In what sequence is an HVAC system typically cleaned?
In what sequence is an HVAC system typically cleaned?
The typical sequence for cleaning an HVAC system is return, air handler, and then supply. This sequence ensures that contaminants are removed in the direction of airflow, starting from where air enters the system (return) to where it is distributed (supply). Cleaning the air handler in between ensures that the central component of the system is cleaned before air moves through the supply ducts.
Return unit supply you need to go with the flow of air to properly clean the system per NADCA
Definetely D. Found in page 95 of the ACR Standard Training Course Handouts - 2016