Permit-ready
Manual J, D & S
in 48 hours.
Climatiq produces ACCA-compliant heat load calculations, duct designs and equipment selection reports for residential contractors. Upload your plans, we deliver the engineering.
Rule-of-thumb sizing wastes money and breaks systems.
Required by IRC & IECC
Section M1401.3 of the IRC requires equipment to be sized per ACCA Manual S, based on a Manual J load calculation. No calculation, no permit.
Stop the short-cycling
Oversized equipment cycles on/off, fails to dehumidify, and creates hot/cold spots. Manual J right-sizes capacity to the envelope you actually built.
15–30% energy savings
A correctly sized system runs longer at lower load and uses significantly less energy. Pairs with rebate and tax credit paperwork (25C, HEEHRA).
Ducts that actually deliver
Manual D sizes every trunk and branch to hit the design CFM at the equipment's available static pressure. Otherwise you're paying for capacity that never reaches the room.
Equipment selection, justified
Manual S matches a specific make/model to the Manual J load at local design conditions. Submitted with permits, satisfies most AHJs on the first review.
Stamped engineering record
You get an archived, reproducible calculation tied to the home — protection for the contractor and homeowner if questions come up later.