Blauberg Iso-Mix Silent Sub Floor Ventilation Kit 4 - Up To 200m3 | 2 x IntakesThe Blauberg Standard Sub Floor Ventilation Kit 4 is a premium, pre assembled solution designed to tackle underfloor dampness, stale air, and mould build up in residential and light commercial spaces up to 200m3. Engineered with a powerful Blauberg Iso Mix Exhaust AC Fan delivering 1315 m3 h airflow, this kit ensures robust air exchange to keep your subfloor dry and ventilated. Featuring two intake points, the system uses flexible dual layer air