Great info. Bryan. Thank you.

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

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.

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

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.

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

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.

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

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

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

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

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

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!

You are truly a blessing to this industry

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

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

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

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

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.

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.

changing refrigerant has nothing to do with the environment and all about money

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.

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

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.

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

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 😅

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

Great Information! Thank you for the class..

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

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

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.

Extremely well presented, valuable info Bryan.

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.

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

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

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.

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

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

Master Class, Thank you 🙏

I really appreciate these videos

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

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

“What do the kids say today”. Got me 26:47

Not to get political but if you don't like all these tyrannical mandates, vote very carefully in November.

I love hvac techs acting like a flammable refrigerant is the biggest fire hazard when they have inch + diameter gas lines that just push in an unlimited amount of a flammable gas..

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.

Great presentation, thanks

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

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!!!!

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

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.

Thanks for making these videos!

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

Get rid of the capacity system on the compressor. Use a inverted system slow gradually. Startup also it will reduce electricity consumption. They already have it on split heat pump unit. Make it refrigeration simple. The mechanic going to be safe. The homeowner going to be safe

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.

A really strong magnet will prove there's a steel striker plate when covered with sheet rock.

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

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

I'm not sold on the "don't unsweat" requirement. If we've already recovered the refrigerant and opened the system to atmospheric pressure, in my opinion at that point if you're comfortable brazing in new components you should be safe to unsweat existing components. If unsweating is so dangerous then we should all be using ProPress fittings.

10 years ago r410a

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

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

Once again if you have a propane air condition or refrigeration and the unit is each outdoor I will implement a suction and liquid line solenoid together with a propane detector, a high and low pressure control will be required as normal wire into the system

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.

Always awesome I formative videos. Thanks!

Lets go back to r22

Propane air condition chill water system will be an excellent choice. I think personally anything 5 ton and up should be a mini chill water system with propane or glycol cooling instead of water oh maybe Roddy to coolant like from a car to replace the water. This distance should be under 100 ft

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?

great course

FJB and his EPA! They are returning the Southern US back to hard living. Low lifespan equipment and high electric costs are making AC unaffordable.

With the propane refrigerant, I see chill water system will be a very big economic business. Instead of water, it will be coolant to compensate Big Freon charge equipment

From me personally, any client of mine in stolen a 5-ton unit. I will convince them to put put in a chill water system replacing the water with coolant using the system almost like a pool heater, heating and cooling. This will solve a big headache with the flammable refrigerant

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.

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!

Government redistribution of wealth

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

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.

As an example…. Flour in dust form is an explosive….

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

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*

Because of the anti-R12 histeria, most consumer aerosol cans use flammable propellants. Even/especially food products often use flammable propellants. Inhalers are much more expensive and dangerous. But that's OK.

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

Della and Senville are selling R32 mini splits.

Now that the US Supreme Court has overturned the Chevron Doctrine this phase-out is unenforceable. The EPA no longer has authority to ban anything without the explicit approval of Congress through legislation.

Great information. Thanx

Can we still blow out drain lines with it?

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

Thanks a lot for everything

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

So, making a molecule unstable is one path to lower GWP. Anoither path is to make it water soluble.

I am a licensed General Contractor in my state, and I find it stunning how you downplay the complexity of this unnecessary refrigerant change. What you fail to understand is that this will add a huge amount of confusion to the entire HVAC industry, and this confusion will generate significant cost increases to HVAC manufacturers, HVAC contractors and the consumer. I have two engineering degrees, and a civil engineering degree from one of the highest rated universities in the nation. I have taken the time to learn the vocabulary necessary to read and understand climate studies. After reading several of the key climate studies that purport to "prove anthropogenic driven climate change," I have been stunned at the overwhelming amounts of junk science these pro-global-warming "peer reviewed "studies contain. The issue is not if the climate is changing because we can easily prove that the climate has been warming for more than 5000 years after the end of the last ice age. The key question is, is if global warming is caused by man-made emissions of greenhouse gases? To address this question we must first be able to accurately quantify how much greenhouse gas emissions are naturally generated by thousands of sources on earth. We currently are incapable of accurately measuring the aggregate amount of non-man-made global warming gases naturally generated. Without an accurate measurement of this variable, we simply cannot prove that anthropogenic emissions are sufficient in quantity to affect global temperatures to the point we can measure a difference. So, based on hard science metrics, we cannot even prove that man-made greenhouse gas emissions are warming the climate at all. This is especially true because anthropogenic emissions of global warming gases are approximately less than 1% of the total generated naturally by the earth. The point is, we don't have any real scientific proof that these coolant changes will do anything to stop the alleged aggregate warming of the earth. Most scientists agree the earth is warming slightly. But they really don't know how much. And climate scientists cannot prove anthropogenic emissions are fueling global warming. This is important because it is almost certain that these coolant changes will not affect the changes occurring in in climate in any way. They are feel-good delusional requirements put together by Democrat climate change cultists, and there is no hard, verifiable scientific proof to back the Biden Administration's hysteria. So the reality is, all of this added complexity and cost is about as productive as a dog chasing its own tail. It accomplishes nothing to help the planet. But even worse, these increases in HVAC costs hurt the poorest of the poor and the middle class. These red-tape regulatory mandates are a useless waste of scarce resources. So I would suggest that you not act like these are not major changes, because they are. Costs are going to increase by 30% or more, and that DOES hurt every American family!

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.

EPA says R22 is better than A410? So why not go back to R22? EPA is a joke

Pretty cool thanks for sharing

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

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

R12 stuff lasted well too

Does it have a smell like propane

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?