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.
Lung cancer that has spread to the liver, sadly, has a poor prognosis.The median survival for people living with stage 4 non-small cell (metastatic) lung cancer is only around eight months, though there is hope that newer statistics based on people with fewer liver metastases treated with the newer radiation techniques will result in higher survival ...