wow I wished I worked for a company that trains like this.

Great teaching with understandable explanations. Thanks!

Really like the whole classroom format and longer length from these last few videos super informative my man thank you.

These meetings you have been posting are some of my favorites you’ve started doing. Thank you and keep it up mr voice of the industry lol. Can’t wait for the next one.

Great class Brian 👏 👌 👍 🙌 I feel part of your team when I am setting in front of my computer taking this class to become a better tech. 🙂

Excellent class. Clearly explained and easy to understand step by step information and method for the installation of Flex Ductwork (even with the industry terms used).

Thanks for the info. Nice to be able to have access to such lessons. Had never heard of using alcohol to clean fittings. not sure if co-workers would be impressed or laugh if I tried it

You are best teacher! My english bad, but i am learning for understanding every your lesson!

These meetings are great. Thank you Bryan

Good lesson for me as a soon to be home owner\builder. Now I will watch my HVAC guys,

I’ve started to use these for our work meetings. Thank you for sharing

Great class Bryan. Thank you.

Awesome and helpful video Bryan, I like the classroom meeting video.

That's my nick name at work! Pooky. Love the Pooky reference on here.😁

Very good explanation and knowledge. Thank you for sharing

Make sure when you pull the inner liner over the start collar to pass over the lock ring very important , your panduit should be tightened pass the lock ring of the collar or boot also We use air seal or mastic on the inside of the inner liner and panduit and fx tape and panduit in the outer liner r8 duct our our targets are to pass below 5% we have no problem here in California Central Valley good video thanks

I dislike doing duct work so much but I have to accept the fact that in az I have to deal with it being that high static pressure is such a issue in az because of the hack installs that started in the late 80s with new construction which I was apart of for 6 months in the early 90s thanks for sharing the right way to install 👍

Thanks. Always great learning.

I'd hate doing hvac in Florida with all this talk of ductboard and flex 😤

Would you have more duct layout and installation videos please

Been straping my flex every 2' always get compliments from inspectors.

I was taught to use a screws to attach the inner duct too a collar a strap then mask.

Good information ,as usual.

AWESOME EDUCATIONAL VIDEO ‼️‼️

In Indiana we tape inner liner, squeegee with hands, panduit strap on outside, we also mastic inside boots and boots to the boot rails.

I learned alot. Thank you

Great job and video

When I started installing back in 06 the company that I was working for told us that pookie inside the flex to make the connection was code. Later on I learned it was just one of there things they wanted done.

Great video. Dream employer.

Mastic on inner liner, slide over collar, put a panduit on, slide over insulation with panduit. Grant is correct. Did it for ten years in az.

When we make any connection between flex and hard duct we use a zip tie and screws through the zip tie into the duct.

I was taught the term “pookie” came from black pipe thread sealing plumbers I worked with called “pipe dope”. So instead of calling it “dope” in front of a customer they say “pookie” - another code name for narcotics in the 70’s and 80’s. It made sense to me lol

13:00 thats how we do it in texas mastic around edges of collar then mastic on flex, then slide over the collar.

Just curious, what is it like doing hvac in Florida? I’m considering moving there from WA State and would like to know what people think about working in the summers in the humidity. Thanks!

Thanks

Good training

I learned a lot from this

Just look at that beautiful Milwaukee in the background

I have flex duct now but am going to switch to hard duct can I use the flex duct for my insulation of the hard by sliding in inside the flex thanks

In SC if I can do metal, should I even be considering ductboard?

I do new construction lmao we just throw a zip tie on the inside liner then pull the insulation down and ziptie that we also mastic the boots but we don’t actually mastic the flex seems weird/messy to me but to each his own

Air will ALWAYS take the path of least resistance. If at times length +route=larger diameter pipe to keep down static and thus keep up velocity to distribute airflow properly. Duct board to start is at minimal .05 supply to ensure proper airflow. Whereas metal you can start at .08 for supply. Metal is always the best choice. Ductwork was intended as a commercial EXTERNAL insulator. It should NEVER be used as soley as duct. Whom seals the corners? Whom seals each collar put in so that fiberglass is NOT in airstream for the life. One last very important factor.. Duct board ALWAYS molds!

your videos on KZfaq are very good, where is the HVAC school located? Blessings.

