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 cancer. There are three common types of non small cell lung cancer. These are grouped together because they behave in a similar way and respond to treatment in a different way to small cell lung cancer. They make up about 87 out of 100 lung cancers in the UK (87%).here are three common types of non small cell lung cancer. These are grouped together because they behave in a similar way and respond to treatment in a different way to small cell lung cancer. They make up about 87 out of 100 lung cancers in the UK (87%).