Air valves and critical airflow control

• Air valve controls integration with BACnet

  Learn how air valve and room controllers communicate over BACnet, which points to expose, how to divide control responsibilities, and how to test integration.

• Air valve materials and coatings for corrosive exhaust

  Learn the corrosion risks in lab and process exhaust, the material and coating options for air valves, and how to match them to the chemicals in use.

• Air valve sizing and turndown

  Learn how to select air valve size and pressure class from minimum and maximum airflow, why turndown matters in labs, and the common sizing mistakes to avoid.

• Commissioning and verifying venturi air valves

  Learn what to check before, during and after functional testing of venturi air valve systems, and how to document results that the owner can rely on.

• Fume hood face velocity control and sash sensing

  Learn how variable air volume fume hoods control face velocity, how sash and velocity sensors work, and what to check when commissioning or certifying them.

• Hospital isolation room airflow control with air valves

  Learn how air valves are applied to airborne infection isolation and protective environment rooms, how to handle anterooms and mode switching, and what to verify.

• Laboratory airflow control systems

  Learn the components of a lab airflow control system, the control modes that drive room airflow, and the design and operating choices that affect safety and energy use.

• Manifolded lab exhaust systems

  Learn how manifolded lab exhaust works, its advantages over individual hood fans, how pressure and stack velocity are controlled, and the design checks that matter.

• Pressure-independent airflow control without flow measurement

  Understand the physics behind sensorless pressure-independent airflow control, how factory characterization replaces field flow sensing, and the conditions it depends on.

• Retrofitting lab airflow controls

  Learn how to assess an existing lab building, choose retrofit measures such as VAV hoods and lower minimum air changes, and phase the work while labs stay in use.

• Room pressurization control: offset vs direct pressure

  Learn how flow offset and direct pressure control maintain room pressure, the strengths and weaknesses of each, and when a cascaded approach makes sense.

• Shut-off and two-position air valves

  Learn how two-position and shut-off air valves work, where they suit better than fully variable control, and how to design and test them for room isolation.

• Venturi air valves explained

  Learn how a venturi air valve works, why it is pressure independent without a flow sensor, how it is controlled, and where it is used in critical spaces.

• Venturi valves vs VAV boxes with airflow stations

  Compare how venturi valves and sensor-based VAV terminals control airflow, where each performs best, and the questions to ask when choosing between them.

• Vivarium and animal facility airflow control

  Learn the airflow requirements for animal holding and procedure rooms, how ventilated cage racks and air valves are integrated, and what to verify in a vivarium.

All guide topics