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.
Overview. The term thrombocythemia is preferred when the cause of a high platelet count isn't known. The condition sometimes is called primary or essential thrombocythemia. This condition occurs if faulty cells in the bone marrow make too many platelets. Bone marrow is the sponge-like tissue inside the bones.