Furnace Comparison: Atmospheric Draft, Induced Draft, and Sealed Combustion (and Barometric Dampers) 

Great stuff Corbett. I had discovered your hvac content prior but knew that you were the real deal when I was researching composting toilets and lo and behold you had the best and most in depth review 😂

You may want to clarify that you will find a barometric damper on oil fired equipment, some people don’t know if they have oil or gas equipment.

As a former HVAC tech I approve this video, good stuff 👍🏻

Awesome info and form a rock star !! very well done. Can't believe there are not more views.

Great video! Thanks for sharing. Question: Do it matter where the pvc vent is connected to the wye fitting?

Hello - I need professional advice on directing me to the correct type of contractor or solution suggestion, Please! In summary, my water heater exhaust pipe makes a loud trumpeting sounds when outside winds are above 10+ mph and when they reach 20+ mph it sounds like I'm living in the Tundra inside my house. The Details: it all started several years ago when I replaced my 1970's Nat gas downdraft furnace with an 80% unit. The contractor combined the exhaust from the furnace and water heater using a Y and running a liner up my 1956 masonry chimney. The water tank exhaust pipe is 4" dia. Prior to this the water heater had its own entry into the unlined masonry chimney. Since I live in a small square house, the utility room is in the middle of the house on the main floor. I do not have a downdraft issue and I believe that when strong winds pass over my chimney cap the wind noise is amplified within my house. I think I have excess up draft as my inducer motor spins when the winds are high and the furnace is off. I installed a B-Vent high wind chimney cap without any improvement. I had a recommend HVAC company out, paid a large bill, and got zero results nor suggestions. Please help with any ideas or request more details from me. Thanks in advance. - from Michigan.

Did they have any heat pumps? That's what I plan to install when my furnace needs to be replaced.

Great video! What model/style (natural gas) produces the driest air?

I have a cotton thingy on the top of furnace & didn’t see it on any furnaces you showed

Calling all 90 plus furnaces "sealed combustion" is erroneous. When 90 percent furnaces were introduced back in the 80's they were single pipe systems. Sealed combustion or two pipe systems didn't become prevalent until the mid 90's