AHU Controllers Explained
AHU Controllers ExplainedAn air handling unit moves and conditions a lot of air, but on its own it can't decide when to run, how hard to run, or how to…
VAV Box Explained: How Variable Air Volume Control Works
VAV Box Explained: How Variable Air Volume Control WorksA VAV (Variable Air Volume) box sits between the central air handling system and individual zones, adjusting how much conditioned air reaches…
Damper Actuators Explained: Spring Return vs Non-Spring Return
Damper Actuators Explained: Spring Return vs Non-Spring ReturnA damper actuator turns a control signal into physical movement — opening or closing an air damper to modulate airflow or, in a…
HVAC Sensor & Flow Switch Selection Guide
HVAC Sensor & Flow Switch Selection GuideFor the shared principles behind how every sensor works, see our How HVAC Sensors Work guide.A building automation system is only as good as…
CO2, Enthalpy & Occupancy Sensors Explained: Demand-Controlled Ventilation
CO2, Enthalpy & Occupancy Sensors Explained: Demand-Controlled VentilationBringing in more outdoor air than a space actually needs wastes energy conditioning it; bringing in too little hurts indoor air quality. CO2,…
Temperature Sensors for HVAC: Wall, Duct & Room Types Explained
Temperature Sensors for HVAC: Wall, Duct & Room Types ExplainedEvery control loop in an HVAC system starts with a temperature reading from somewhere — a room, a duct, a coil,…
Differential Pressure Switches & Transmitters for HVAC Explained
Differential Pressure Switches & Transmitters for HVAC ExplainedWhere a flow switch answers "is fluid moving," a differential pressure device answers a related but distinct question: "what's the pressure difference across…
Industrial Valve Selection Guide: Matching Valve Type to Application
Industrial Valve Selection Guide: Matching Valve Type to ApplicationEvery valve on a piping system does one of a small number of jobs — isolate, regulate, prevent backflow, filter, or vent…
Balancing & Pressure Independent Control Valves Explained
Balancing & Pressure Independent Control Valves ExplainedIn any chilled or hot water system with more than one branch, flow doesn't distribute itself evenly on its own — the branch closest…
Ball Valves Explained: Types, Applications & Selection
Ball Valves Explained: Types, Applications & SelectionA ball valve uses a rotating perforated ball to control flow — a quarter-turn from fully open to fully closed. That simple mechanism makes…