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.
Training and equipment. 1  Many pesticide products that the public purchases and uses are ready-to-use (RTU) formulations which require no dilution and can be applied quickly and conveniently. Examples of ready-to-use formulations used by homeowners are granules for insect and weed control and baits for rodent control.