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.
Essential thrombocythaemia (ET) is a rare condition which affects the bone marrow â the spongy material found in bones. Bone marrow is where our blood cells are made. In ET, too many platelets are made. Platelets help the blood to clot. ET usually affects people over 50. It doesnât always cause symptoms and may be found after a blood test is taken for other reasons. Your doctor may suggest particular blood tests to diagnose ET.