Combustion Air Myths W/ David Richardson

David Richardson from NCI talks Combustion Air Myths and more.

Read all the tech tips, take the quizzes

[dmvhvactech]

Saving this for later, I've been to one NCI airflow class and it was a great learning experience. My manometer became my most used tool in my bag after that. Thank you for sharing this video.

[kennethdean]

Thank you David. Your classes, and the support and encouragement from Rudy, Jim, and Rob are a constant source of encouragement and inspiration. I am honored to know all of you.

[Elisummit]

This was one of the best classes I've seen from the symposium. Thank you Bryan

[lovehvac]

David always does a great job presenting
Thos topic is so important and
overlooked. I'm so glad to see his available. I will be referencing this

[davidallen]

So much great information. Thank you so much for sharing.

[Oldthesis]

"Mother Nature loves balance. She will rot a building and kill a family to get it." Great line, I'll be stealing that for my presentations!

[sportsman]

Wow loved every minute thank you Bryan you really are a big help to this industry and have been mine in the start of my career! Also one thing I would love addressed is no one ever really goes over the best ways to combustion test a package unit since there’s not really a flue like a split system that you can get 18-24 inches away to test! I would appreciate some type of video about package units thank you!

[elijahgoodman]

At 1:35 the instructor says if your water heater has rising CO and falling O2 when you cut the blower on for your furnace, you have return leakage somewhere. Does anyone know why?

[jkbrown]

The high/low air intakes reminded me of the root cellar and barn ventilation designs in 'A Textbook of the Physics of Agriculture', F.H. King, 1907. The design in barns was to remove gases from the animals. Those barn flues used the very tall cupolas or very tall above roof flue piping. Seems at some point some one cut down the height probably for aesthetics.

[Oldthesis]

@HVAC School, David mentioned at the end that the slide decks should be available. Where could we find those?

[jamesdirenzo]

How do you keep a system running long enough to do all of this testing? Especially in the warmer time of the year.

[thecurious]

I spent almost 2 hours to see how to do things right, but for 90 minutes lecturers tried to show that he is the smartest guy in the class (by the way it is not the temperature that moves the air, it is pressure difference due to difference in air density) and just passed quickly the right things that everybody already was doing.

[meeshlove]

I wish he would’ve had a diagram of the back to back elbows. Thanks for the lesson though!

[acrepairnearme]

I've started to lose my mind on 35 ppm. Glad the owner took a dog for a wall just right after a shower . And I've met him right before he was entering the space. Water heater burn thru and fill the air with the carbon monoxide.

[theprofessorfate]

Here's the condensed version:

Combustion requires oxygen(air).
Heat rises.
Pressure differentials will always seek equilibrium.
Never let the opportunity to fear monger about combustion air go to waste.
Everything everyone has done over the last 100 years regarding combustion air was dangerous and incorrect, even if statistics prove otherwise.