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.
What is RTF? It stands for Rigid Thermofoil. It is a very durable, low-maintenance material made to look like real wood, painted surfaces and more. Rigid Thermofoil is a process that uses heat and pressure to bond a thin (8 to 16 mil) Polyvinyl Chloride (PVC) film to a substrate, typically medium density fiberboard (MDF).