Ventilation Pipes Aerial and Subsurface

Custom structure that can be used as:

Underground heat exchanger
Surface geothermal system that allows preheating or refreshing air from outside a building before distributing it in the inhabited space.

Aerial ventilation
Pipe used to suck up and evacuate stale air from a building.

Hay dryer and pig farm ventilation
Pipe network used to control product humidity or mechanically evacuate odors from a farm building.

Potato warehouse ventilation
Culverts buried under a concrete slab in which openings are provided to ventilate the underside of plantations.