Greenhouse Auto Vent

An alternate system runs on the fog or great mist injected into the intake air stream. Although a number of commercial systems can be found, growers can assemble and install their own system utilizing a high pressure piston pump and fog nozzles. The essential components are shown in Fig. 1. A two-stage system managed by a two- stage Greenhouse Auto Vent thermostat allows more water to be applied on excessively warm, bright days. Temperature settings ought to be 5-10°F apart.

Algae development in the pads can become a problem that may decrease the effectiveness of the system and result in accelerated deterioration of the pads. The addition of an algaecide to the water supply can help in control.

It really is desirable, especially in hard drinking water areas, to include a wetting agent to the water to obtain additional uniform wetting of the pads. A commercial material or liquid household detergent at the rate of 2 tablespoons per 100 gallons can be used.

Water for the pads should be clean and low in mineral content to prevent clogging and coating of the pads. A pump, pipes and gutters are accustomed to recirculate the water. A flow rate 113 gallon each and every minute per linear foot of pad system should be provided to make certain adequate wetting.

In the most typical cooling system (fan and pad), the fans draw air through wet pads that lengthen the length of 1 endwall or sidewall. Aspen and covered cellulose are normal pad materials that usually have life of one to 3 years. Approximately one sq . foot of pad are is needed for 20 square ft of floor area.

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