Venstar VSACC0410 Add-A-Wire Relay

The Venstar VSACC0410 Add-A-Wire Relay is a compact HVAC system part designed for the wiring of a thermostat when there is a limited number of wires available. It does this by adding an extra wire to the system, allowing newer thermostats to be compatible with the system that require additional connections. The relay used in this relay is usually used in HVAC systems such as heat pumps, furnaces and air conditioning units. The primary benefit is that it allows users to have advanced thermostat features without having to do a full rewiring and save time. This is a better upgrade solution for older systems.