All Retrotec fans are made with extremely durable space-age hard plastic foam, which makes them both lightweight and and tough. They are also easily reversible: to switch from pressurizing to depressurizing your enclosure, simply flip the fan around in its panel.
The DM-2A that comes with this system offers an onboard "Set-and-Forget" control of enclosure pressure and flow pressure. All you need to do is choose your desired pressure, and then let the DM-2A do the rest. As you seal the leaks in your enclosure and the leakage rate decreases, the system automatically and instantly readjusts to the correct pressure.