I figured out the leaky issues back in the’70s cheep caulk now I saw spray foam the whole thing

Snaplock pipe.. Round adjustable elbow.. 🤓

In Australia, bucketloads of black duct tape will hold anything.

I want to see one of these snap lock 90’s 😂

So... what do you do about dampers?... or do you just not use them?

I have high static pressure on a new 3.5 ton heat pump. I know for sure the flex duct is the issue. I have two 12" coming out of the supply in opposite directions. I know I need an 18" for a 3.5 ton heat pump. I did a diagram layout of the duct in the attic. What would happen if I just replace the two 12" to 18"? Ignoring the downstairs, because everything is between the walls. The problem was even worse with an undersized return. The original and only return was a 24x18. The total static pressure on the unit was .9 W.C. I was able to drop the TESP to .66 by making the return 30x24. Since there is so much static pressure and the unit TESP is a .2 and I need an 18" for a 3.5 ton for 1400 CFM. How big does the supply plenum should be and what shape? Should the supply plenum split to 3 18" going out to each of the 3 distribution boxes? Do the other three distribution boxes also need to be larger? Looking at the triangle shaped supply plenum I have very little room up for a rectangle plenum. I think a 3 feet ductboard supply plenum should work. There is a foot from the Air handler to the ceiling and I think 2 feet from the attic floor to the roof. Now I am looking at two types of designs. Design #1 keeps the 18" ducts straight by having a single 18" coming out of the supply and then a distribution box splitting it to three 18". The sides would be coming out straight to the to side boxes and one going to the third box with a slight curve. Design #2 splits to three right at the supply plenum and goes to each box individually, but all three will have a slight curve. I will not be using any metal plenums..... it will be all flex duct and ductboard boxes, because of budget. I am not trying to make a perfect system, but trying to remove the restriction from the 12" undersized ducts installed and replacing the flex duct that was patched with mastic with new ones. Another question about the installation..... I have the flex duct running up and strapped to the roof for support. Since the supply plenum is low to the floor due to the roof..... Can the flex duct be run on the attic floor? Can you tell me which layout makes more sense and less restrictive? Thank you. Layouts: Current i.ibb.co/Ld9kmPM/Flex-Duct-Layout-and-Size.jpg Option #1 i.ibb.co/GHyS00g/2022-07-05-0002.jpg Option #2 i.ibb.co/PNN8mSB/2022-07-05-0001.jpg Air Handler Specs ibb.co/17VvF4B Video of attic kzfaq.info/get/bejne/n6-efLFpntecd4k.html

Snap lock/ adjustable 90s dont leak nearly as much when properly sealed

When attempting to make improvements on an existing system... Would You Rather: Have a 1” filter in the factory position next to the evap coil? Or Have a 4” filter in the return grill 10’ from from the air handler. All else being equal...should I be more worried about the poor airflow of the 1” or the negitave pressure exerted on a length of flex duct? Thanks, learning so much.

8:10. I’m Florida as well. Where in code does it mention this?

Y'all need a room mic.

I'm glad my inspectors don't care about mastic on the outside layer

In some counties in my state they don't allow pookie or duct seal on the duct work. I heard this about 3 years ago. I would have to find out if it still holds true though.

Aeroseal!

Issue with using mastic on inside is mold growth.

Putting mastic on the OUTSIDE of the inner liner...noooo! It won't seal the duct to the collar!

