Fresh air valve Technical data Capacity Pa 50 40 30 20 15 10 7 5 30 10 40 15 50 1 20 30 70 100 1. ULV with wall sleeve type 1. 2. ULV with wall sleeve types 2 and 3. 2 40 l/s 150 m³/h Sound reduction ULV with wall sleeve type 3 Weighted element-normalised level difference Dn,e,w = 48 dB, Δ max = 8.6 dB Dn,e 80 78 60 50 40 30 20 63 125 250 500 1000 2000 4000 The sound insulation measurements were undertaken by DELTA & Vibration, in accordance with the testing instruc- tionsin DS/ISO 140-3:1978. lindab | we simplify construction ULV Lindab reserves the right to make changes without prior notice 3 2021-01-08
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