"Flammable" Refrigerant Facts for Residential HVAC

[@brianmcdermott2430]

Great info. Bryan. Thank you.

[@tedbell4416]

R-22 "significantly lower pressures" , yeah and equipment that lasted 20-30 years plus

[@youarethecreator1]

100% correct

[@cliffanderson7544]

Been doing hvac 16+ years now. Still have a 23 year old r22 system that runs perfect. I will run it until I no longer can!!!

[@whofixeditanyways]

@@cliffanderson7544 I just serviced one from 1975. Someone cut the blower cap out and it has been running without a cap for I don’t know how long. The condensing unit is from 1995. Still chugging along.

[@marknaravas318]

The house I grew up In had an American standard that went 35 years till it blew a condenser. The Heil replacement only made it 7 years.

[@tristantimmonstt]

Service three 1995 Lennox 5 ton condensers at a shop and all have the original compressors. They don’t make em like they used to..

[@jessemackenzie6516]

Industrial generator tech here/ I have to say I enjoy your teaching style. I do not work in this field but your teaching style makes me want to listen. Be

[@comeasyouare4545]

It's all about the price. Nothing to do with what it actually affects. Glad you brought up propane.

[@mikesimmonds2085]

Hi this is Mike Simmonds. I. Worked with you at delair I like your casts . I'm 65 now and Still learning. You are never to old.

[@s.j.5850]

You really know your stuff Bryan. We appreciate you explaining the significance of the new refrigerants that will become the industry standard.

[@TgWags69]

Propane with something like 10% iso butane was supposed to be a pretty much drop in for R12. However there used to be significant fines for doing it

[@smokeyray5017]

In 1979 at the tender age of 19 I went to Frigerator College. Ended up being a welding and rigging contractor for 30 yrs, but I can tell you all my ACs work perfectly and all of my vehicles are as cool as the other side of the pillow including my 64 Econoline (dual evaps) and my 32 coupe. AC has been good to me.

[@antonioharris-g.a.-hvactec4997]

The two teachers taught well as usual.The class was interesting to learn from.The best class to teach with no mental health distractions with skybox proofreading.#GreatJob!

[@scottritchey7492]

I'm v. To

[@blondestrainger]

Go Chevron Deference ! This is crazy that we keep changing rules when patents run out

[@drewtronics7406]

Good to see someone gets it. The excuses for doing this, are just that, excuses. Gwp, ozone depletion, what a massive scam.

[@my_channel_44]

​@@drewtronics7406The Ozone cycles in and out and has nothing to do with R12.

[@troydspain1099]

Happens with pharmaceutical world as well

[@drewtronics7406]

@@troydspain1099 💯!!!!

[@josephdestaubin7426]

Chevron chevron is going to be overturned in our lifetimes. It's definitely on the chopping block. At least 3 justices are vehemently opposed to Chevron, and a couple more have significant concerns about its 'as applied" constitutionality.

[@timbrown9305]

A friend of mine is a chemical engineer that lived through 40 years of these changes. He said it is NOT for the environment and never was. Twisted data on the effects of these chemicals was done deliberately. He said these changes keep the industry selling new equipment and the chemical companies like the one he was in management for, making new product.... He was very high up in a company you all would recognize. Our government is not what you think it is.

[@GilmerJohn]

BINGO. Back when the Ozone problem was invented, R12 cost $1/lb in retail consumer sales. The stuff was used, as an example, for BB "machine guns" and to chill glassware for mixed drinks and so advertised on TV. Why so cheap? Off patent. Funny thing, the replacements were only manufactured when the maker paid a license fee.

[@footiefan51]

Nope.

[@joez.2794]

@@footiefan51 In the the 30 years I've been running my R22 unit, a typical newer system would've been replaced 3 or 4 times. How could the manufacture and disposal of all those POSSIBLY be better for the environment? "Efficiency?" If the new stuff is so much more efficient, how come 15,000BTU is still the max for a 15A circuit? You could get a 15K BTU window A/C that drew 13A in 1985. You'd think we'd at least be up to 18K BTU by now??

