Manual J Load Calculation
Room-by-room heating and cooling loads to ACCA Manual J 8th Edition.
What it is
Manual J is the ACCA-standard residential load calculation. It accounts for your project's actual envelope, windows, infiltration, climate zone, and internal loads to produce a room-by-room BTU requirement — the foundation every other HVAC decision is built on.
Who needs it
- Permit submittals in any of the 29 states that require ACCA Manual J
- New construction and major remodels
- HVAC equipment changeouts where you want the right size, not the same size
- Builders and architects who need stamped calcs for inspection
What's included
- Room-by-room heating and cooling loads (BTU/h)
- Full envelope, infiltration, and internal-gain breakdown
- Whole-house and per-zone totals
- Stamped PDF report ready for permit submittal
- Designer-of-record contact for AHJ questions
FAQ
Will my building department accept it?
Yes. Our reports are ACCA-compliant Manual J 8th Edition and accepted in 29+ states. If your AHJ requests revisions, we handle them.
What file formats can I send?
PDF, DWG, or clear photos of marked-up plans. We'll follow up if anything is unclear.
Pairs well with
Most projects bundle Manual J 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.