90mm semi-rigid ducting in webbed joists and passing through core-drilled blockwork wall for MVHR system – Heat, Space and Light Ltd 2021

90mm semi-rigid ducting in webbed joists and passing through core-drilled blockwork wall for MVHR system

90mm semi-rigid ducting in webbed joists and passing through core-drilled blockwork wall

90mm semi-rigid ducting in webbed joists and passing through core-drilled blockwork wall for MVHR system

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