Art. no.: 45386
The VT20M intermittent Fan Control is designed to meet whole-house ventilation needs outlined in ASHRAE 62.2 Standard.
The model VT20M controller enables the exhaust fan to run at a pre-set speed for a pre-set portion of each hour, 24 hours a day. The high speed override button enables the fan to run at full speed for 20 minutes when needed, for example to vent steam from a bathroom.
Where a single exhaust fan is ducted to draw air from multiple locations, up to three auxiliary fan controls, VT20A, may be used with the main controller, VT20M. The auxiliary controls may be installed in secondary bathrooms etc., where high speed overrides is required.