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A large and mid size building test kit. The lightweight, 3-fan, door panels can be carried under your arm, and set up in minutes in any doorway. Heavy duty commercial 2 hp fans can run all day, at any speed, without over heating. Ideal for TM23 testing UK standards up to 4,800 m2 floor area or for pressurizing large buildings for thermography. The Variable Frequency Drive generates the 3 phase power, but uses a regular single phase wall outlet power; either 110 or 240 Volts.
The Retrotec QMG door fan system consists of one DM-2A, one DM-2, three 3300 Fans and a hard plastic 3 fan door panel. Ask about adding fan cases, software, grill mask and other accessory options.
One DM-2A measures pressure and controls the three fans automatically. A second DM-2A displays flow pressure for the other two fans. A third DM-2 could optionally be added so that each fan would display the flow for that particular fan.
The three 3300 fans have three variable frequency drives, that run on both 110 and 240 Volts. At 50 Hz other fans slow down to 4000cfm, but these fans still put out 8000 cfm! | 
