The standard establishes how to audit, evaluate, develop a scope of work, perform the work approved by a homeowner and test completed work.

The Air Conditioning Contractors of America Educational Institute Standards Task Team announced that the American National Standards Institute has recognized ACCA 12 QH-2011 Existing Homes Evaluation and Performance Improvement standard. ACCA 12 QH-2011 is the first industry-developed, nationally recognized standard that establishes how to audit, evaluate, develop a scope of work, perform the work approved by a homeowner and test completed work.