Polar animals are either covered in winter coats of fur â which traps warm air close to the body â or else large quantities of fat, sometimes inches thick. Fat does not transfer heat very well, so it keeps it inside the body. Humans, with naked skin and relatively little fat, just arenât built for these environments.
Essentially, TRu is an expression of contentment, satisfaction, goodness, approval, and/or of course, agreement. It is generally enunciated in a deep, low voice, with a slightly increasing pitch, and the vowel sound of u is elongated without the diphthong.
An RTU is a type of AHU. AHU stands for Air Handling Unit and the acronym RTU means Rooftop Unit. The Roof Top Unit is an outdoor AHU. As RTUs are mounted on the roof, there is no concern about creating extra space indoors for it as would be the case for the other types of AHU.