American Aldes (Sarasota, Fla.) showcased its MPV (multi-port ventilators) central exhaust ventilation systems for low-rise multifamily housing are designed to exhaust multiple bathrooms, kitchens, utility rooms, etc., with remotely mounted central fans. The product is also suitable for use in large single-family residences.
The system uses constant airflow regulators (CARs), which are placed at either the grille or in the fan take-offs, and which have preset airflows. At minimum static air pressure, the bulb is deflated, at which point it has an hourglass shape. As static pressure increases across the bulb, it inflates, “thereby reducing the free area around the bulb,” the company explains. At the same time, the higher static pressure increases the air velocity, resulting in constant airflow, the company claims.