Air Flow Hood Considerations w/ Dwyer

HVAC School - For Techs, By Techs

Bryan Orr

Education, Business, Self-improvement, Careers

4.9 • 1K Ratings

🗓️ 23 July 2020

⏱️ 35 minutes

🔗️ Recording | iTunes | RSS

🧾️ Download transcript

Summary

Jaden Lane joins us to discuss some best practices when using an air flow hood. She also explains how the Dwyer Smart is innovating in the hood space.

An air flow hood is an excellent tool, but we can't just assume that it'll work correctly in any system. Various vents and diffusers can cause different flow patterns to reach the hood, so you can get an incorrect reading if the flow hood is not aware of the flow pattern. Unless we give the hood background on what's going on in the duct, there's no way the hood will know the correction factor to give you the correct reading for the conditions in the duct. You can adjust smart flow hoods to compensate for inaccuracy factors.

Hoods are like big canvas skirts that you place over a vent, and there's a flow grid at the bottom. As air moves through the hood, the grid takes airflow readings. There are pitot arrays that act as traverse points on a duct traverse; these arrays take multiple measurements and give you an average. These devices work better when the air is a bit turbulent. If you doubt your measurement, you can also try the hood in different 90-degree orientations (but keep it centered).

Dwyer does a lot more than just make test instruments. They have a rigorous testing process for their products; their products can also work as permanent installations within buildings, not just tools for technicians.

Jaden and Bryan also discuss:

Dwyer products, including the Magnehelic
Vent vs. grille vs. register vs. diffuser
Computational fluid dynamic analysis and other test methods
Calibration vs. zeroing
Predictive balancing
Choke and backpressure
Vane and hot-wire anemometers

Check out Dwyer at dwyer-inst.com.

Learn more about Refrigeration Technologies HERE.

If you have an iPhone, subscribe to the podcast HERE, and if you have an Android phone, subscribe HERE.

Transcript

Click on a timestamp to play from that location

0:00.0	This episode of the HVAC School Podcast is made possible by our great sponsors and I say that all the time but it's really true
0:10.4	Our first sponsors carrier and carrier. We're excited about the new
0:14.0	line of infinity equipment that carrier just came out with that you can actually do the
0:18.4	commissioning using a app on your phone and Bluetooth. I'm going to actually be trying it out tomorrow and I will
0:24.9	let you know how that goes to be putting up some videos on that we're excited
0:27.8	about the new product line very high efficiency also very high EER and great de-humidification, which is always one of the main things I look for in Florida.
0:37.0	Find out more carrier.com.
0:39.0	Also Blue On and Blue on energy.com. Blue on is the company that's focused on helping technicians do retrofits better.
0:47.0	So the training side, product manuals, all that.
0:50.0	Start by downloading the free Blue Onon app just go on your iPhone or on your
0:55.5	Android device download the blue-on app take the short training and learn all there
0:59.8	is to know about retrofitting and about high-glide refrigerants and everything you need to know about retrofitting and about high glide refrigerants and everything you need to know and
1:05.0	then you will be prepared to start to retrofit.
1:07.8	Blue Won is your partner and all of that.
1:09.3	Sure, they make a great refrigerant in TDX20, but they're excited to help technicians do retrofits better
1:16.4	and to provide solutions across the board. So find out more, Blue On Energy.com.
1:22.1	Also, Navac and Navac Global.com.
1:24.0	Navac makes incredible vacuum pumps.
1:26.0	They make vacuum pumps that are actually battery powered.
1:28.0	If you haven't seen their two and four CFM battery powered vacuum pumps all the way up to their really high capacity
1:35.0	12 CFM pumps that are great for commercial and industrial environments. They have
1:38.8	a full line. They also have several different recovery machines.
	...

Please login to see the full transcript.

Previous episode | Next episode

Disclaimer: The podcast and artwork embedded on this page are from Bryan Orr, and are the property of its owner and not affiliated with or endorsed by Tapesearch.

Generated transcripts are the property of Bryan Orr and are distributed freely under the Fair Use doctrine. Transcripts generated by Tapesearch are not guaranteed to be accurate.