Zone First MZS4 4 Zone 2Ht/2Cl Zone Control Panel. This panel is compatible with any type of forced air heating and cooling system. Compatible with any type of thermostat and allows for 3 stages of heating and cooling as well as heat pumps. It is expandable up to 10 zones by adding the MZA2 panel. Built in LEDs provide system Thermostat us and color-coded screw-less terminal blocks make for simple and fast wiring.
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