|
The Retrotec DM-2A manometer gauge measures and controls pressure and air flow automatically. Air change rate, ELA or air flow per unit area results without a computer!
The Retrotec 3200 Fan has a variable frequency drive that runs on both 110 and 240 Volts. On 50 Hz other fans slow down to 4000 + cfm while this fan still puts out 8000 cfm! Built in computer controls pressure or flow. | 
