1. Product Overview
The Bosch Silent Bathroom Extractor Fan 1900 DH W100 is an advanced ventilation solution designed to maintain a healthy and comfortable environment in your bathroom or WC. This fan effectively reduces humidity, prevents mold growth, and eliminates unpleasant odors. Its key features include exceptionally quiet operation, an intelligent humidity sensor, and an adjustable timer for optimized performance.
Figure 1: Front view of the Bosch 1900 DH W100 Silent Bathroom Extractor Fan.
2. Safety Information
Please read all safety instructions carefully before installation and operation. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Electrical Safety: This appliance operates on 230 Volts. All electrical work must be performed by a qualified electrician in accordance with local wiring regulations and standards. Ensure the power supply is disconnected before any installation or maintenance.
- Installation Environment: Do not install the fan in areas where flammable or explosive gases are present. Ensure adequate ventilation during installation.
- Water Proximity: This fan is designed for bathroom use but must be installed in a zone where it is not directly exposed to water spray from showers or baths, as per electrical safety regulations for wet areas.
- Children and Vulnerable Persons: This appliance is not intended for use by persons (including children) with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not play with the appliance.
- Maintenance: Only perform maintenance tasks described in this manual. For repairs or complex issues, contact qualified service personnel.
3. Package Contents
Verify that all components are present and undamaged upon unpacking:
- 1 x Bosch 1900 DH W100 Silent Bathroom Extractor Fan Unit
- 1 x Power Cord (integrated or separate, depending on region)
- 1 x Instruction Manual (this document)
- Mounting hardware (screws, wall plugs)
4. Product Features
The Bosch 1900 DH W100 fan incorporates several features for optimal bathroom ventilation:
- Silent Operation: Engineered for a low noise level of 28 dB(A), ensuring minimal disturbance. Note that in tiled bathrooms, sound reflections may make the fan seem louder.
- Integrated Humidity Sensor: Automatically activates the fan when the humidity level in the room exceeds a preset threshold (adjustable between 40% and 90%).
- Adjustable Timer: Allows you to set the fan's run-on time after activation, ranging from 3 to 30 minutes, ensuring thorough ventilation.
- Efficient Airflow: Provides an airflow rate of 75.4 m³/h, effectively removing moist air and odors.
- Integrated Non-Return Valve: Prevents backdraft of external air into the room when the fan is not operating, maintaining indoor air quality.
- Elegant Design: Features a timeless and discreet design that seamlessly integrates into various bathroom aesthetics.
- Versatile Installation: Suitable for both wall and ceiling mounting.
Figure 2: The fan's discreet presence in a bathroom, emphasizing its quiet operation.
5. Installation
The Bosch 1900 DH W100 is designed for straightforward installation, suitable for both wall and ceiling mounting. However, due to electrical connections, it is highly recommended that installation be carried out by a qualified electrician.
5.1. Pre-Installation Checks
- Ensure the power supply to the installation area is completely switched off at the main circuit breaker.
- Confirm the required duct diameter is 100 mm. A 102 mm hole is needed for proper fitting.
- Choose a suitable location for the fan, considering airflow, electrical connections, and compliance with local building codes for bathroom ventilation.
5.2. Mounting Steps
- Prepare the Opening: Create a circular opening of 102 mm diameter in the wall or ceiling at the chosen installation point. Ensure the opening is clean and free of debris.
- Electrical Connection: Remove the front cover of the fan to access the wiring terminal. Connect the electrical wires (Live, Neutral, Switched Live if applicable for timer/humidity sensor) according to the wiring diagram provided inside the fan unit. Ensure all connections are secure and insulated.
- Secure the Fan: Insert the fan body into the prepared opening. Use the provided mounting screws and wall plugs to securely fasten the fan to the wall or ceiling. Ensure the fan is level and firmly attached.
- Replace Cover: Once the fan is securely mounted and wired, reattach the front cover.
Figure 3: Rear view of the fan, illustrating mounting points and internal structure.
