Everything you need to know about relays

A relay is just a switch. The purpose of any switch is to turn something on and off. A relay turns HVAC equipment on or off. It’s that easy.

A relay is just a switch. The purpose of any switch is to turn something on and off. A relay turns HVAC equipment on or off. It’s that easy.

A thermostat is also just a switch that turns HVAC equipment on and off. So why would we bother adding a relay to an HVAC system when we already have a thermostat?

A relay gets us around the requirement that every device in an electrical circuit has to be the same voltage. A thermostat is usually low voltage, 24V. The HVAC equipment

Register to view the full article

Registration on Contractor allows you exclusive access to high value content centered around proprietary research, expert analysis, and in-depth technical procedures.