"Tony Hwang" wrote in message
news:8JrUj.121063$Cj7.84990@pd7urf2no...
Telstra wrote:

Not a lot of peaple post HERE so they have to make the most
of the one's that do.

Anybody want a 9 Lobe 7 Flute 300 Ton Frick Screw for $10
Come's with 5 Tons of NH3 and a free EVAPORATOR COIL
( NEW ONE ) Very usefull for holding down the roof in a
cyclone ( 3 Ton Weight )

The Interpretation of all the Complex technical terms USED IS
THEY WANT YOU TO BUY A NEW ONE


" wrote in message
news:RT0Uj.2965$5_1.654@trndny05...

My mom's 22 year old 4 Ton 10-seer Carrier A/C condenser is shot. Her
furnace is relatively new.

She wants to replace the old unt with a new Puron Carrier 4 ton
condenser.

One HVAC company is saying that they do not install new evaporator coils
because it is unnecessary, and the efficiency will be around 12 or 13 if
the old coils are used with a 15 seer unit. They say they have never
had a problem with leaving the old evaporator coils in.

Another HVAC company is saying that it is important to install new coils
because the efficency won't be good, and also the unit will be under
more stress with the old coils and will likely only last for 4 years.

Which of the two is correct?

Thanks,

J.


Hi,
Rule of thumb, you always use matched set. Older coil may die soon(spring
a leak) or if you want to reuse it, it needs flushing with
special chemical which is very expensive. (R22 and Puron oil is different)
Most techs does not want to do this. Also Puron runs at
higher pressure. Proper thing to do is to replace line set, coil and use
transfer valve. For more expert advice go to forum at www.hvacmechanic.com
I am not a tech. Just alert consumer.


Using an older coil is for the Hacks, like Stormy.
You don't use a old R22 coil for a new R410 system, PERIOD!!!!!