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Posted by Deke on April 30, 2007, 7:56 am
wrote:
>My central AC is 20 years old. It still works, but, given the age, I'm
>concerned that the need for a new system may not be that far into the
>future. When it comes time install a new condenser, I probably would want
>to install a new furnace too, since it is
>also 20 years old.....good idea, right?
>
>KEY QUESTION: I was told that when a new AC system is installed, they like
>to install new refrigerant lines although the customer sometimes will opt to
>not have that done. Is it really important to install new refrigerant
>lines?
>
>Reason I ask: my basement ceiling is finished with drywall. Replacing
>existing lines would involve ripping up the ceiling. However, one option
>that that would NOT involve ripping up ceiling drywall, would be install NEW
>lines by running them out a straighter path in which the lines would only be
>visible inside the house within a closet, except that, once outside the
>lines are outside they would be running undereath the deck and then run
>along the side of back of the townhouse for maybe 4 or 5 feet or so to get
>to the condenser location. Since my townhouse is a condo, I don't know if
>they would allow having the refrigerant lines be run from a different
>location in which the lines would be more visible than before. (The
>existing lines exit the house right behind where the condenser sits.)
>Also, the association may be installing a new deck within 10 years, and if
>new refrigerant lines were running underneath the deck then this could be
>problematic when they replace the deck. Do you think my concerns about
>running new lines from a different location aren't valid?
The new large lines are all 7/8 " minimum. Your old one is 3/4".
If you use the old line, it may work ok, but it voids the warranty.
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