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.
The metastatic tumor is the same type of cancer as the primary tumor. For example, if primary liver cancer spreads to the lung, the cancer cells in the lung are actually liver cancer cells. The disease is metastatic liver cancer, not lung cancer.The Barcelona Clinic Liver Cancer Staging System may be used to stage adult primary liver cancer.he metastatic tumor is the same type of cancer as the primary tumor. For example, if primary liver cancer spreads to the lung, the cancer cells in the lung are actually liver cancer cells. The disease is metastatic liver cancer, not lung cancer.