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.
For instance, an increased creatinine value may be considered critical only if it is a new finding and the patient is not admitted to the dialysis unit; a late-night blood culture demonstrating rare gram-positive cocci in clusters may be called immediately for inpatients but not until the following morning for outpatients; or Dr.