"Gary R. Lloyd" wrote

As I understand it, all of the major companies were in the planning
stages of switching to R407c until Carrier started it's mass
advertising of R410a, thereby creating a market demand for it.

No offense, but that is pure bullsh*t. Show me some facts to back up that
statement.

IMO, R410A is far more dangerous to work with than R407C.

Far more dangerous? It's not any more dangerous than R-22. There are the
naysayers that keep saying that "it's under twice the pressure so it's a
time bomb waiting to go off". That's a crock, too. True, that the pressures
ARE almost twice as high, but there have been no problems with exploding
units or lines springing leaks "that shot right in a worker's eye and froze
his brain!!!". Been installing and servicing 410 units for almost 12 years
now and haven't had any problems (except having to buy new manifolds and
recovery machine. If anything, a statement about the two should read: "R407
is LESS efficient that R410"


As to R22 systems, there already are, and there always will be,
suitable substitute refrigerants.

Where ARE those substitue refrigerants? What brand unit can I go pick up
(and install in a customer's house) that isn't R-22 or R-410???

Gary, you are going to have to face the fact that 410 is here to stay. Even
American Standard (Trane) has said that after this year, they will stop
manufacturing R-22 units and make only 410. I agree that there is nothing
wrong with R-22 and they should keep using the stuff, but it isn't going to
happen.