Direct drive wall fans are designed for compact and cost-effective through-the-wall general ventilation applications. These multispeed axial fans feature aluminum fan blades and a plated steel wire guard in sizes ranging from 10 to 30 inches.
The redesigned VelociCalc® Model 9565 multifunction ventilation meter is a multifunction anemometer that accurately measures air velocity, airflow, temperature, humidity, and pressure simultaneously, presenting these five parameters on a large graphic display with on-screen messages and instructions in customizable local languages.