this program is good
Superb Pls extend the CFM for free usage
Started out great. Worked great for months. Suddenly won't calculate anything. Installed twice at $11.00 each time. Support could not address and fix the problem. Back to my faithfull cardboard duculator.
Update for compatibility with OS 5 & 6 devices
Reads/logs data for: pressure, temperature, humidity, and air velocity/volume.
Accurately size HVAC equipment! Print a report to obtain permit! Sell more jobs!