iO HVAC Controls

BH and BV series barometric bypass dampers are used to automatically bypass excess air when increases in duct static pressure occur due to closing ...

The Heat Pump Alert (iO-HPA) is like a nosy neighbor keeping an eye on your heat pump system. It monitors the “W” voltage signal, the temperature o...

 This 24V-powered lead/lag controller packs a punch for balancing the operational time of two redundant devices. The iO-LL is microprocessor-contro...

The manual balancing dampers are just bursting with possibilities! From huge commercial duct systems to single rooms in a house, you can find the i...

The UMM-CS monitors the current to the HVAC blower.  If no current is detected after six seconds, the relay contacts can be used to trigger an alar...

The UMM-RP keeps a close eye on the cold brew pressure of your compressor. When the refrigerant dips below the pre-set pressure control, it throws ...

 The UMM-SP is your HVAC hero, watching over your system like a hawk. If it senses a lack of airflow while the compressor is running, it jumps into...

The UMM-FS monitors the suction line temperature through a FS-38 Freeze Stat to prevent coil freeze up. If the suction line temperature falls below...

Our Universal Twinning Kit is like a party starter for your HVAC systems - it allows one thermostat to control up to four units, no sweat! You don'...