[@Carlossoto-rg5hh]

Damn , I'd like to hear what your friend has to say. That's wild to hear as a young HVAC technician. Thanks for sharing.

[@mikafoxx2717]

Ozone problem wasn't invented. A kind reminder that the CFC's were patented things that drove up the cost compared to the older non-patented refrigerants of the 30's like sulphur dioxide or.. r290. They banned those in favor of CFC's because they were safer - according to DuPont's lawyers. Anything they can patent and do. 1234yf is the new patented expensive stuff​. R290 or R600a at least isn't patented and I think R32 is also out of patent. @@GilmerJohn

[@noneofyour2827]

I always learn a little more each new video, THANK YOU !! I have been doing this crap for 40 years, it's always nice to keep up

[@natepeterson7145]

Im in SC and work on appliances and have R600 in my hot van and never had it explode. I just cut both ends on either side on refrigerators when working on the sealed system (filter drier and low side process stub). Only thing that happened so far is at the compressor after cutting open the system I'll get a flame out. Just like a lighter flame.

[@howardkeil1526]

Well hopefully the chevron case will significantly affect the EPA being able to make declarations about what can and can't be used

[@joshuaricks7730]

55:00 You will eventually will have to have some type of mitigating active system in storage areas with sensor and a means to ventilate.

[@garypoplin4599]

32:03 We used nail plates on wooden studs where NM cable is run in the wall closer than 2 3/4” to the wallboard (I think that’s even in chapter 70 of the NFPA code). We affectionately called them kickplates. But that was years ago, now.

[@timrob0420]

You are truly a blessing to this industry

[@joez.2794]

I'm in IT - watched the whole thing. You're a great presenter.

[@timothyvaughn8482]

I'd love to work for your company the training you provide to your employees is awesome most companies could care less.

[@SuperS05]

10:46 cuba did this at a national level during the r22 phasedown. They had some issues when instructions weren't followed. R290 is starting to make a comeback in some appliances.

[@InsideOfMyOwnMind]

This looked like perfectly done presentaion. It would be facinating to see some of the notes that the people who were there took.

[@Gary-ts6dh]

32:09 - I think it's called a nail plate in the Code; but, it is affectionately known as a "kickplate" in the electrical trade. We use them on wood studs with NM cable running closer than 2 - 3/4" to the rough wall.

[@chucksmoko5348]

The SCOTUS RULING striking down Chevron Deference may affect EPA powers going forward.

[@hallkbrdz]

Let's hope so. Common sense should prevail to keep costs low for consumers, such as removing the leak repair requirements. None of these refrigerants are an issue with the environment, they are all about selling products covered by patents for maximum profit.

[@my_channel_44]

It's cancels them. EPA cannot write rulings that have legal effect.

[@soundspark]

@@hallkbrdz I'm guessing you consider Thomas Midgley Jr to be a hero?

[@jakbo_]

Unfortunately I I think it would be too late to go back . All of the manufacturers all of the supply houses everyone is basically converted over to manufacturing and selling these new refrigerants. Except for the contractors who actually have to deal with this crap . All these extra sensors and Manufacturing lines and all this extra crap that we need is going to raise the cost of a residential system 30% at least. These big shops are going to start charging $50,000 for these freaking systems

[@hallkbrdz]

@@jakbo_ Time to produce our own open source designs. I'm tired of this rat race.

[@stephennichols4815]

I have always cut out components especially driers because when you heat up a drier it will release any moisture in the drier

[@bikerbobcat]

I've spent the last couple of years doing commercial almost exclusively and only heard a little about this changeover, so was very nervous, but this video is very helpful. Thanks so much for great information and presentation, as always.

[@bikerbobcat]

Just an update, I'm taking a certification class for it through my union local and I feel way, way better about all this. I'm not sweating this at all.

