One real house — a 2,400 sq ft, 2-story single-family residence in a mixed-humid climate — carried through all 6 stages of residential HVAC design, from Manual J load calculation to a finished commissioning checklist.
6 steps. Steps 1-2 are free. Steps 3-6 unlock with a one-time $4.99 purchase.
Room-by-room heating and cooling load per ACCA Manual J, sized against this house's real envelope.
A heat pump with electric backup, sized to the calculated load and checked at real design conditions.
Supply and return ductwork sized per Manual D — trunk sizing, branch runs, static pressure budget.
Whole-house mechanical ventilation sized per ASHRAE 62.2 for this tightly-sealed house.
Staging strategy, thermostat selection, and zoning for the 2-story heat pump system.
The finished system verified — airflow, refrigerant charge, static pressure, and controls all confirmed.
Educational project reference. This project walks through a realistic scenario using the site's real calculators and written guides — it is a learning and reference resource, not a permit-ready construction document. Final system design, code compliance, and installation require a licensed engineer or contractor. See our full disclaimer.