14" x 14" Air Flow Capture Hood for testo 420

Optional 14" x 14" capture hood for use with the testo 420 air flow capture hood, for measurements at air inlets and outlets. Includes an integrated flow straightener for high-precision measurement results, with 13" x 13" inner dimensions. To ensure that the testo 420's measurement results are correct, this capture hood should be used with a minimum 13" x 13" outlet size.