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and safety limit circuits
3-inch frame and an open air-over enclosure
because the Parker 71215SN2MN00 is a direct-acting valve
Industry-standard 1/4" terminals allow for immediate integration without rewiring
Aprilaire 4655 Humidifier Control 328140-751 and safety limit circuitsThe Aprilaire 4655 Humidifier Control is a reliable, manual humidistat designed to provide precise low voltage 24V management for your central heating and cooling system. This essential HVAC humidity sensor utilizes a highly sensitive mechanical nylon ribbon filament that expands and contracts based on moisture levels, ensuring your whole house humidifier operates only when necessary. By manually adjusting the relative humidity (RH) setpointtypically
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