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How the Cold Air Drain® Works

Radiation frosts occur during clear, cold nights with no wind. The ground loses heat stored during the day allowing an inversion layer to develop. In an inversion, the warmer air layer sits above the cold air layer that is closest to the ground.

During a radiation frost night, the heaviest cold air molecules flow downhill, like water, due to gravity. This cold air settles in low elevation areas that do not allow for adequate drainage. As the cold air accumulates in an area, frost damage occurs.

The Cold Air Drain® thrusts the cold air upward to a height of nearly 300ft (91.44m). As the coldest air is being sent up, it collects and mixes with the warmer, lighter air from above.  This helps to give the cold air continuous lift and allows it to rise higher, until it is dispersed into the upper inversion layer. The coldest air layer is drained and will not fall back down.  

The Cold Air Drain® effect changes the temperature in the lower elevation, frost-prone areas to be more similar to the temperatures in the higher elevation, non-frost areas. The grower may expect a more consistent yield in the lower and higher elevation areas.

Model 1550

Cold Air Drain®

Power Options

#EM3: Electric Motor, 3ph

15 HP, 230/460 VAC three phase, 34/17 FLA, Nord helical gear reducer, TEFC

 

#EM3/AS: Electric Motor, 3ph, with Auto-Start

15 HP, 230/460 VAC three phase, 34/17 FLA, Nord helical gear reducer, TEFC, solid state process controlled auto-start, Nema 3R waterproof controller housing, temperature controlled auto-start and stop, manual override, includes motor starter and controls

 

#EM1-10: Electric Motor, 1ph

10 HP, 230 VAC single phase, 40 FLA, Nord helical gear reducer, TEFC

 

#EM1-10/AS: Electric Motor, 1ph, with Auto-Start

10 HP, 230 VAC single phase, 40 FLA, Nord helical gear reducer, TEFC, solid state process controlled auto start, Nema 3R waterproof controller housing, temperature controlled auto-start and stop, manual override, includes motor starter and controls

 

#HVT20: Honda V-Twin Gasoline Power Unit

Environmental Protection Agency (EPA)-certified Honda GX630 engine, V-twin, air cooled, OHV design, Nord helical gear reducer, oil alert system, mechanical fuel pump, EPA- and CARB-certified fuel gank-20 gallons, fuel consumption approx. 1.5 gal./hr, 10 amp charge circuit, 12V battery, tachometer, PTO pump adapter

 

#H15/AS/5 Honda Gasoline Power Unit with Auto-Start

Environmental Protection Agency (EPA)-certified Honda iGX 440 engine (approx. 15 HP), computer controlled choke advance, computer controlled throttle advance, Nord helical gear reducer, temperature controlled auto-start and stop, manual override, oil alert system, EPA- and CARB-certified gravity feed fuel tank-20 gallons, fuel consumption approx. 1.1 gal./hr, 10 amp charge circuit, 12V battery, solid state process controlled auto start, Nema 3R waterproof controller housing, PTO pump adapter

 

#SPVT-25 Subaru Propane V-Twin Power Unit

Subaru 25HP V-Twin engine, air-cooled, 4-stroke, overhead valve (OHV) design, Nord helical gear reducer, oil alert system, 20 amp charge circuit,12V battery, PTO pump adapter, tachometer

 

#SPVT-25/AS Subaru Propane V-Twin Power Unit with Auto-Start

Subaru 25HP V-Twin engine, air-cooled, 4-stroke, overhead valve (OHV) design, Nord helical gear reducer, oil alert system, 20 amp charge circuit,12V battery, PTO pump adapter, tachometer, temperature controlled auto-start and stop, manual override

*Depending on severity of situation.

**Weights are approximate.

Coverage & Dimensions