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.
Non-Small Cell Lung Cancers: Non-small cell lung cancer accounts for 80 percent of lung cancers. Up to 50 percent of non-small cell lung cancers are considered adenocarcinomas. This type of lung cancer is often seen in non-smokers and is the lung cancer type most commonly found in women. Non-small cell lung cancer usually begins in the periphery (outer parts) of the lungs, and it can be present for a long time before it is diagnosed.