We call it pookie in Colorado lol

I’m not a fan of flex duct. Should be used for terminations only. Rodents chew right thru it. With all the prep, sealant, bands, mastic, tape, etc, needed to make sure the flex doesn’t fall off or leak, I would rather just run steel duct. The cellophane inner liner, with spring, disintegrates, and doesn’t have a very long lifespan. I guess that’s OK in Florida, if the houses only last 15 years.

Those city inspectors have a poor outlook when it comes to the outer insulation of flex having to have a mastic application. That would be about the same as putting mastic around a radiator hose and clamp on a pickup truck. What is the point when its already sealed up with the inner duct ? The outer duct has zero pressure, all it is doing it providing a dead air space for insulation purposes. Plus, if there is nothing to support the mastic layer, insulation moves of course and is not rigid, over cycle times etc. my guess is the mastic is going to age, get hard and eventually crack and just one crack clear through is all it takes to make that idea a waste. I agree, good cleaned surface preparation is king and then the foil tape done nice and neatly, evenly so that all of the tape meets the contact surfaces evenly/smoothly will provide a longer lasting connection than only mastic. I like the idea of a mastic application to the inner connection and the metal fitting. That works because the metal fitting is rigid and will support the mastic for a long time regardless of how old it gets. Wider duct straps are better too as 1.5" seems too narrow. Most systems I'd think will need supply dampers at the supply plenum to get the correct tune for most installs, even if just one or two of them do any good out of all of them it worth the effort and cost.

When you have a 2 story space with a single evap and no VFD on the fan you zone with a dump (bypass). With this config there is a single dump vent somewhere. In this case it's downstairs. Would there be any reason you couldn't add zone dampers to that run that would dump downstairs in Winter and upstairs in Summer to make better use of the conditioned air?

I wished he would have had visual aids for this. I know I'm just a lay person but I'm trying to understand my system that's in the basement.

Flex works great but use hard 90s.

Turbulence being static pressure

Good talk, might work better with more visuals.

Flex is used only to connect duct to a plenum or duct to a small fan. Never use flex as a substitute for duct.

Great information.never been to Florida and guess things are different there.the only people where I live,southern Virginia,that use duct board are the not so desirable company.we use metal all hand made for the jobs.everything you said is true but it all starts with a great duct design.

Move the system???? I don't know about that!!

I prefer to clean my fittings with Tito’s myself. 😉

how about flex duct to metal wyes...

It drives me CRAZY when theses kids call mastic. PUKEEE!!! Also

Is it worth running R-8 ducts in a uninsulated attic ? I’m not in HVAC business just a home owner in the south

Do your best pookie the rest hahaha sorry i had to say it for the west coast

This is the weekly meeting that my company does not have. I'm gonna see I can get my boss to start showing these videos once a week. Maybe we'll actually have meetings then.

Hog hair? Does he mean filter Media?

we call it pookie oohhh goodness.

POOKIE

Why is the woman on her phone during this?

First

Why is she there

wheres the demo.... a lot of talkin for zero demo

I DISAGREE ON THE CONNECTION PROCESS HE DESCRIBED VOCATIONAL TRAINED journeyman 3o years insanity way to much If you put a hanger on flex every four feet and tape flex your fired asap

I hope that girl on her phone in the front row doesn't work on my HVAC system.

termites ? how come we are buying homes or you CAN buy homes that are over 15 years old ,,,,! or spraying our homes properly for termites ? and who can afford a home every 15 years hell avarage young person now cant even afford an old one even ,,,,,that is a stupid idea thats going to cost billions .

I do not believe turbulence in a ducked system really makes that much of a difference. I believe this is a lot over kill

Lol who’s cleaning fittings with alcohol? It’s flex duct for heavens sake. They will do all that and than use duct board, which is the real problem for leakage. Duct board is a terrible product.

Round snaplock duct is way more efficient for long runs, but it requires more labor to install, thats why it isn't used in house installs. But home owners are only interested in cool air coming out of the registers, so it is easier to run a mile of flex and get away with it.