Manufacturers have succeeded in selling this technology by emphasizing its energy efficiency and other benefits. The installed cost of VRF systems is about $18 per square foot of conditioned space, while a conventional air-source heat pump system costs about $12 to $15 per square foot.anufacturers have succeeded in selling this technology by emphasizing its energy efficiency and other benefits. The installed cost of VRF systems is about $18 per square foot of conditioned space, while a conventional air-source heat pump system costs about $12 to $15 per square foot.
Essential Thrombocythemia. Essential thrombocythemia (ET) is a type of blood cancer known as a myeloproliferative neoplasm. It involves the abnormal development and function of bone marrow cells that produce blood cells, and leads to the overproduction of blood cells known as platelets.
There are certain types of cancers such as kidney cancers, cancers of the adrenal gland, and liver cancers that can make EPO, and thus, cause polycythemia by increasing the number of red blood cells. . There is probably a hereditary component to these cancers, but as far as I know the genetics have not been mapped out. Finally, there is a condition called polycythemia vera, or polycythemia rubra vera. In this case, the bone marrow itself is producing too many red blood cells. However, there is no outside stimulus.