Fan Speed Controller Day/Night With Photpcell Fans & Filters plant size

plant size

Sylvania High Pressure Sodium (HPS) lamps are one of the most efficient HID light sources available

6400K lamp

These flat white horizontal reflectors are light weight and durable

household plants

Fan Speed Controller Day/Night With Photpcell Fans & Filters plant sizeThis Dual Stage Fan Speed Controller will adjusts the exhaust of the fan speed automatically. It has two separate speeds which can be controlled by any power switching device; timer or thermostat. Usage Day Night fan speed control Maintaining negative pressure while thermostats are off. Backup cooling and negative pressure system. Applications that require your vent fan to operate at different speeds while maintaining negative pressure.