R22

[mark beiser]

Most of the coils used for R-410a are no different than R-22 coils, they just use a different TXV.

Trane has has some air handlers out now that have a coil designed specifically for R-410a. It is nice because the smaller tubing diamaters allow the coil to take up less space while still maintaining the required surface area, so the new air handlers are about 25% smaller than the old ones.
I don't know if the tubing thickness has changed.

I would assume that other companies have similar things in the works.

[chillbilly]

I have been told by our Carrier guy that I can convert a R-22 FK4DNF model airhandler to Puron by simply changing the TXV.

I'm not suggesting using a R-22 compressor on a 410-A system Doc so there's no need to get defensive, but I would sure like some specifics on the differences.

Guess I'll have to check with compressor and equipment manufacturers to understand what makes them more "robust".

[dash]

Originally posted by docholiday
The internals are different in order to operate at much higher pressure differences, not ot mention internal relief's etc. and the seal around the electrical connections is more robust. Hey, feel free to try an R22 compressor in its place.

While the Carrier coil may be rated the same (many are), then so be it, as I said, the coil wall thickness doesnt change, but I dont think Carrier ever suggested using a coil that was actually used in an exsisting R22 system to be later converted to R410A by merely changing the TXV.

They are "matched "systems",R22 or Puron/410a .

[dash]

We have been installing Puron/410a since 1997 or 98,over 800 systems in 2004 alone,at least a 1200 over the few years before that.

There are no issues,other then which refrigerant will cost more in the next few years.

Like Doc,I don't have a crystal ball,but from what I've read 2013 or 2014 ,will be when the prices will be reversed.

[billva]

if anything, prices of the two will not will not "reverse".

410 will stay the same and 22 will slowly creep up.

that's like saying carrier is going to bring prices on 13 seer models down to 10 prices, once the law takes effect.

don't think so.

[hiltontech]

With what I'm hearing R22 will be around for sometime but the price will rise making some of us to forget about it and move on, when should we begin to stock up on it?

[HVAC Pro]

Originally posted by billva
if anything, prices of the two will not will not "reverse".

410 will stay the same and 22 will slowly creep up.

that's like saying carrier is going to bring prices on 13 seer models down to 10 prices, once the law takes effect.

don't think so.

Good point. I agree with you. Hopefully R410a will at least moderate somewhat for the sake of the end-user. OUR customers.

[edward301]

R22 prices are good and low right now stock up. I do
not think 22 prices will go up anytime soon, at
least not much.

R410 prices are moderately high, and may hold. But
they also may go up, who knows. Heck look at
134a which is a enviromental refigerant. A year
ago price was low. Right now 134a is six times
higher than a year ago, and still increasing.

Plus 134a is hard to get, everyone is on allocations.

So you never know.

[dash]

Originally posted by billva
if anything, prices of the two will not will not "reverse".

410 will stay the same and 22 will slowly creep up.

that's like saying carrier is going to bring prices on 13 seer models down to 10 prices, once the law takes effect.

don't think so.

Close but not that low.