| Compatible Models | : | 400M, 400MK, 400MZ, 400MKZ, 500M, 500MK, 500MZ, 500MKZ, 600M, 600MK, 600MZ, 600MKZ, 620M, 700M, 700MZ, 700MKZ, 720M, 720MKZ |
| Depth | : | 5-1/8 in |
| For Use With | : | 400M, 400MK, 400MZ, 400MKZ, 500M, 500MK, 500MZ, 500MKZ, 600M, 600MK, 600MZ, 600MKZ, 620M, 700M, 700MZ, 700MKZ, 720M and 720MKZ Whole-House Humidifiers |
| Function Type | : | Manual Humidistat |
| Height | : | 3-3/8 in |
| Material | : | Plastic |
| Product Type | : | Manual Humidistat |
| Width | : | 1-15/16 in |
The AprilAire 4655 manual humidistat for AprilAire Humidifiers can be installed on a living space wall or return duct-mounted. The 4655 manual humidistat is the tried and true method of simple humidifier control. Utilizing a mechanical filament to measure changes in humidity, this humidistat provides a dry-contact closure that can be used with evaporative or steam humidifiers, past or present.
Aprilaire® 2-Wire Manual Humidistat, 3-3/8 in Height, 1-15/16 in Width, 5-1/8 in Depth
An increase in relative humidity (RH) expands the nylon ribbon which opens the control switch to stop operation of the humidifierA decrease in RH reverses the process and closes the control switch, turning on the humidifier This control can be mounted on a living space wall or on a return duct and must be a 24 VAC circuit only The AprilAire 4655 is designed in the USA by AprilAire, the leader in indoor air quality solutions for the home since 1954 and comes with a 5 year warranty
