T174 CorTen steel grille
Loose grille, associated with ventilation wells T174-A and T174-B.
Cor-Ten steel is primarily chosen for aesthetic reasons, as it develops an attractive reddish-brown discoloration due to weather conditions. This is a natural rusting process that is inherent to this product.
Note; the rust on the steel can stain adjacent surfaces, such as sidewalks. The material is also not resistant to wet leaves or other vegetation; their presence on the steel slows down the wetting and drying cycles. This accelerates corrosion. Be aware of this when choosing this product.
Compose your own ventilation well set as desired; choose the desired grille, the desired ventilation well, and optionally add a wall tube.