ACCA Manual S Reports

The Air Conditioning Contractors of America's (ACCA) Manual S 3rd Edition

is the ANSI-recognized industry standard for selecting the right HVAC system(s) for your home.

Comfort Geeks is Southern Arizona’s source for ACCA Manual S equipment compliance reports and an unrivaled HVAC system selection process. Leverage our industry expertise and strategic partnerships to match up HVAC systems that fit your home like a glove.

What is the ACCA Manual S?

The ACCA Manual S standard is the scientific process used to select the right HVAC system(s) for your home based on the results of the Manual J heat gain/loss report. Some factors considered include local climate conditions, home construction, airflow requirements, and sensible/latent BTU (cooling capacity).

When is ACCA Manual S required?

In southern Arizona (and most other municipalities across the US), a Manual S compliance report is always required to obtain an HVAC system installation or replacement project permit.

If your HVAC contractor isn’t using ACCA Manual S to select your new HVAC system, they’re probably oversizing it.

Manual S Report FAQs:

(click/tap the + next to the Q to reveal the A)

What's the difference between Manual J and Manual S?

ACCA Manual J determines the cooling and heating capacity and airflow needed. Manual S proves that the HVAC system specified provides the correct amount of capacity and airflow without being oversized or undersized.

Don't all 3.0-ton HVAC systems provide the same capacity?

No. Cooling capacity, rated in BTUs (British Thermal Units)— specifically Sensible BTU and Latent BTU, can vary drastically from system to system. The cooling capacity of two 3-ton systems can vary by thousands of BTUs.

What will happen if my new HVAC system is undersized?

– Failure to maintain comfortable indoor temperature and humidity levels.
– Excessive HVAC system runtimes and high energy bills.
– Premature HVAC system failure and costly repair bills.

What will happen if my new HVAC system is oversized?

– Hot/cold spots in your home with poor humidity control.
– System short cycling (rapidly turning on and off).
– Premature HVAC system failure and costly repair bills.
– Reduction in expected operation life (by years).

More questions about ACCA Manual S Reports? Drop us a line!