Stainless steel mesh ventilation grill 411R

roundexterioroutdoor

Product description
The 411R is a round built-in wall louvre designed for discreet installation in wall openings. It mounts invisibly using clip springs or wall anchors and is suitable for ventilation and façade integration where minimal visual impact is required.

Product advantages

• Includes 304 stainless steel insect screen
• Quick and easy installation with clip springs or wall anchors
• Sleek, minimal visible profile
• Round, built-in configuration for flush mounting

Options

• Mosquito net 304 - 2,3 x 2,3 mm
• No mesh
• Mosquito net 304 - 6 x 6 mm
• Mosquito net 304 - 10 x 10 mm
• Mosquito net 304 - 20 x 20 mm
• Without water gutter (option)

Available documents

• Brochures B2B (Louvres)
• DWG files (cad-411.zip)
• Technical drawing (cad-411.zip)
• Technical sheet (Datasheet-411R-EN.pdf)
• Certificate air passage (MR056-411R-431RC2-insectmesh-Airflow-BSRIA-E-28-02-2011.pdf)
• Certificate IP classification (IPT_MR210_411-414-431_en.zip)
• Warranty certificate (WC_Renson_Louvres_en.pdf)
• Colour guide 2026 (CG_Indoor_Colour_Guide_en_2026.pdf)

Technical specifications

• Physical Free Passage (%): 40.50
• Slat step (mm): 33.3
• Standard mesh type: -
• IP class: IP2XD
• Depth to fit (mm): 28
• Total louvre depth (mm): 30
• K-factor (entry): 23.6
• CE coefficient: 0.206
• K-factor (discharge): 25.5
• CD coefficient: 0.198
• Water resistance at 0 m/s (%): 95.3
• Water resistance at 0.5 m/s (%): 91
• Water resistance at 1.0 m/s (%): 80.5
• Water resistance at 1.5 m/s (%): 46.6
• Water resistance at 2.0 m/s (%): 22
• Water resistance at 2.5 m/s (%): 7.4
• Water resistance at 3.0 m/s (%): 7.3
• Water resistance at 3.5 m/s (%): 7.5