"Correction -- according to the most definitive study I know of the median life is 20.5 years. 63% of the units were still operational when replaced. ASHRAE Study (Lovvorn N.C., Hiller C.C,2002, Heat Pump Life Revisited, ASHRAE Transactions, 108)"
"Well well. I am not Michael Blasnik, but I do know that when statistical analysis results do not correspond to the physical world, then it is time to relook at the analysis.
It would be crazy to say all the energy saved in California was due to…"
"Yikes -- Folks help me out. I am confused. As I recall, the target superheat for a fixed metering device (orifice/non-TXV) is dependent on the return plenum wet bulb (at the plenum, not in the house because what the air conditioner sees is what is…"
"Hopefully Bob was saying the refrigerant was recovered not: "all gone" into the atmosphere.
If you have a R22 unit any replacements will have to be R22 equipment. If you are replacing everything you will be putting in R-410A and the…"
"Aaren Assuming you are talking about a new condensing unit for an AC there are a few of good answers.
1) Yes if the old indoor coil is from a low efficiency unit and was designed for the same size unit as the new outdoor unit. That is the…"
"We found with the ducts on the floor of the attic, with smaller ACs, with shorter runs, with the ducts buried in lots of insulation, in hot dry climates, that there is almost no penalty for having the ducts in the attic and it is a lot easier…"
"Thank you for the nice post. Remember that the important thing is the actual superheat that exists entering the compressor is what we really want to control. Superheat serves only one positive purpose -- protecting the compressor from…"
"Tim, You are welcome. I think what the others' responses were focused on is the concept that the AC should cool down the house in a few minutes from a hot soak. A well designed and installed system will make a dent, but it can't pull it…"
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