Aerotech Fans
Loading industrial-grade components...
Aerotech Fans
Loading industrial-grade components...
Technical answers to common questions about air handling units.
In extreme climates where cooling 100% hot outdoor air requires massive chiller tonnage, an enthalpy heat recovery wheel typically recovers 60-80% of the energy. This aggressive reduction in the required cooling load usually results in an ROI (payback period) of 12 to 18 months.
A Barometric Relief Damper is a gravity-operated pressure valve used in tightly sealed buildings. When the HVAC system brings in high volumes of fresh outside air, internal pressure rises. The barometric damper automatically swings open to relieve this excess static pressure, preventing doors from becoming stuck.
Electronically Commutated (EC) motors have integrated microprocessors that continuously output rich telemetry via Modbus. The BMS can actively monitor real-time RPM, precise power consumption (Watts), internal stator temperature, and fault codes, enabling a fully digitized, smart-building HVAC architecture.
In a draw-through AHU, the fan is located downstream of the cooling coil, placing the coil under negative pressure (requiring a deep P-trap for condensate drainage). In a blow-through AHU, the fan is upstream, pushing air through the coil under positive pressure, which improves air distribution but adds motor heat to the conditioned air.
Cleanrooms classified as ISO 5 (Class 100) or cleaner strictly require terminal HEPA or ULPA filtration mounted directly in the ceiling grid. Centralized HEPA filters in the AHU are insufficient for these classes due to the risk of particulate shedding within the downstream ductwork.
Yes, modern AHUs integrated with IoT differential pressure transmitters continuously track the pressure drop across the HEPA filter bank. The BMS applies predictive algorithms to the pressure curve, generating an alert precisely when the filter is approaching its terminal resistance, avoiding premature replacement costs.
The Sensible Heat Ratio (SHR) is the proportion of sensible cooling (lowering temperature) to total cooling (sensible plus latent/moisture removal). In a data center, the SHR is nearly 1.0 because there is no moisture load. In a crowded theater or humid factory, the SHR drops to 0.6, requiring the AHU coil to run much colder to condense the heavy humidity.
Double-skin Air Handling Units utilize Polyurethane Foam (PUF) injected between two galvanized steel sheets. While primarily designed to prevent thermal bridging, the dense PUF core acts as a massive acoustic dampener, significantly reducing the breakout noise from the high-static centrifugal blowers inside.
Yes, modern industrial AHUs feature onboard PLCs equipped with native BACnet/IP or Modbus RTU communication protocols. This allows the central Building Management System (BMS) to remotely monitor chilled water valve positions, VFD frequencies, and filter differential pressures in real-time.
A terminal HEPA filter is located at the very end of the ductwork, right at the ceiling diffuser of the cleanroom. This ensures the air is sterilized of 99.99% of particles down to 0.3 microns immediately before entering the occupied zone, preventing contamination from ductwork shedding.
An enthalpy wheel is a rotating desiccant-coated matrix that transfers both sensible heat (temperature) and latent heat (humidity) between the hot incoming fresh air and the cold exhaust air, recovering up to 80% of the HVAC energy that would otherwise be wasted.
Electronically Commutated (EC) motors are brushless DC motors that maintain peak electrical efficiency across their entire variable speed range. They consume up to 50% less power than traditional AC motors and operate with drastically lower acoustic noise, making them ideal for commercial FCUs.