Figure 4: Simplified installation diagram for wall or ceiling mounting.
6. Operation
The Bosch 1900 DH W100 fan operates automatically based on its integrated humidity sensor and adjustable timer.
6.1. Automatic Activation
The fan will automatically turn on when the humidity level in the room rises above the set threshold. This is particularly useful during and after showers or baths to quickly remove moisture from the air.
6.2. Humidity Sensor Adjustment
The humidity sensor sensitivity can be adjusted to suit your specific needs and bathroom conditions. Typically, there is a small dial or screw located behind the front cover of the fan. Use a small screwdriver to carefully adjust the setting. The range is usually between 40% and 90% relative humidity. A lower setting means the fan will activate at lower humidity levels.
6.3. Timer Adjustment
The run-on timer determines how long the fan continues to operate after the humidity level drops below the threshold or after a connected light switch (if wired for it) is turned off. This timer is also typically adjusted via a dial or screw behind the front cover, with a range of 3 to 30 minutes. Set it to ensure adequate ventilation after use.
Figure 5: The fan operating in a typical bathroom setting, ensuring fresh air.
7. Maintenance
Regular maintenance ensures the longevity and efficient operation of your Bosch 1900 DH W100 fan.
7.1. Cleaning the Fan
- Disconnect Power: Always ensure the power supply to the fan is disconnected at the main circuit breaker before cleaning.
- Remove Front Cover: Carefully unclip or unscrew the front cover of the fan.
- Clean Grille and Blades: Use a soft, damp cloth to wipe down the front grille and the fan blades. For stubborn dirt, a mild detergent can be used. Avoid abrasive cleaners or solvents.
- Clean Interior: Gently wipe the interior surfaces of the fan housing. Ensure no moisture enters the electrical components.
- Reassemble: Once all parts are clean and dry, reattach the front cover securely. Restore power to the fan.
It is recommended to clean the fan every 3-6 months, or more frequently in high-use environments.
8. Troubleshooting
If you encounter issues with your Bosch 1900 DH W100 fan, refer to the table below for common problems and their solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Fan does not turn on. | No power supply; Humidity level below threshold; Faulty wiring. | Check circuit breaker; Increase humidity sensor sensitivity; Consult an electrician to check wiring. |
| Fan does not turn off. | Humidity level consistently high; Timer set too long; Faulty humidity sensor/timer. | Decrease humidity sensor sensitivity; Shorten timer duration; If problem persists, contact support. |
| Fan is too noisy. | Obstruction in duct; Loose mounting; Sound reflection in tiled room. | Check duct for blockages; Ensure fan is securely mounted; Note that tiled bathrooms can amplify sound. |
| Poor airflow. | Blocked grille/duct; Fan blades dirty. | Clean fan grille and blades; Check duct for obstructions. |
If the problem persists after attempting these solutions, please contact Bosch Thermotechnik customer support or a qualified service technician.
9. Specifications
| Attribute | Value |
|---|---|
| Brand | Bosch Thermotechnik |
| Model Name | 1900 DH W100 |
| Model Number | 7733703550 |
| Product Dimensions (L x W x H) | 20.4 x 13.8 x 20.1 cm |
| Weight | 600 grams |
| Wattage | 9 watts |
| Voltage | 230 Volts |
| Noise Level | 28 dB(A) |
| Airflow Rate | 75.4 m³/h |
| Duct Diameter | 100 mm (requires 102mm hole) |
| Special Features | Humidity sensor with adjustable timer, Integrated non-return valve |
| Installation Type | Wall or Ceiling Mount |
10. Warranty and Support
For detailed warranty information, including terms, conditions, and registration, please refer to the warranty card included with your product or visit the official Bosch Thermotechnik website. Keep your proof of purchase for warranty claims.
For technical support, spare parts, or service inquiries, please contact Bosch Thermotechnik customer service. Contact details can typically be found on the official website or in your purchase documentation.
Online Resources: www.bosch-thermotechnology.com
