1. Introduction and Overview
The VIVOHOME Smart Vent Register Booster Fan is designed to improve airflow and enhance temperature regulation within your home or office. It efficiently distributes heated or cooled air, creating a more balanced and comfortable environment. This fan is designed to fit standard 4" x 12" vent openings, accommodating widths between 4"-5.2" and lengths between 9.7"-12.7".

Figure 1: The VIVOHOME Smart Vent Register Booster Fan, designed to enhance airflow and temperature control in your home.
2. Product Features
- Effective Temperature Control: Integrates with your HVAC system to improve airflow and indoor temperature regulation. It helps distribute air more efficiently, creating a balanced and comfortable environment.
- Powerful and Quiet Motor: Equipped with a 5.5W PWM-controlled DC motor with dual ball bearings, ensuring precise speed control, energy efficiency, and long-lasting performance. It provides 120 CFM airflow with less than 18 dB of noise, ideal for quiet environments.
- Smart Programming: Features a programmable LCD controller and a high-precision temperature probe to monitor duct temperature. It automatically adjusts based on your set cooling or heating preferences. Includes screen lock and memory backup to prevent accidental adjustments or data loss.
- 10 Adjustable Speeds with Remote Control: Offers 10-speed settings for customizable airflow. The included remote control allows for effortless adjustments of fan speed and temperature from up to 16.4 feet away.
- Easy Installation and Durable Design: Constructed with a premium alloy aluminum frame, ABS rear cover, and CNC-machined corners for a sleek and elegant look. Its compact design allows for floor or wall mounting (ceiling installation is not recommended).

Figure 2: The fan features a sleek design with an alloy aluminum frame and ABS rear cover, integrating seamlessly with various interior styles.

Figure 3: Designed for quiet operation, the fan produces less than 18 dB of noise, ensuring a peaceful environment.
3. Package Contents
- VIVOHOME Smart Vent Register Booster Fan Unit
- Remote Control
- Power Adapter
- Mounting Screws (if applicable for your installation type)
- User Manual
4. Setup and Installation
Follow these steps to properly install your VIVOHOME Smart Vent Register Booster Fan:
- Measure Your Vent Opening: Ensure your vent opening is between 4"-5.2" wide and 9.7"-12.7" long to ensure a proper fit. Refer to the specifications diagram for detailed measurements.
- Remove Existing Vent: Carefully remove your current floor or wall register.
- Place Booster Fan: Insert the VIVOHOME booster fan into the vent opening. Ensure it sits flush with the surface.
- Secure the Fan: Use the provided mounting screws to secure the fan to the floor or wall.
- Connect Power: Plug the power adapter into the fan unit and then into a standard electrical outlet. Ensure the power cord is not obstructed or under pressure.

Figure 4: Detailed dimensions for the fan unit and package, including vent opening compatibility.

Figure 5: The fan can be easily installed on the floor or wall, fitting vent openings with a width range of 4"-5.2" and length range of 9.7"-12.7".
Video 1: This video demonstrates the installation process and remote control functionality of the VIVOHOME Register Booster Fan.
5. Operating Instructions
5.1. LCD Controller
The fan features an intuitive LCD display and control buttons on the unit itself:
- Mode Button (☰): Press to cycle through different operating modes (e.g., fan speed, cooling trigger, heating trigger).
- Up (▲) / Down (▼) Buttons: Use to adjust temperature settings, fan speed levels (1-10), or other parameters within the selected mode.
- Screen Sleep Mode: The backlight can be turned off at night to avoid disturbance while the fan continues to operate.
- Screen Lock: Prevents accidental adjustments.
- Memory Backup: Retains your settings in case of power loss.
5.2. Remote Control
The remote control provides convenient access to all fan functions from a distance of up to 16.4 feet:
- Power Button (⏻): Turns the fan unit on or off.
- Fan Speed Buttons (⇡/⇣): Adjusts the fan speed from level 1 to 10.
- Cooling Trigger (❄️): Sets the temperature threshold for cooling mode. The fan will activate when the duct temperature exceeds this setting.
- Heating Trigger (🔥): Sets the temperature threshold for heating mode. The fan will activate when the duct temperature falls below this setting.
- Temperature Unit (°C/°F): Toggles the temperature display between Celsius and Fahrenheit.

Figure 6: The programmable LCD controller and high-precision temperature probe monitor duct temperature and automatically adjust settings for optimal comfort.

Figure 7: The included remote control allows for effortless adjustment of fan speed and temperature from up to 16.4 feet away.
Video 2: This video demonstrates the process of connecting your VIVOHOME Smart Register Booster Fan to your smartphone via the VIVOSUN app for remote control and advanced settings.
Video 3: A brief preview showcasing the VIVOHOME Register Booster Fan and its remote control features.
6. Maintenance
To ensure optimal performance and longevity of your booster fan, regular maintenance is recommended:
- Cleaning: Periodically clean the fan grilles and blades to prevent dust buildup, which can impede airflow and reduce efficiency. Use a soft, dry cloth or a vacuum cleaner with a brush attachment.
- Inspection: Check the power cord and connections for any signs of wear or damage.
7. Troubleshooting
If you encounter issues with your VIVOHOME Smart Vent Register Booster Fan, refer to the following common solutions:
- Fan Not Turning On: Ensure the power adapter is securely plugged into both the fan unit and a working electrical outlet. Check if the remote control battery needs replacement.
- Incorrect Temperature Readings: Verify that the temperature probe is correctly positioned and not obstructed. Ensure the fan is set to the appropriate heating or cooling trigger temperature.
- Excessive Noise: While designed for quiet operation, ensure the fan is securely installed and not vibrating against the vent opening or surrounding surfaces. Clean any dust buildup on the fan blades.
- Remote Control Not Responding: Check the remote control battery. Ensure there are no obstructions between the remote and the fan's sensor.
- Fan Beeping Continuously: Some users have reported intermittent beeping. Refer to the detailed user manual for specific error codes or advanced troubleshooting steps related to alerts.
8. Specifications
| Feature | Specification |
|---|---|
| Brand | VIVOHOME |
| Model Name | Register Booster Fan |
| Item Model Number | VH1651 |
| Size | 4"x12" |
| Product Dimensions | 2.1"D x 13.8"W x 5.5"H |
| Air Flow Capacity | 120 Cubic Feet Per Minute (CFM) |
| Noise Level | 18 Decibels |
| Wattage | 5.5 watts |
| Voltage | 110 Volts |
| Power Source | Corded Electric |
| Special Feature | Remote Controlled, Intelligent Thermostat |
| Number of Power Levels | 10 |
| Installation Type | Wall/Floor Mount |
9. Warranty and Support
For warranty information, technical support, or any inquiries regarding your VIVOHOME Smart Vent Register Booster Fan, please contact VIVOHOME customer service directly. Refer to the contact details provided in your product packaging or on the official VIVOHOME website.