Old Number W8835A-1004

Use with VisionPRO IAQ Thermostats or FocusPRO communicating thermostats - Expandable to nine zones with additional W8703 Damper Interface Modules and Thermostats

Compatible with conventional gas, oil, electric or heat pump systems up to 3H/2C - Unsurpassed ease of wiring with only three wires to connect between devices

True communicating system using standard thermostat wire

Networked zoning enables these features: Time synchronization, Selectable high and low equipment protection settings, Adjustable purge timing and damper positions

Telephone remote access when used with optional W8735D Telephone Access Modules - Uses Zone of Greatest Demand Intelligence to reduce system cycling