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.
Glucose Levels Normal Range. The amount of glucose or sugar present in the blood is what determines the glucose levels normal range. Glucose is the body's source of instant energy. The normal blood sugar levels is a range that helps to determine whether the insulin levels in the body are normal or not.he American Diabetes Association recommends a post meal glucose level of less than 180 mg/dl. Below Glucose Levels Normal Range. When the glucose levels are very low, that is, below 80 mg/ dl, then it is known as hypoglycemia.