MechLedger HVAC Mobile app
HVAC project organization on your phone
Keep client details, calculations, materials, photos and reports organized by project on your phone.
HVAC design and project organization
MechLedger
Two tools for HVAC work: project organization on your phone, and ductwork design with quantity takeoffs in CAD.
MechLedger HVAC 
CAD add-on
In developmentCAD ductwork design and takeoffs
An add-on in development for duct networks and drawing-based quantity takeoffs. It is not yet publicly available.