Barns and other agricultural enclosures require extra care in controlling their ventilation systems. This Hired Hand Photohelic Power Vent Control is used to control vent inlets. Maintaining a slight negative pressure inside a building ensures that air flows in evenly from all openings in the building.

As static pressure increases, the speed of the incoming air increases. It is important to set the pressure at the appropriate level to ensure maximum efficiency. Too little vacuum, and the livestock could suffer from drafting, and temperature shock. Too much vacuum, and fan efficiency is reduced, increasing the levels of moisture, and ammonia in the enclosure, also driving up electricity costs.

The Photohelic Power Vent has been designed with the producer in mind. Routine tasks such as changing the pressure limits are easily reset, and are familiar in nature.

This controller has only two basic settings: Target High Pressure and Target Low Pressure. The controller will open and close the vents as needed to maintain pressure between these limits. The Photohelic gauge has two knobs on the Dwyer gauge, one for the Low limit and one for the high limit. Turn the knob clockwise to increase the setting and counterclockwise to decrease.

• High Pressure When pressure is above the high limit, the vent machine will open vents to lower pressure
• Room Pressure When pressure is in between the high and low pressure limits, the controller will not adjust vents
• Low Pressure When pressure is below the low limit, the vent machine will close vents to raise pressure