[@robertcook7886]

Great presentation…. Very in-depth knowledge of materials and actual repair/installation experience is very obvious and makes the training very understandable and relative….. Bob

[@olsmokey5256]

Did after market automotive A/C yrs back and moved on to other things, so I did have my certificate for refrigerant handling etc,.. in the early 90's when 134a was fairly new to replace r12,there was a gas from a Chinese chemist called GU 2015. it was MORE efficient than 12 and was non cfc gas. Magic stuff. But 134 seemed to be the biggest thing on the market and Dow AND Dupont were cornering that market. We did buy some 2015 and used it for retrofits and customers were really happy with it. It was a straight replacement for 12. I heard of some shops replacing 12 with propane and I thought how crazy is that ?? Flammable refrigerant?? I bought a small window ac unit for my apt, and IT has flammable refrigerant. Crazy

[@ianplute7033]

Highly surprised the insurance companies are not changing the requirement for the piping on the new refrigerant with the widespread installations.

[@AllAroundHnadyMan]

Excellent training presentations; thank you

[@pewpewimbob]

They could add a pump down solenoid on the condenser liquid line. Leak sensor sends signal to air handler board, board sends 24v signal with extra wire to condenser. Solenoid closes and pumps down condenser. Compressor shuts off on low pressure switch. Only added 1 extra part and ran extra wire to condenser which usually there is spare wires already ran with the thermostat wire This will also prevent the whole loss of the refrigerant in the house. Refrigerant will be trapped between the compressor reed valves and the liquid line. Will only loose what is in the evaporator and suction line

[@jessevasquez8323]

Question on the RDS it is located within the equipment it was mentioned that when refrigerant is detected the fan will energize, and the cooling mode will de energize. Do you know if there is a visible or audible alarm just to let the occupants know or the blower will just continue to circulate the leakage through the ductwork.

[@mistermac56]

Extremely well presented, valuable info Bryan.

[@Surfcndr]

How efficient is a commercial duct application or duct design on a residential home in Florida...

[@brenninwatts1249]

The part about not unsweating anything and to cut it out because of residual refrigerant in the lineset. Does this apply for example if I am changing a filter dryer, compressor or evap coil and I have the system recovered and shraders pulled and have nitrogen flowing? I would thing the nitrogen would have pushed any residual refrigerant out including displaced the oxygen to keep anything from igniting.

[@myerschase23]

Great crucial information explained very well. Thanks for your research and sharing this to help with the upcoming changes. This info is limited and we know we have a great deal of trial and error coming with these changes so this helps tremendously. Thank you

[@stevieb031969]

Why does the vacuum pump have to be A2L certified if the system is empty? Just a crazy question for thought.

[@jonathanedelson6733]

A2L systems are currently prohibited on Massachusetts

[@darylfortney8081]

Can’t wait for this transition to complete so I can finally upgrade my r-22 seer 10 unit from circa 2000. Skipped 410a entirely 😅

[@darylfortney8081]

Sounds like a guaranteed and great investment just stocking up on 410 right now. Might sell off some stocks and buy a warehouse of 410 tanks.

[@darylfortney8081]

You forgot to mention no smoking while working on a system

[@mikafoxx2717]

That just makes it easier to find the leak​s. @@darylfortney8081

[@joez.2794]

Why wait? Propane is available now, and is an upgrade in efficiency and performance to boot!

[@darylfortney8081]

@@joez.2794 because they haven’t even really begun to release all their new models yet.

[@Dark_Knight_USA]

Greetings: I miss the days of Servel and sightglass days. Fortunately, some R still around. Thx 4 the share. Bsafe

[@kevinthomas26]

Are the compressors noticeably louder with A2L? I've noticed aprilaire dehumidifiers with A2L the compressors are annoyingly loud

[@deek791]

Anyone that's not afraid of propane, to a reasonable extent, doesn't respect that it can absolutely do major harm. Not respecting that fact can lead to carelessness and a higher probability of a catastrophic event. I'm not saying no one should work with it but we should all give it the respect that it demands because it can 100% result in death and property damage. Everyone should have a certain amount of fear to preserve the respect it requires.

[@acservicetools]

Good job Brian. The regulations is almoust the same in Europe to. Love your videos. Learn a lot from . Ciao

[@brianflanders6543]

You made a comment in the video about leak repair requirements coming in Oct 2024 on systems with 15-50 lbs of refrigerant in them, do you have a link to more info on this subject ?

