One of the most common myths about nodules is the diagnosis itself! Usually doctorâs donât have the necessary equipment (stroboscopy) to diagnose vocal problems. So all problems are called nodules. Every singer has a colleague who had ânodulesâ for this reason.
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.
A BTU is a measure of energy. There is no way to compare them. Possible meaning: 1 ton of cooling is often used to describe 12,000 BTU peâ¦r hour, so 36,000 BTU/h is equal to 3 tons of cooling. Amir Karimipour.