Master Flow Universal Manually Adjustable Humidistat for Power Vents

The GAF Master Flow Adjustable Humidistat is compatible with all single speed power vents and fully adjustable for all climate conditions. Activated by humidity, helping power vents reduce damaging moisture or heat from accumulating in your attic. UL Listed and wired for easy installation.

• Adjustable humidistat
• Universal compatibility - works with all single-speed power vents
• Pre-wired for installation