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The Testo 420 replacement hood (610 × 1220mm) is designed for accurate volume flow measurement at large commercial diffusers and grilles. With an integrated flow straightener, it calms turbulent airflow before measurement — delivering high-precision volume flow results at outlets where standard square hoods fall short.
This hood mounts directly onto your existing Testo 420 volume flow hood base and comes with a carry bag. Not sure which hood size suits your diffusers? See our TAB commissioning guide or browse the full flow hood range at HVAC Shop AU.
Ships within 48 hours · Estimated delivery Jun 21 - Jun 26
US$40
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