Quote:
Originally Posted by spofford
We did get estimates for a gas 3 ton unit cost was $ 5000- $6,000. included replacing all lines. Not replacing lines from a/c to house, was $ 1,500 less, from smaller contractor, with good reputation. Larger contractors would not just replace unit.
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Coming from an HVAC background I can advise that changing lines is a waste in some cases and very much needed in others. It is particularly important when the new unit really does need it for efficiency. Some of the new units require a larger low pressure side to get those advertised efficiency #'s or you will not get what you pay for in efficiency even though it would function. Similar efficiency level change outs are a waste to change lines and mostly just running the bill up unless the existing lines are deteriorated for some obscure reason but should last for decades. New Freon types can be line flushed if the line size is acceptable. P.S. take the time to do the math on dollars spent vs dollars expected to be saved and there is always a sweet spot, the very latest technology rarely will pay for it's increased cost in the life expectancy. Also as new equipment has evolved the variables such as existing duct size can rob that perfect efficiency that might of been enjoyed by a perfect new install done correctly as well so ask questions. I personally find one step back from front edge on the latest technology is the sweet spot in pricing if your existing infrastructure supports its needs. Spending a couple thousand dollars extra to get an expected savings of $9 a month is bad math for most of us. Sorry to be so wordy but just have done a lot in this area so felt I had more than average to offer.