According to ACR, The NADCA Standard, properly performed HVAC system cleaning services should:
According to ACR, The NADCA Standard, properly performed HVAC system cleaning services should:
According to the NADCA (National Air Duct Cleaners Association) Standard, properly performed HVAC system cleaning services should render the system visibly clean. This means that all the key components of the system should be free from visible dust and debris after cleaning. Ensuring visible cleanliness is a standardized measure of quality in HVAC cleaning services.
I agree, so what is the right answer?
It should be visibly clean as per the NADCA