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More Heating BTUs Please

More Heating BTUs Please

Over here in Air Flow’s engineering department, we get to selections VAV boxes for engineers and contractors.  Thanks for sending them our way.  Of course, once the selections get to lower heating water temperatures, it takes longer.  The terminal boxes can’t meet all...
Price Industries VAV Box Leakage Nerd Becomes VAV Hydronic Nerd

Price Industries VAV Box Leakage Nerd Becomes VAV Hydronic Nerd

Back in February 2024, Mark Mahon from Price introduced Price’s new terminal box casing offering, which features very exciting low leakage properties. Go ahead, scoff at me.  I think leakage is a big deal. Mark is back with more tales of nerdery. Last time, we covered...
VAV Boxes No Longer All the Same

VAV Boxes No Longer All the Same

VAV Box Manufacturers of VAV Boxes Before Class Manufacturers of VAV Boxes AFTER Class See you in class! You are invited to "Next Generation Terminal Box Offering"This is a remote-only attendance class. When: December 3, 2024 10:00 AM CTTopic: Next Generation Terminal...
Do the Diffusers Need to be Mounted Low? Nah.

Do the Diffusers Need to be Mounted Low? Nah.

When you pick a ceiling or sidewall diffuser, the throw in heating and cooling mode changes due to buoyancy. You have to pull out the book, look at the flow, and look at the throw, to get the right neck size. Get that wrong, a draft is created, as is a call back for...
Find Out How the DV Story Ends

Find Out How the DV Story Ends

If you’ve been reading this blog for a while, you know that DV has been trumpeted by me for 15 years. Still, many of you are not believers. Oh, I do love a challenge.  Yes, I’m talking to you, Mr. ‘I haven’t had anyone ask for it’.  and Ms. ‘I haven’t run into the...
Top 10 Uses for Price’s Engineering Handbook, Version 2

Top 10 Uses for Price’s Engineering Handbook, Version 2

​Back in 2011, when Edition 1 came out, Price gave me a collapsible dolly to help deliver them. You know, those Canadians have universal healthcare, so they didn’t concern themselves much about the handful of trips I made to the chiropractor after physically...
I’m gonna have a bag full of ‘told you so’

I’m gonna have a bag full of ‘told you so’

I’m not generally a person who uses ‘told you so.’      If you miss this class, something comes up that got covered, and it bites you in the butt, it will be tempting to reach into that bag.  Alternatively, attend the class (remote is fine for this one) and you can...
How to Lie with Silencers

How to Lie with Silencers

Air Flow’s upcoming class Industry Testing Standards of HVAC Equipment (AMCA, AHRI, AMCA Sound) is going to spend some time on silencers. Why? The numbers insertion loss and pressure drop data is important. But more important is how the numbers were arrived upon. ...
What’s the correct terminal for return?

What’s the correct terminal for return?

That’s a dandy of a question. It depends on the problem you are trying to solve. LINT:  Price can accommodate a standard VAV box with an orifice ring instead of a cross flow sensor.  Take the static pressure on both sides of the ring, know the opening size of the...
No Role Models, No Problem.  Meet Price Industries.

No Role Models, No Problem. Meet Price Industries.

Just a few weeks ago, I posted that it had been 25 years since I became the ‘new’ owner of Air Flow Inc. If you’ve followed any of our social posts and videos, you know that founder Al Gelin passed away in a plane crash in 1995, and founder Neil Drees from cancer in...