1. Introduction
The Xiaomi Mijia Graphene Smart Electric Heater (Model KRDNQ05ZM) is a high-efficiency electric heater designed to provide rapid and comfortable warmth. Utilizing advanced graphene heating technology, it offers quick heat-up times and intelligent temperature control. Its IPX4 waterproof rating makes it suitable for various environments, including bathrooms, and it features a convenient drying function. This manual provides essential information for the safe and effective use of your new heater.

Image: The Xiaomi Mijia Graphene Smart Electric Heater in a living room setting.
2. Safety Information
Please read all safety instructions carefully before using the heater to prevent injury or damage.
- Always ensure the heater is placed on a stable, level surface to prevent tipping.
- Do not cover the heater or block its air inlets/outlets, as this can lead to overheating.
- Keep flammable materials (curtains, furniture, paper, etc.) at least 1 meter (3 feet) away from the heater.
- Do not use the heater near water or in excessively damp environments, except for its intended use in bathrooms due to its IPX4 rating. Ensure the power outlet is protected.
- Unplug the heater when not in use or before cleaning.
- Do not insert objects into the heater's openings.
- 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.
Integrated Safety Features:
- Overheating Protection: The heater is equipped with a liquid expansion overheating sensor and an overheating protection switch. If the internal temperature exceeds a safe limit, the heater will automatically stop heating.
- Tip-over Protection: A dump power-off switch automatically cuts power if the heater is accidentally knocked over.
- Child Lock: A child lock design prevents accidental touches and changes to settings.
- IPX4 Waterproof: Provides protection against splashing water, making it safe for use in bathrooms.

Image: Diagram illustrating the internal overheating and tip-over protection sensors.

Image: Smartphone interface demonstrating the child lock feature.
3. Package Contents
Please check the package contents upon unboxing. If any items are missing or damaged, contact customer support.
- Electric heater body × 1
- User Manual × 1
- Foot bracket × 2
- Screw × 4
- Screwdriver × 1

Image: Visual representation of the heater's packing list.
4. Specifications
| Feature | Specification |
|---|---|
| Product Model | KRDNQ05ZM |
| Product Name | Xiaomi Mijia Graphene Smart Electric Heater |
| Brand Name | XIAOMI |
| Product Size | 780mm × 526mm × 216mm |
| Rated Frequency | 50Hz |
| Rated Input Power | 2200W |
| Rated Voltage | 220V~ |
| Protection Level | IPX4 (Splash-proof) |
| Wireless Connection | Wi-Fi IEEE 802.11b/g/n 2.4GHz |
| Heater Type | Electric Convection Heater |
| Feature | Intelligent Constant Temperature, Drying Function, Silent Frequency Conversion, Indicator Light Off Function |

Image: Dimensions of the heater (780mm width, 526mm height).
5. Setup
5.1 Assembly
- Carefully remove all components from the packaging.
- Attach the two foot brackets to the bottom of the heater body using the provided four screws and screwdriver. Ensure they are securely fastened for stability.

Image: Close-up of the stable foot bracket, designed to prevent accidental tipping.
5.2 Placement
- Place the heater on a firm, level surface.
- Ensure there is adequate clearance around the heater (at least 1 meter/3 feet) from walls, furniture, curtains, and other objects to allow for proper airflow and prevent fire hazards.
- Do not place the heater directly below a power outlet.
- For bathroom use, ensure the heater is positioned where it cannot be reached by a person in a bath or shower, and the power outlet is suitable for wet environments.
5.3 Power Connection
- Connect the power cord to a suitable 220V~ electrical outlet.
- Ensure the outlet is properly grounded and can handle the heater's 2200W power consumption.
6. Operating Instructions
The heater can be operated via its integrated control panel or through the Mijia APP and Xiaoai classmates intelligent control.
6.1 Control Panel Overview

Image: Control panel with buttons for power, temperature adjustment (18-28°C), and timing (1/3/5/9 hours).
- Power Button: Press to turn the heater On or Off.
- Temperature Adjustment: Cycle through six temperature settings from 18°C to 28°C. The heater maintains an intelligent constant temperature.
- Timing Function: Set the heater to operate for 1, 3, 5, or 9 hours.
- Indicator Light: The indicator light can be turned off for undisturbed sleep.
6.2 Smart Control (Mijia APP / Xiaoai Classmates)
For enhanced convenience, connect your heater to the Mijia APP or use Xiaoai classmates for voice control.
- Download the Mijia APP from your smartphone's app store.
- Follow the in-app instructions to add and connect your Xiaomi Mijia Graphene Smart Electric Heater.
- Once connected, you can control the heater remotely, adjust temperature, set timers, and manage other settings.
- If using Xiaoai classmates, enable the integration through the Mijia APP and use voice commands such as "Turn on the electric heater," "Electric heater adjusted to 26 degrees," or "Off indicator light."

Image: Example of using voice commands for smart control of the heater in a bedroom.
6.3 Drying Function
The integrated rack on top of the heater can be used for drying small items like towels or clothes. Ensure items do not completely cover the heater's vents to maintain proper airflow.

Image: The heater with a towel on its drying rack, indicating its drying function.
7. Maintenance
Regular cleaning and maintenance will ensure optimal performance and longevity of your heater.
- Always unplug the heater from the power outlet before cleaning or performing any maintenance.
- Allow the heater to cool down completely before touching any surfaces.
- Wipe the exterior surfaces with a soft, damp cloth. Do not use abrasive cleaners, solvents, or harsh chemicals, as these can damage the finish.
- Use a vacuum cleaner with a brush attachment to gently remove dust from the air inlets and outlets. Ensure these areas remain clear of obstructions.
- Store the heater in a cool, dry place when not in use, preferably in its original packaging.
8. Troubleshooting
If you encounter any issues with your heater, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Heater does not turn on | No power supply; Power button not pressed; Tip-over switch activated | Check if the power cord is securely plugged in. Ensure the wall outlet is functional. Press the power button. If tipped, place upright and restart. |
| Heater stops working unexpectedly | Overheating protection activated; Timer function ended | Unplug the heater and allow it to cool down for at least 30 minutes. Check for any obstructions blocking air vents. If a timer was set, it may have reached its end. Reset the timer if needed. |
| Insufficient heating | Temperature setting too low; Room size too large for heater; Air vents blocked | Increase the temperature setting. Ensure the heater is appropriate for the room size. Clear any obstructions from air vents. |
| Smart control not working | Wi-Fi connection issue; App not configured correctly | Check your home Wi-Fi network. Ensure the heater is connected to the 2.4GHz band. Reconfigure the heater in the Mijia APP if necessary. |
If the problem persists after trying these solutions, please contact customer support.
9. User Tips
Based on common user feedback for similar smart electric heaters, here are some tips to enhance your experience:
- Optimize Placement: For best results, place the heater in the area of the room where you spend the most time. Avoid placing it directly in front of open windows or doors where heat can easily escape.
- Smart Home Integration: Fully utilize the Mijia APP and voice control features. Setting up routines or schedules can help save energy and ensure your space is warm when you need it.
- Energy Saving: Use the intelligent constant temperature feature to maintain a comfortable temperature without continuously running at maximum power. The timer function is also useful for heating a room only when occupied.
- Drying Function: When using the drying rack, ensure items are not too heavy and allow for air circulation around the heater to prevent overheating. This feature is ideal for small garments or towels.
- Night Mode: Take advantage of the option to turn off the indicator light for a more comfortable sleeping environment.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the official Xiaomi Mijia website or contact your local authorized dealer. Keep your purchase receipt as proof of purchase for any warranty claims.





