Aprilaire Single or Multi-Stage Heat/Cool or Heat Pump 3-Zone Control Panel w/ LCD Display

The Model 6404 or 6403 Zone Panel can be configured to control heat pump or conventional applications. The Model 6403 can control up to 3 zones. The 6404 can control up to 4 zones and is expandable up to 12 with the use of the Model 6401 two-zone expansion panel. The features include: 2 heating and two 2 cooling stages (conventional) 4 heating and 2 cooling stages (heat pump) Integrated balance point control Equipment protection