Comments on: Friction Rate Is the Wrong Name https://www.energyvanguard.com/blog/friction-rate-wrong-name/ Building science knowledge, HVAC design, & fun Sat, 26 Sep 2020 16:53:01 +0000 hourly 1 https://wordpress.org/?v=6.6.2 By: Steven Bitschy https://www.energyvanguard.com/blog/friction-rate-wrong-name/#comment-13510 Sat, 26 Sep 2020 16:53:01 +0000 http://energyvanguard.flywheelsites.com/?blog_post=friction-rate-is-the-wrong-name#comment-13510 Thank you for your articles.
Thank you for your articles. They have been an incredible resource. One thing I can’t wrap my head around is why we need/want a minimum friction rate of 0.06iwc and a maximum of 0.18iwc – the ACCA wedge, so to speak. I don’t understand what happens below 0.06 that causes a problem… Supposedly air stops flowing? Where did this range come from?

]]> By: Barry https://www.energyvanguard.com/blog/friction-rate-wrong-name/#comment-12035 Sun, 27 Jan 2019 05:08:35 +0000 http://energyvanguard.flywheelsites.com/?blog_post=friction-rate-is-the-wrong-name#comment-12035 Dr Bailes,
Dr Bailes,
I wanted to let you know , I heard you on a podcast with Bryan Orr of hvacschool, which led me to your website. You shared a lot of good information which is much appreciated.

]]> By: abailes https://www.energyvanguard.com/blog/friction-rate-wrong-name/#comment-11798 Sun, 14 Oct 2018 12:58:14 +0000 http://energyvanguard.flywheelsites.com/?blog_post=friction-rate-is-the-wrong-name#comment-11798 In reply to Mark Johnson.

You’re welcome, Mark.  Tell

You’re welcome, Mark.  Tell the 18 year old going to HVAC school that if he learns as much as he can about proper air flow in ducts, he’ll know more than the vast majority of his colleagues in the industry.

]]> By: abailes https://www.energyvanguard.com/blog/friction-rate-wrong-name/#comment-11797 Sun, 14 Oct 2018 12:55:58 +0000 http://energyvanguard.flywheelsites.com/?blog_post=friction-rate-is-the-wrong-name#comment-11797 In reply to Edgar.

Edgar, the 424′ is an example

Edgar, the 424′ is an example of the total effective length from a design job we did in the past.  If you read the article on total effective length, you’ll see that it’s not a special number.  It’s different for every design and is calculated based on the layout of the duct system and the fittings used.

]]> By: Edgar https://www.energyvanguard.com/blog/friction-rate-wrong-name/#comment-11795 Sat, 13 Oct 2018 01:57:30 +0000 http://energyvanguard.flywheelsites.com/?blog_post=friction-rate-is-the-wrong-name#comment-11795 Where 424 come from ?its the
Where 424 come from ?its the length of duct?

]]> By: Mark Johnson https://www.energyvanguard.com/blog/friction-rate-wrong-name/#comment-11794 Fri, 12 Oct 2018 19:00:36 +0000 http://energyvanguard.flywheelsites.com/?blog_post=friction-rate-is-the-wrong-name#comment-11794 I want to thank you for this
I want to thank you for this series and especially another way to think about “friction rate”. Seeing it described in terms of available static pressure is far more intuitive.

Think I will go back and print out your series on paper for more permanent reference. Met an 18 year old kid who intends to go to HVAC college, he could use this.

]]> By: Kevin M https://www.energyvanguard.com/blog/friction-rate-wrong-name/#comment-11793 Fri, 12 Oct 2018 17:28:55 +0000 http://energyvanguard.flywheelsites.com/?blog_post=friction-rate-is-the-wrong-name#comment-11793 In reply to dixie wong.

Replace with clean rigid duct
Replace with clean rigid duct.

]]> By: dixie wong https://www.energyvanguard.com/blog/friction-rate-wrong-name/#comment-11792 Fri, 12 Oct 2018 15:04:47 +0000 http://energyvanguard.flywheelsites.com/?blog_post=friction-rate-is-the-wrong-name#comment-11792 How do you clean flex duct?
How do you clean flex duct?

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