Heat distribution unit. The Heat Distribution Unit (HDU), also known as a Heat Interface Unit (HIU), provides domestic hot water (DHW) and space heating to properties that are serviced from district heating or centralised boiler plants.
Called hypoglycemia, this deficiency of glucose in the blood is considered critical at, or below, 40 milligrams of glucose per deciliter of blood, or 40 mg/dL. However, this figure must be adjusted individually, as the exact level at which an a person develops symptoms varies.
Blood sugar or blood glucose are shortened terms for blood sugar concentration or blood glucose level. Most mammals maintain their blood glucose levels at between 3.6 and 5.8 mM (mmol/l). The average human blood glucose level is approximately 90 mg/dl, which is equivalent to 5mM (mmol/l).