Observed arrival · 2026-09-10
Design Day puts Manual J and Manual D on an iPhone
A field tool that scans or traces a house, calculates room-by-room heating and cooling loads, and lays out ductwork on the same floor plan.
Field notes
The proposed workflow accepts LiDAR scans, manually tapped room corners, blueprint PDFs, or typed measurements before calculating room-level heating and cooling loads. Users can then place trunks, branches, and takeoffs on the same plan, with duct sizes and velocities tied to a friction rate derived from blower static pressure. The report is described as including an outlet schedule, footage grouped by duct size, fitting counts, and a scaled drawing. The site explicitly says the software is not ACCA-approved.
Observed signals
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Editorial observations of this landing page, not a rating.
One card from the complete issue