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.
How are the results of the glucose tolerance test evaluated? Glucose tolerance tests may lead to one of the following diagnoses: Normal response: A person is said to have a normal response when the two hour glucose level is less than 140 mg/dl, and all values between 0 and 2 hours are less than 200 mg/dl.