Dude you actually pulled out the heat exchanger to show us. What a gentleman lol

Finally, fantastic video, we have that Lenox, we collect the draing water in a big pot for the plants in the winter, usally it just runs over to the cellar drain

Probably one of the best instructional videos I’ve ever seen. I fix industrial culinary equipment but needed a crash course in the condensing furnace special features. I’m going to tear into mine when I get home tonight.

Not into hvac work myself but this presentation is amazing and extremely detailed. Learned a lot to about the unit in my house. Thanks!

I'm hvac tech, went to school and all that. Watching your videos from trade school you were teaching and now that taking the time and uploading these valuable hands on training which is by far is the best. God bless and keep up great work. As you say you are visual guy. Nothing beats these phenomenal info than abstract from books.

Everything you talk about is so easy to understand and enjoyable. Thank you.

Ty is an excellent teacher! I’m not even an HVAC tech but I’m glued to the screen.

Thank you, I have learned more with you than the school with you. I learned 90%, a lot, a lot more than the school. I'm even already installing units.

Dr. Branaman, thank you for the total anatomy of the high efficient furnace. This is the best detailed description. I am glad that I ran into this site. Now I feel confident to take my furnace apart and assemble it back.

I wish my HVAC installer would have watched this video. It took 7 years for them to install it correctly without exhaust leaks, electric issues. I think I'll get licensed to do my own HVAC work from now on.

Couple time watcher, first time caller..... Only video I found with the 4 pressure switch Lennox. I have been messing with furnace for two winters. After watching your video and reading the whole manual as you mentions, I might have found my problem. The red silicon hose is not tight on the fire box. Put a little zip tie on both ends (box and pressure switch) and the furnace has been problem free for two weeks. Will replace all hoses soon. A BIG THANK YOU!!! 👍 Keep up the great videos!

I wanted to thank you for taking your time on going about this furnace, it’s an excellent tutorial & very informative.

I have taken many classes on HVAC and this one does the best to explain 90+% furnaces. And the Art work is a huge plus BTW

Hey dude! I'm not an hvac tech but over the years have watched your course a few times and I just wanna say thank you and let you know it has been useful in my professional career

TY, you are the best teacher. you make this furnace so easy to understand. Im a full time

We just got one installed and I was curious about how they worked, thanks! This was very useful!

Thank you so much! Highly educational video. I have learned so much from watching your videos. Please keep posting.

Ty, another Awesome video. It’s comforting to know that there are great teachers like you, who have a formal education in their subject, knowledge, experience , and teaching ability and are totally committed to actually teaching the students.

Excellent. A very detailed and informative video. I know so much more about how these system works now.

Sensational teacher, super thorough video, big thank you