sure lengthy-time period furnace reliability and protection.