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With a gravity flap – no need for springs that break! Round rigid ducting provides superior airflow performance vs comparative size rectangular or flexible duct. Pressure Drop in Pascals: 15 l/s = 25.0 Pa – 30 l/s = 44.90 Pa – 60 l/s = 101.60 Pa.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.