DO NOT LET THEM USE R410A IN OLD COPPER LINES

Wether they are putting in 22 or 410 I would change the lines. You can
abandon the lines in the wall and have the new lines installed external of
the building, and then covered in a downspout.

--
Bob Pietrangelo


www.comfort-solution.biz
On Time or Your Service Call is FREE
Preventive Maintenance Specialist




"TT" wrote in message
.net...
It's still working after 20 years, but I just bought the house last year
and
want to replace entire 2 zone system before it dies. Three reputable
local
outfits have presented quotes (in 10-15K range) for a 3 ton and a 1.5 ton.
Of the three only one explicitly mentioned replacing the 20-year old R22
line sets with new, the other two said nothing about this. Since the
upstairs unit's plumbing runs inside walls the one man proposed an R22
unit
there, but the others want to use the new 410 refrigerant in the old lines
(I assume, since they proposed new newer refrigerant and din't say
anything
about running the lines up the side of the house hiding in downspout
camo).
Does this sound correct? I understand there's a significant pressure
differnece in the two line sets. Units proposed are Trane and American
Standard, replacing a Ruud system.
Thanks in advance for any good thoughts.