Originally Posted By: AdRock
Originally Posted By: hoosierrun
Originally Posted By: jetmech1
Originally Posted By: Shannow
jetmech1, great post, I concur with your assessment.
Thanks. I said I wasn't going to post beyond this, but I'm going to have to break my own rule. Why is important.
I just looked up the MSDS of R-1234yf and R-152a. If I'm reading this right, the German's got this right. It's been a while since I've had HAZMAT training while working for the freight airline, but if I'm reading this right R-1234yf is much more flammable than R-152a. R-1234yf is a Class 1 and R-152a is Class 2. Please correct me if I'm wrong on this assessment, but HFO-1234yf is way more dangerous.
Here's the links: I just checked them in preview. The first one take a moment or two to load.
R-1234yf MSDS
R-152a MSDS
Universal Global Harmonized MSDS Classifications Page 10 and 11 of this PDF are the important ones.
I'm going to follow this thread.
Thanks,
Mark
When R134a was $1.99 on sale at Walmart several years ago, I loaded up. I recently ran out and see that it is up to $11-$15 a can depending on where you buy it.
I now use R152a via duster cans and a side tap. I can usually get these for about $5 a can. It's a straight drop in and completely compatable with PAG oil. Cooling is identical to R134a. I'm not concerned that it is slightly flammable. It is the oil in mist form that creates the bigest danger anyhow. Of all my years of searching the web, I have yet to come across a serious fire by anyone who has used a flammable HC refrigerant which is supposedly much more dangerous than R152a.
If you have a Sam's club membership you can get a 30lb bottle of R134A for $80, roughly $2.67 a lb. Or you can get a case of 12 12oz cans for $48. Still much cheaper than any parts store.
Prices of R134a really dropped the past few weeks (nearing end of AC repair season?). Cases shipped from E-Bay are now running about $50-$52 and that includes shipping and tax. I still see it for $12-$15 a can at AutoZone and other stores. If you really intend on using a lot, the 30# bottles are the way to go. I would never live long enough to use that much.