4" Indoor Fan Vent kit, Indoor Ventilation Fan and 4"x16ft Dryer Vent Hose with 2 Screw Clamps and Wall Vent Cover for HVAC Ventilation

4" Indoor Fan Vent kit, Indoor Ventilation Fan and Dryer Vent Hose with 2 Screw Clamps and Wall Vent Cover for HVAC Ventilation

• 【Ventilation Fan with Check Valve】 This 4” exhaust fan' air duct vent has check valve. You can keep air reversible or exhausting cooking odors by your request. When the airflow stops, it can be closed by spring automatically. And if you don’t need the check valve, you can take it off easily.
• 【Flexible HVAC Ducting 】The vent hose is 4 inches (diameter) x 16 feet (length) when fully extended. made of extra strength 4-layers - aluminum foil + PET + aluminum foil and outer black layer (PVC) ensure working on -22 to 266℉ environment.
• 【2 hose clamps are included】The hose clamps is made of high quality 304 stainless steel, rust-proof, water-proof, strong, durable and long lasting use. Adopts an open inner and outer ring structure and fastened with bolts.
• 【Stainless Steel Wall Vent】The stainless steel vent cover is built-in with a screen.Helps keep wind, rain and snow from entering outdoor dryer vents, also keeps out birds and rodents
• Variety of Applications: The vent kit is suitable for HVAC system. It will move and deliver air in kitchens (cooking exhaust), green houses and grow rooms (air circulation, intake, exhaust and light fixture cooling), bathrooms (smell and moisture exhaust), dryer rooms, grow tents and other applications etc.