[@SuperS05]

5:33 in Canada we've had to repair all leaks for a very long time, along with recovery (and the associated logging) I've honestly lost count on the number of refrigerants I've worked with. This phase down won't change much for me.

[@carlmanis879]

Just to replace AC in the future in a customers house with your brand. You may have to carry 3 different gauges. 3 different recovery bottles. 3 different vacuum pumps. 3 different recovery machines. That at least $6000.00 per truck just for AC just to work on any equipment.

[@youarethecreator1]

HONEYWELL EXPLOSIVE ORDNANCE DISPOSAL (EOD) SUIT FOR HVAC TECHNICIANS AND INSTALLERS. $1899.95

[@joez.2794]

*MANDATORY

[@chucksmoko5348]

Explosive vs flammability are not one in the same.

[@jcaleca60]

E O.D. 😂

[@rwcasto]

[@mubaddagammoh4912]

Lol there will be less Juan and Jose working on the side coz will probably explode

[@anthonygonzalez7488]

The instructor says that r-454 b is a , " mildly " flammable refrigerant, although the msds says that r-454 b is an extremely flammable refrigerant and that the gas can be explosive when it's concentrated in an enclosed space.

[@HVACS]

Mildly flammble is the actual ASHRAE designation

[@DanRyan-v5y]

Is that like mostly peaceful?

[@adambarrett3296]

You're not supposed to sweat the filter drier off but it's okay to braze it back on?

[@HVACS]

Yes, you are flowing nitro at that point You could flow nitro while you unsweat but pulling apart under flow is still not a great idea

[@stephennichols4815]

You release any moisture in the drier when you heat it up and technicians start trying to remove it before it's hot enough and it's not good for the tubing

[@drewthompson7457]

My 27 yr old A/C hasn't leaked. That is good for the environment. I looked into getting a heat pump. For me, there are no government grants at this time. I was quoted $7500 for a 3 season heat pump. Likely more when the new and improved flammable refrigerant comes into use. $7500 buys a lot of clean natural gas. I think I'll keep what I have

[@josephaleman2915]

Great Information! Thank you for the class..

[@stevepaxton5673]

i also wondered why they shut down the outdoor unit. i imagine some of the new stuff could be programmed to pump down for mitigation. Your right, the people making the rules don't know anything about hvac.

[@AlbertoTamez-n8b]

What happens if mitigation sensor fails or blower fails will the concentrated leak in the evaporator coil become dangerous. Is there an audible alarm in this situation.

[@brewaz]

Your presentation is very informative and easy to understand thank you for sharing!

[@matth.4932]

Does R22 or 410A produce phosgene gas if exposed to a torch, during a compressor "unsweating" for example? Keep getting mixed opinions out there. Thank you for such informative videos, keep up the great work!

[@stephennichols4815]

That's what I was told it's just like mustard gas used in the military

[@jesseanderson4612]

Is there going to be a rule about sitting the condenser 10feet away from the home?

[@HVACRTECH-83]

Lol no

[@youarethecreator1]

Body Armor and helmets will be required

[@EarlHayward]

Packaged system (no line set), 12 feet away from combustibles, solar powered, can only be installed and serviced by those who are EPA608+A3++A2L certified who are also members of the local union authorized to perform such work, used to chill water (special water subject to a special tax), that can then be piped into an air handler (also only solar powered), which provides you to be compliant with upcoming 2026 cooling regulations …

[@a94cobra]

Good stuff. So...r-32 could go in a 410 system but it wouldnt have all the new safety parts so we shouldn't retrofit?

[@Honestandtruth007]

To Fully Protect the OZONE LAYERS in the atmospheric..... ALL Nations and All industries must Comply with the EPA....... NOT just AC manufacturers/ AC Techs 👍👏

[@BrianMichael-k6d]

Great video. Very informative.

