HVAC track
Room volumes first, then equipment and duct runs.
New here? Start with The Basics first; this track assumes it.
Turn rooms into areas and air volumes for sizing, then count equipment and measure duct runs across mixed-scale sheets.
1
Measuring room volumes with the Room Sizer
Draw room boxes, give each a ceiling height, and get floor area and air volume per room: the numbers behind airflow, air changes, and equipment sizing.
2
Doing an HVAC takeoff
Room volumes and CFM targets, diffusers that carry their air, a duct main the app sizes as you trace, fittings that count themselves, and a bid weight in pounds.
3
Scale zones and multiply zones
Handle multi-scale sheets and repeated areas: give a region its own scale, or multiply everything inside a boundary so typical floors and units count correctly.