What are major advantages and disadvantages of pressure or push (up-flow) aeration?
The primary advantage of pressure aeration is that it moves warm air out through roof vents so there is no chance of freezing over roof vents and roof collapse. However, all pressure or push aeration adds heat to the air from the physical process of compressing the air (heat of compression) to overcome frictional resistance to air-flow through grain. Thus, pressure aeration systems will never cool grain as cool as suction aeration.
