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Manual S Equipment Selection Report

A Manual S Equipment Selection Report documents how selected HVAC equipment was matched to the Manual J design load, following the ACCA Manual S methodology. It records the AHRI-rated capacities at design conditions, the cooling and heating oversize percentages, and whether the equipment’s sensible heat ratio (SHR) will maintain adequate humidity control.

ACCA Manual S, AHRI equipment ratings, IECC/state energy codesValid: One-off (no expiry)

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Sample Manual S Report certificate

Sample Manual S Equipment Selection Report certificate created with CertBox, showing the professional PDF layout with manual j design load reference, selected equipment make, model, and ahri-rated capacity, cooling oversize (≤115% of load) and heating oversize (≤140% of load)

Sample Manual S Report with fictional data. All personal details shown are fake.

What it covers

  • Manual J design load reference
  • Selected equipment make, model, and AHRI-rated capacity
  • Cooling oversize (≤115% of load) and heating oversize (≤140% of load)
  • Equipment SHR vs. design load SHR
  • Overall pass/fail result

Who needs a Manual S Report?

HVAC contractors
Duct/system designers
Building departments
Homeowners (new construction/replacement systems)

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Frequently asked questions about Manual S Report

Why can’t I just pick the next-size-up unit?
Oversized cooling equipment short-cycles, which leaves the space cold but humid because the system never runs long enough to remove moisture. Manual S limits cooling capacity to ≤115% of the design load and heating to ≤140% specifically to control this — bigger is not automatically better.
What is SHR and why does it matter?
Sensible Heat Ratio (SHR) is the fraction of total cooling capacity that goes to temperature reduction versus dehumidification. If the equipment’s rated SHR is higher than the Manual J design load SHR, the system will under-dehumidify — the space feels cool but clammy, even at the right temperature.

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