KDK 24CXH hidden exhaust fan, 4-inch outlet, size 24*24

Hidden ceiling exhaust fan high efficiency KDK Model number: 24CXH suction power 150 CFM gypsum opening size 24*24 4 inch outlet high efficiency (very quiet) warranty: agent two years (maintenance) - you can order accessories from here: flexible hose (Hanjur) 4-inch size - ventilation opening protection from birds and insects: circular grille 4 inch and 6 inch size available with 5 suction powers (50 - 82 - 112 - 159 - 226 - 344) features and uses of KDK hidden exhaust fan very small space fan with 50 power (4 inch outlet) 2x1.5 bathroom needs a fan with 82 power (4 inch outlet) 2x2 bathroom needs a fan with 112 power (4 inch outlet) 3x3 bathroom needs a fan with 159 power (6 inch outlet) 5x5 kitchen or bathroom needs a fan with 226 suction power (6 inch outlet) 7x5 kitchen or bathroom needs a suction fan with 344 power (6 inch outlet) warranty terms and conditions: the warranty is two years for manufacturing defects and does not include misuse or effects of electrical hazards, fire, breakage, heat, or improper installation