How to Test HVAC Room Pressurization (Zonal Pressure Testing for HVAC Commissioning)

[jakenuckolls]

yes we do like the longer content. great work here breaking it down.

[TreyAkin]

The extra layer of nerding out got me to sub

[ParabellumX]

Darn! Jake Nuckolls beat me to it!
I was going to say the same thing; a lot of us do like the longer content - especially myself.
After all, a lot of us are on here seeking more information or a higher learning in HVACR. Others simply just want more comfort.
I've learned a lot from your channel, and I'm an HVACR-Tech-in-the-making, (still in college right now; about to start commercial HVACR next semester).
I really enjoy learning about the whole Manual J/Heat Load Calculation aspect of HVACR.
I don't know why, but I've always been attracted to the complexity of certain subjects, and your videos are helping to pacify that thirst.
Thanks, Corbett!

[drnickriviera]

Installed an 8 inch jumper from my master to another space because the room would constantly pressure up. Great content.

[judman]

Very nerdy and detailed, Love it! Since most homeowners cannot afford a $500 manometer and other tools like that, it would be cool to compare your calibrated, quality tools to some of the more popular and inexpensive versions you can acquire. Even if they aren't dead on, they might be reliable enough to give homeowners a starting point to work with HVAC contractors.

[whereisthemessiah]

I've been looking for a video like this for a few days. Thanks!

[superspeeder]

More nerdy = more better!

Is there a guide on how to design bypass ducts to reduce noise transmission?

I want to keep bedrooms as quiet as possible, and one of the best ways to seal out noise is to have a tighter fitting door with small undercut. As you point out though, this either requires a return duct or a bypass, but a bypass can allow noise just like a large door undercut.

Tips? Suggestions? I’m thinking offset grilles in a stud cavity with some sort of internal sound insulation that doesn’t block too much airflow.

[winhousewhisperer]

You have this great way of compelling me to spend more money to do better diagnostic work to generate greater value for consumers' money spent. Rock on (and, I signed up already...proof social media works 🙃)!

[hvactechwanttobe]

If I understand this correctly one of the problems high pressure in the room equals to different temperature from the rest of the house
possibly higher energy cost is there a health problem for people?

[KennyFlagg]

This was timely. I was really tempted to make a conditioned attic in my retrofit but it’s just not in the budget. I won’t need to run returns to all upstairs bedrooms if we nail our Man D.

[ams]

Something that confused me when I tried to do my own calculations is you don't appear to actually have a 1" clearance beneath your door: 65.3cfm / 396fpm / 36in = 0.66in. Other than that, fantastic video, I really appreciate the in-depth explanation. This is helping me check my own door undercuts and whether to do jump ducts. The answer, unfortunately, is yes -- I'm calculating ~10Pa with 32" doors and 0.625" clearance at ~150cfm.

[billcunninghame]

Whoa! I kinda followed along - but then I'm a Google nerd, not a HVAC in the weeds nerd. That said, this is a great video for the HVAC nerds. :)

[cobrasound]

As always, a great video (and aptly timed for me as I'm about to DIY duct design for our new house). Would you mind sharing the stair railing system that is shown on your stair case?

[tweake]

and the next question is, how well does carpet seal the door?
also interesting that you have wider doors than us.
we have a few problems with poor man hvac systems not having returns installed, causing depressurization of the main room, causing back drafting of fireplaces.

[fortheloveoftheocean]

I came across this video because we just installed a new AC unit and air handler. Since the install I’ve had a really bad case of tinnitus where I cannot sleep in my bedroom because the pressure in there is horrible. I have humming all night long in ears. I have to sleep in the living room. How does one go about fixing this will help? It’s disrupting my way if life. They replaced ducts also but not thru the house just the k es that lead to ac.

[exclusivelynyc]

Hi. Always learn so much from you. I wanted to ask. I moved into a house that was build in 1962. There's a return vent in the basement. Is that normal and necessary? The main return is on first floor and no returns on the above floor. Also the return in the base, if I look through it about 10 feet across is the main return so wonder would my house perfom a bit better if I closed the basement one. I did a blower door test, horrible number at 15.7 ACH. My goal is to bring that down as much as I can. The second question is, what's a realistic goal for that loose of a house? Thank you.

[chriswilson]

I think I know what tool I will be purchasing in the very near future...

[mpearl]

My home is 5 years old. Every winter we have issues with doors and locks freezing shut. We tried everything from lowering humidity inside the home, we changed locks so many times, getting home inspectors involved to see if hvac or vents are not working properly. As of the moment we are looking into getting storm doors installed to help with the frozen doors and locks issues. One home inspector mentioned about getting the pressure in the home checked, we spent so much money on fixing this issue could you please enlighten me if this is necessary. Thank you so much.

[geraldkurkjian]

Hi, not to change the subject, but have you heard of high frequency waves going up to 22KHz in an appartment building. I catch this on Advanced Spectrum Analyzer from playstore. I read on forums that these waves are not audible to the ear but to the skull neck chest abdomen and legs. Some people might feel mini vibes with resonance and pressure, especially when balcony doors are closed and no other noises are noticeable. Even when the wifi is off. To feel these you need silence. Writing to you from France and haven't had any straight answers yet. Some say it's from relay stations and got to do with volt meters to start with, others say mechanical or much.

[peopleunite]

Looks like you have an "exterior" door separating your studio from the rest of the house. You've said elsewhere that they are separate systems. So how do you test in a situation like that? Unlike a bathroom or bedroom door, there's no gap unless you crack open the door, which obviously, impacts results. I've thought about putting the tube through a window and taping up the rest of the gap. Is there a better way? Also, how do you measure the air leakage between a home and attached garage? Since garages are leaky, I can't think of a set up that would separate leaks from the garage and leaks from outside. Thanks!