Items Tagged with 'ACCA Manual'

 The only app being powered by ACCA’s extensive manuals has just hit the market — and this is only the beginning.

When a homeowner complains their house feels “hot and sticky” even at 68°F, the problem often isn’t the part you’re about to replace — it’s a missing Manual J calculation. 

With studies revealing that up to 90% of systems are installed with critical faults, the HVAC industry is facing a legal reckoning. 

The proposed Addendum B would correct definitions for “Two-Speed Heat Pump Sizing Condition” and “Variable-Capacity Equipment Sizing Condition” to be consistent with the sizing condition requirements in the standard.

The Manual D procedures match duct system resistance (pressure drop) to blower performance (as defined by the HVAC system manufacturer’s blower performance tables). This delivers appropriate airflow to the rooms and spaces to be conditioned while ensuring that system airflow is compatible with the operating range of the HVAC equipment.

The review involves only the additional modifications that were made based on comments received about the first ANSI public review draft,