[@fvrrljr]

in my 60's i always took pictures of my work goldsmith / master jeweler 57 yrs experience photovoltaic / solar thermal technician (not NABCEP certified) not necessary for me DIYer in other fields classic cars etc. love doing the work myself, yes i'm a cheap bastard *enjoyed watching this video in it's entirety*

[@youarethecreator1]

Here is some scientific information that should be taught: A2L laboratory testing was not within the stoichiometric combustion range of the A2L Gas. This gas is combustable in concentrations of less than 13% at room temperature and normal atmospheric pressures. See the MSDS: "Flammable gases, Category 1 Gases, which at 20°C (68°F) and a standard pressure of 101.3 kPa (14.7 psi): (a) are ignitable when in a mixture of 13% or less by volume in air; or (b) have a flammable range with air of at least 12 percentage points regardless of the lower flammable limit.

[@Gr8thxAlot]

I'm keeping my R-22 system forever.

[@morganplisken7271]

And in a free country you have every right to keep and use R-22. I do not believe for a second that R-22 deplete the Ozone layer. Ozone can be created and they do not want people talking about that, so we have to wonder why that is. The CHICOM will use R-12 no matter what our EPA orders.

[@LemLures]

Will there be a new flush to purge with nitrogen for existing linesets?

[@kennethbubser9601]

Can we sue epa for all the different refrigerants we breathed in. I got r12 22 410a 134 407c in my lungs every time I disconnect my gauges. My lungs are running on mixed refrigerants. Thanks Epa

[@my_channel_44]

😂 does that affect your freeze point?

[@kennethbubser9601]

My saturate lung temp is 45 degrees

[@stephennichols4815]

What are you breathing when you are soldering and the refrigerant is In the atmosphere and flame burns the refrigerant and creates a gas that is very bad for you to inhale

[@reggiebannister1080]

what about R-1234YF used in vehicles can you tell me about that? and why its so expensive

[@krytunkrytun]

Very informational, Thanks!

[@WadeSanchez-hw4zp]

I really appreciate these videos

[@GMBaz]

Della and Senville are selling R32 mini splits.

[@treefrogs2894]

If I have a residential air condition and it's operating with propane freon, I will put in a suction solenoid a liquid solenoid at the The evaporator together with a propane detector when it detect a leak is shut off. The solenoid is shut down the compressor

[@fiehlsport]

Propane Freon 😂

[@treefrogs2894]

In the early stages before recovery was introduced, I was recovering gas in the Caribbean to save money and reusing back the gas before mainstream become a recovery requirement. I've been doing refrigeration since I was 14 years old with my uncle And that she's the one. I am 54 years old now

[@frankblankenship3026]

Great presentation, thanks

[@danidoom666]

Thanks for making these videos!

[@Ariccio123]

10:43 fun fact because you're rightfully sweating about telling people about the compatibility of r290 with r-22 systems: Automotive engineers long assumed that flammable refrigerants would unacceptably raise the risk of fire in a crash when compared to r-134a. At some point in the past several years (I don't remember exactly when), someone conducted a test of the safety of an r134a system in a crash and found that the lubricant would start a fire on its own when it got sprayed onto the hot exhaust manifold in a crash. I hope nobody is dumb enough to read my comment and think it's safe to put 15lbs of propane in their residential system - it won't matter how much or how little lubricant is in that system

[@jessekolb5931]

Any vaporized oil will ignite. Hence why diesel fuel burn!

[@juanarboleda]

Master Class, Thank you 🙏

[@jeremywallace5961]

We used to put propane in R-12 cars back in the day.

[@treefrogs2894]

My dryers are flare dryers and the reason why it is is it's much easier to uncrack a nut. If you worry about the leaks on the flare, put loctite Why they don't do the same on the compressor except the discharge line

[@MrBlinchikON]

Pretty cool and very informative

[@christywear5272]

.. curious, why do you not "unsweat" or desolder anymore?

[@kevinroberts781]

I use R290 in my 20 year old R22 system. It's not as efficient but it's close enough to not matter.

[@jakbo_]

Does it have a smell like propane

[@keithb2696]

Has anybody noticed a lot of 5 to 10 year old evap coils that are leaking. Especially the aluminum coils. Are they going to start building the equipment better?

