How VFDs Work in HVAC: VFD Basics & Applications
VFDs are very common in HVAC, especially new HVAC systems. They are devices that can improve the energy efficiency of various HVAC systems. So, how VFDs work in HVAC? First…
HVAC BMS Integration: Basics, Components and Controls
BMS integration is becoming an essential part of HVAC. Many air conditioners, ventilation fans, sensors and controllers are remotely monitored and controlled by BMS. So, what exactly is the integration…
How HVAC Relays Work? (Actual Applications)
Relays can be found in almost all HVAC systems. They are typically located inside HVAC control panels or within the HVAC unit itself. I’ve always been curious how HVAC relays…
What is PLC in HVAC? (CPU, Module, HMI, Analog & Digital)
Complex HVAC systems often use a PLC to control. Terms like CPU, module, HMI, AI/AO and DI/DO are common in PLC. I happened to work on a few HVAC projects…
5 Types of HVAC Controls (Thermostat, DDC, 0-10V & Dry Contact)
HVAC equipment such as air conditioners, ventilation fans, chillers, cooling towers and pumps need to receive signals in order to run, stop, regulate and trip. Without signals, these machines don’t…
How Air Conditioner Control Room Temperature?
We use a remote controller or a thermostat to set the temperature that we want for the air conditioner to cool our room. Then, how does the air conditioner know…
