Description 1) Quick Comparison: Reversible vs Backdraft Damper Choose the version that matches your ventilation goal. If you need both intake and exhaust, pick Reversible Airflow. If you only need one-way exhaust and want to reduce backflow, pick Backdraft Damper. Item Reversible Airflow Version Backdraft Damper Version Airflow direction Reversible (Intake ↔ Exhaust) Exhaust-only Backdraft damper No Yes (helps prevent backflow; helps block insects) Best for Rooms that need fresh-air intake and exhaust flexibility Bathrooms/kitchens/garages where one-way exhaust is preferred Control Remote control (version-dependent) Remote control or wall switch (version-dependent) Speed control 5-stage variable speed 5-stage variable speed Motor EC motor EC motor Noise Low-noise operation Low-noise operation Power (same size comparison) Higher power (see model table) Lower power (see model table) 2) Shared Specifications These specifications apply to both versions (Reversible Airflow and Backdraft Damper): Shared Item Specification Brand KCVENTS Installation Wall / Window mounting (wall-mounted) Application Hotel, Industrial, RV, Garage, Household Function Exhaust ventilation (with version-specific airflow direction) Housing material Plastic / ABS (ABS housing on reversible version icons) Motor type EC motor (energy-saving) Speed control 5-stage speed regulation Noise level ≤ 40 dB App control No Operating language English Warranty 3 years Origin Guangdong, China Customization Logo/graphic customization: 3D printing 3) Model Tables for Order Confirmation Use the tables below to confirm the exact model you’re selecting (size, power, airflow, and version). A) Reversible Airflow Models (Reversible Direction) Model Size (inch) Voltage EC Motor Power (W) Airflow (m³/h) Notes APC10-J-Reversible 4″ 80–245V, 50–60Hz 10W 100 Reversible airflow; 70-second automatic cycle; 5-stage speed control APC15-J-Reversible 6″ 80–245V, 50–60Hz 10W 230 Reversible airflow; 70-second automatic cycle; 5-stage speed control B) Backdraft Damper Models (Exhaust-Only Anti-Backflow) Model Size (inch) Voltage EC Motor Power (W) Airflow (m³/h) Notes APC10-J 4″ 220V 4W 90 Exhaust-only; Backdraft Damper APC15-J 6″ (not provided) 5W 180 Exhaust-only; Backdraft Damper ��️ Standard Version (e.g., APC-C-EC / Thermostatic Quiet / Wired Switch) ✅ Main Function: One-way exhaust �� Removes indoor air containing odors, humidity, smoke, or pollutants �� Expels indoor air outdoors to improve indoor air quality �� Think of it as a one-way “air transporter”: it only pushes indoor air out �� Example: After cooking, it can remove cooking fumes and smoke, but cannot bring fresh outdoor air in �� Reversible Version (e.g., APC-C-EC / Reversible Model) ✅ Main Function: Bidirectional airflow (Exhaust & Intake) �� Expels indoor polluted air like the standard version �� Can reverse to bring fresh outdoor air indoors for two-way circulation �� Example: When indoor air feels stuffy, switch to reverse mode to bring in fresh air �� Normal mode still works as standard exhaust to remove indoor waste air �� Tips for Users: Perfect for kitchens, bathrooms, or any indoor space needing air quality improvement Reversible version provides flexible ventilation, improving both air freshness and comfort �� Additional Notes: Ideal for wall or window installation Suitable for residential, commercial, or industrial ventilation Reversible model enhances indoor air circulation flexibility
