View Full Version : R411b

24-07-2003, 10:51 PM
Hi guy's

I found a cyclinder of R411b in a cupboard apparently a previous dude bought it to try out as a drop in for R12 or evan a replacement for R134a ,i have never used it before ,is it a replacement for R12 ,r134a and are it's properties similar to R12,
the equipment i us it in would be vending machine fridge's with anything from a 1/4 HP to 1HP compressor's ,cooling the cabinet down to a minumin of +4oC .The cyclinder is full and no one know's if it was succesfully tested or not.

could any of you top notch guy's have any advise weather i should try it or not


Prof Sporlan
25-07-2003, 05:05 AM
The Prof seems to be entertaining a number of refrigerant questions lately... :)

You may be mistaken in your refrigerant designation. R-411B is a blend of R-1270/R-22/R-152a, 3/94/3 pct by weight. Since it is 94 percent R-22, its thermodynamic properties are also similar to R-22, and as such, it is not promoted as an R-12 replacement.

25-07-2003, 12:41 PM
R411B was heavily touted as an "energy efficient" alternative to R22 some years back in the UK.

It was mostly sold by a company called Greencool. I don?t know if they are still going, but their web site is:

The idea was that you took your R22 out and replaced it with R411B and gained an energy reduction As many of these systems were heat pumps it was never clear to me whether it was an overall improvement in both modes at all conditions, or merely selective.

Many manufacturers never supported it because of the warranty implications.
Add to that issue the restrictions now placed on HCFC and its mixtures in the EC, you?ll appreciate why it was stashed away out of sight!

It may have some other more specialised uses that I don?t know of.

Hope it helps
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25-07-2003, 01:44 PM
back of greencool, there is a lots stories, but only interest our chinese hvac guy.
the inventor of 411A, 411B, and 405A is a chinese tech. the dispute arround him and his gas is going more than 15 years. however in my opinion, it's just boast.

25-07-2003, 02:38 PM

Don't know anything about disputes, Lin.

The bottom line is that there are a plethora of alternative refrigerants around in the EC since the demise of HCFCs intended to replace many of the mainstream refrigerants, and very little real knowledge readily obtainable.

Most of us are confused and not a little bemused by the number of '****tails' around.

You only have to look at the pages & pages of refrigerant types listed, for exapmple, in EN 378. And they are the ones in commercial use, plus all the exotics.......

......... this trade used to be fun!

Back to the original topic, over to you, Andrew. If you don't use it you will need to dispose of it safely and legally; waste refrigerant is hazardous waste in the UK.
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25-07-2003, 02:43 PM

My last post seems to be been expurgated!

There was no intention to be rude it should have read c.o.c.k.t.a.i.l, as in a mixed drink!

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Prof Sporlan
25-07-2003, 04:52 PM
Try 'concoctions' next time... :D

27-07-2003, 10:38 PM
thanks guy's ,i had my doubt's about it ,i guess the company will have to pay for it to be disposed of,their loss for buying it in the first place.haveing used R22 for some time we never evan though of useing anything other than R22 .untill all cfc's where declared the scorge of mankind leading to the meltdown of the polar ice cap's and the death of all mankind(he he he ),anyway thanks for the advise guy's.

koel goeroe
09-09-2008, 08:52 PM
Why do they refer R411B as a replacement for R22??
R411B contains 94% R22 in weight.
Will this still be allowed after 2010??

09-09-2008, 09:45 PM
Why do they refer R411B as a replacement for R22??
R411B contains 94% R22 in weight.
Will this still be allowed after 2010??

R411b was marketed in the mid '90s I first heard about it in 1997, at that time i don't remember hearing that R22 would be phased out.

It was advertised as having a better COP than R22, and therefore more efficient, from memory i think it had a higher head pressure tho.