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.
The ESPEN guidelines for critical care suggest a maximum caloric intake of 20-25 kcal/kg/day during the acute and initial phase of critical illness, but 25-30 kcal/kg/day during the anabolic recovery phase.2 Certain patients (eg, malnourished or morbidly obese) may have different caloric requirements than the standard patient.