Digital Humidistat Automatic 24 Volt Control with Blower Activation

The Digital Humidistat Automatic 24 Volt Control with Blower Activation (AP-60) provides automatic humidity management for Aprilaire bypass and powered humidifiers by adjusting indoor RH based on outdoor temperature and allowing blower-only activation for improved moisture distribution. Measuring approximately 5.9 in height (H) × 3.4 in width (W) × 1.2 in depth (D), the control mounts to a return duct or wall surface using the included installation plate and connects via a 24 volt two-wire circuit. It is compatible with Aprilaire 400, 500, 600 and 700 series humidifiers using automatic controls. Technicians verify job fitment by confirming the humidifier model, available 24 volt control wiring and mounting orientation. This replacement restores accurate humidity tracking, blower activation logic and reliable call-for-humidity performance.