Noisy equipment, excessive humidity within the home and a unit older than 10 years are among the top reasons to replace your central air conditioning, according to Energy Star, a U.S. government program promoting energy efficiency.ost central air conditioning units come with two-to five-year warranties. Extended warranties can be purchased for an additional price -- usually for several hundred dollars -- and the longer the warranty, the higher the price.
The following are prognostic factors for advanced and metastatic nonâsmall cell lung cancer: 1  number of metastatic sites People with a single metastatic site have a more favourable prognosis than people who have cancer spread to several different sites.
Stage IIIA non-small cell lung cancer (NSCLC) is a single cancer mass that is not invading any adjacent organs, but has spread to nearby lymph nodes in the chest.ecause stage IIIA cancers have spread to nearby lymph nodes, it is also possible that some cancer cells have spread to other locations in the body. These small amounts of cancer cannot be detected with any of the currently available tests.