Transition box AST DN90/125 (OD90–ID75 / Ø125) 400 mm – is a compact and durable HVAC system component for efficient air distribution; the outer diameter is 90 mm and the inner diameter is 75 mm.

Transition box AST 2xDN75/125 (OD75–ID63 / Ø125) 400 mm – is a reliable HVAC component designed for efficient air distribution from DN125 into two DN75 ducts; the outer diameter is 75 mm and the inner diameter is 63 mm.

Supply and Exhaust Box AST 2xDN75/125 – 300mm – is a reliable HVAC component designed for efficient airflow distribution from DN125 to two DN75 ducts.

Supply and Exhaust Box AST 2xDN90/125 – 400mm – is a reliable HVAC component designed for efficient airflow distribution from DN125 to two DN75 ducts.