In a message dated 9/18/2004 8:32:24 PM Eastern Standard Time, atlas@xxxxxxxxxxxxx writes: Paul Stone > R-404a? R-404a is a blend of R-125, R-143a and R-134a. Note the arithmetics: R 125 + R 143 ---------- R 268 And R 268 + R 134 ------------ R 402 --- Colloquially, it is referred to as R 40_4_, though. Cheers, JL ------------------------------------------------------------------ To change your Lit-Ideas settings (subscribe/unsub, vacation on/off, digest on/off), visit www.andreas.com/faq-lit-ideas.html