Manual N Light Commercial Load Calculation
ACCA Manual N loads for small and light commercial buildings.
What it is
Manual N is the ACCA standard for commercial load calculations on buildings up to roughly 100,000 sq ft. It accounts for occupancy schedules, ventilation per ASHRAE 62.1, internal equipment loads, and zoning needs that Manual J doesn't cover.
Who needs it
- Small offices, retail, restaurants, and medical buildings
- Tenant fit-outs and change-of-use projects
- Permit packages where the AHJ requires commercial load documentation
What's included
- Block and zone-level heating and cooling loads
- Ventilation calculations to ASHRAE 62.1
- Internal gains from people, lighting, and equipment
- Stamped PDF report ready for permit submittal
FAQ
How is Manual N different from Manual J?
Manual J targets residential envelopes and steady-state occupancy. Manual N adds commercial occupancy schedules, ventilation code compliance, and higher internal gains typical of commercial spaces.
Pairs well with
Most projects bundle Manual N Light Commercial Load Calculation with the services below.
Get a same-day quote on your load calculation.
Upload your plans, get a quote within hours, and receive a permit-ready report from a named, ACCA-certified designer.