[@Damien567777]

higher pressure refrigerant (r410/R32) reducing equipment life and then race to the bottom on price means manufacturers compromising on copper quality.

[@smacleod69]

No, manufacturers are not building equipment better. New coils are micro channel.

[@mikafoxx2717]

​@@smacleod69It's for higher efficiency, they need more cleaning at least.. but they did microchannel back then too.

[@smacleod69]

@@mikafoxx2717 Thats the biggest crock in HVAC history. They are not making micro channel for efficiency. Micro channels use less metal to make For the so called carbon foot print crap.

[@beachboardfan9544]

What is the best performing refrigerant regardless of safety/enviro?

[@dregenius]

It does seem like the most demanding industrial refrigeration settings tend to use flammable/hydrocarbon refrigerants... i think Dupont played up the dangers to get generations of Americans terrified of it so they could sell their proprietary, worse-performing HFC/FC refrigerants.

[@anthonylosego]

It's also good to cut out a filter dryer so you don't push captured moister back into the system. But also good for A2L. So win win.

[@TerryFrenchy]

Always awesome I formative videos. Thanks!

[@bpark10001]

"Pull the cores, draw the vacuum", you have now tested the system MINUS the cores. What part is the most likely to leak? THE CORES!

[@blondestrainger]

Burned out terminal on the compressor that loses its complete charge with a shower of sparks … Boom

[@adamjankowski4315]

Lol maybe 50 yrs ago. Not today

[@dbz5808]

Nothing beats a Blue Rhino "R290" top off of a R22 system. True drop in right there 🤣

[@jakbo_]

It's not like any sensors that have been done in the past fail sometimes or anything

[@waynebrougham-cook8967]

So what happens to the gas that is recoverd

[@antoniogoober]

Tec bell. I agree R-22 was fine but they feel they need to change things that don’t need fixing.it’s like the old saying if it’s not broken don’t fix it!!!!

[@mikemorassi210]

So what's the difference between ODP vs GWP? and which is the more determining factor these days?

[@mikafoxx2717]

Ozone depletion happens for the next couple decades due to the chlorine, global warming potential is how many times worse than CO2 it is for warming the atmosphere, but doesn't destroy the ozone layer which protects us from skin cancer etc. r410a is something like 2,200x worse than CO2 when it gets into the atmosphere but no Ozone depletion like R12 (worst) or R22.

[@treefrogs2894]

We can solve that problem with the lines in the wall to prevent that problem. Just like how they use electrical pipes, double shielded or even you could probably use green Field protection but you want to keep the gas flowing if there's a leak from one end of the tube out the other end of the tube on the double venting a line within a line like a channel. We can move the gas outside the building

[@timthomas353]

Can we still blow out drain lines with it?

[@jakbo_]

The thing I'm worried about is that most the contractors in our trade are not doing things properly now. And now we're going to put flammable refrigerants inside people's homes that requires a lot of extra preparation in precautions when most guys in our trade don't even read the freaking manual on the equipment they installed

[@Clapsonchoochoo]

R12 stuff lasted well too

[@NormReitzel]

The basic problem you speak of is that bureaucrats think in terms of Labels. it is either "flammable" or it is not. Nevermind that the woirld doesn't work that way.

[@jk-mm5to]

Would it be too much to ask for you to issue notifications for upcoming videos?

[@J3RK]

What is HVAC School using to create those animations?

[@josepheccles9341]

Let me tell you something, R22 has no more ODP than the counter top behind you in this video. After the half day class, I looked through their science, it was flawed. Clorine gas had a specific gravity of 7. Also, the molocule was stable to begin with. The molocule requires significant amount of energy applied to it to break it down and yeild clorine gas. But if you did reliece the cloring, it is 7 times the weight of atmosphere. It will go deeper in the ground than the freon it would have been relieced from.

[@rolandcouillard4160]

R-12, R-22 were developed to replace the dangerous LPG refrigerants. Follow the money.

[@poolmotorrepairguyFL]

lp good 2 know .. i ? r12 was good stuff ?

[@poolmotorrepairguyFL]

a good torch is most important. ill show how ...free