R-424A and R-434A
R-424A and R-434A
(OP)
Anyone out there have any experience (good or bad) with either of these two claimed drop-in replacements for R-22, or either of the companies?
Comstar RS-44 (ASHRAE R424A)
Comstar RS-45 (ASHRAE R434A)
Comstar’s web site at http://www.comstarproducts.com
Another site for R-434A: http://www.refsols.com/RS-45.html
Comstar RS-44 (ASHRAE R424A)
Comstar RS-45 (ASHRAE R434A)
Comstar’s web site at http://www.comstarproducts.com
Another site for R-434A: http://www.refsols.com/RS-45.html





RE: R-424A and R-434A
RE: R-424A and R-434A
RE: R-424A and R-434A
You could check with the SCE (Southern California Edison) Refrigeration and Thermal Test Center. They tested many of the new refrigerants before they were even given a number by ASHRAE. I was at a meeting last week and no one mentioned this one but I will be there again next week and ask.
Go to http
RE: R-424A and R-434A
R507 is a good one to use if the suction pressure is not too high and you have sufficient cendensing surface.
Ken
Ken
KE5DFR
RE: R-424A and R-434A
Consider the cost of those drop-ins compared to $2.50-$3.00 lb for 22(I can buy 30 lb jugs for $75). Similarly, R12 was phased out a long time ago, but I can still get R 12 jugs for around $150 to $200.
RE: R-424A and R-434A
Ask them what a 25 or 100lb tank costs -- I'm curious.
I think it's funny hearing talk about ozone depleting CFC's & HCFC's when you have hundreds of millions of gallons of Chlorine swimming pools evaporating into the atmoshere.
RE: R-424A and R-434A
I am glad that other people take the environment a little more seriously than you do. Cost of the refrigerant is not the only issue. Like it or not CFC's and HCFC's are depeleting the ozone layer and it has helped to reduce them. I commend MintJulep for researching and following the spirit of the law whether he likes it or not (he doesn't say).
For someone of your qualifications which I have read so much about in your "Any P.E candidates or P.E.'s out there?" thread I would expect you to know more about the chemistry involved. Chlorine by itself is very reactive and completely reacts before rising very far in the atmosphere. In pools it will probably be completely reacted (almost no free chlorine) before evaporating. Chlorine use in pools is a very minor use of chlorine in the world. I find it ironic that the ones who know the least about the ozone depletion issue technically are the first ones to dismiss it.
The HFC's and HCFC's are very stable compounds and do not release their chlorine until the rise very high in the atmosphere where they are struck by high energy UV which breaks the bonds releasing the chlorine which then destroys the ozone.
See the book New Refrigerants for Air Conditioning and Refrigeration Systems by David Wylie and James W. Davenport if you want more information. I recently attended a seminar with the first author and he was very informative. It was free and it sounds as if it might help you.
RE: R-424A and R-434A
RE: R-424A and R-434A
RE: R-424A and R-434A
I take it seriously, but when you're a business owner that deals with Fortune 100 clients, you have a better understanding of dynamics involved -- I can think of 1 company that spews hundreds of tons each year
I disagree with Chlorine not contributing to Ozone depletion. The Chlorine in the pools also form Hydrochloric acids and also quickly reacts with Oxygen to deplete ground level ozone that should migrate to the atmosphere.
RE: R-424A and R-434A
Apparently you are a business owner that deals with Fortune 100 clients. I deal with Fortune 100 clients frequently. I don't know of any who intentionally spew hundreds of tons a year but if you do and you are a party to it, you may want to read the article at this link: http://
I guess that with your credentials you can just assume that you are correct and that the scientific consensus is wrong. I won't go into the details of ground level ozone but if you know much about the chemistry of ozone, again, you would that it is very reactive (that is why it is considered a pollutant at ground level) also and will easily react before it reaches the ozone layer at a height of 15 miles. Read about it a little more at http:/
RE: R-424A and R-434A
For all of the folks pushing R-134a, it has zero ozone depletion potential, but it is reall a bad actor on the global warming issue...so we need t drop it as well?
No, the answer is to control the refrigerant and the leaks.
Ken
Ken
KE5DFR
RE: R-424A and R-434A
RE: R-424A and R-434A