Best Humidifiers — 800ml (2026)
1 humidifiers matching capacity “800ml”, hand-picked from UK Amazon listings.
Not sure which one to pick? Read our Best Humidifiers UK (2026) guide.
The 800ml Humidifier offers a targeted approach to boosting humidity levels in smaller spaces like bedrooms or offices. This capacity is ideal for maintaining consistent moisture, which can be particularly beneficial during drier months or when using heating systems that naturally reduce indoor humidity. Designed with ease of use in mind, these humidifiers typically feature adjustable mist settings and quiet operation, making them a discreet addition to any room.
These 800ml models are often favoured for their relatively compact size, allowing them to blend seamlessly into various décor styles. They generally include features like an auto shut-off function for added safety and ease of use. The consistent humidity output can help alleviate dry skin, soothe coughs, and improve overall air quality.
When considering a humidifier, the 800ml capacity is well-suited for rooms up to approximately 200 square feet. However, it's important to monitor your room’s specific needs and adjust settings accordingly. Regular cleaning of the unit is also crucial for optimal performance and hygiene.
#1 Pick
PureAire Cool Mist Humidifier for Bedroom & Home Office, Colour LED Ultrasonic Air Diffuser with High Capacity 800ml Water Tank & USB - Black- 800ml
£10.23
Pros
- Very affordable entry point into ultrasonic humidifiers
- Colour-changing LED doubles as a mood light
- USB powered for use at a desk or bedside
Cons
- 800ml tank needs refilling more often than larger units
FAQ
What type of water should I use in my 800ml humidifier?+
Distilled or demineralized water is highly recommended to prevent mineral buildup and ensure consistent mist output. Tap water contains minerals that can clog the unit and reduce its effectiveness.
How often should I clean my 800ml humidifier?+
Clean your humidifier thoroughly every 1-3 days, depending on usage. A build-up of mineral deposits and bacteria can negatively impact air quality and promote mould growth.
Can I use tap water in my 800ml humidifier occasionally?+
While possible, prolonged use of tap water isn't advised due to the minerals it contains. This will lead to scale buildup which reduces performance and could be harmful to your health.
What if my 800ml humidifier shuts off automatically?+
This is a safety feature triggered by low water levels. Refill the tank immediately to restore operation. It’s also possible the unit has reached its maximum capacity.
Does the humidity output of an 800ml humidifier vary?+
Yes, humidity output can fluctuate based on factors such as room temperature and airflow. Maintaining a consistent distance between the humidifier and furniture is key for optimal performance.
How does the 800ml capacity compare to other humidifiers?+
An 800ml tank typically provides around 20-30 hours of continuous operation at a low setting, making it suitable for smaller rooms or overnight use. Larger tanks offer extended runtime but require more frequent refilling.
Are there any specific maintenance tips I should follow?+
Regularly inspect the nozzle and water tank for blockages. Use a soft brush to clean these components gently. Avoid using harsh chemicals or abrasive cleaners.
Will an 800ml humidifier help with allergies?+
While it won’t eliminate allergies, increasing humidity can soothe irritated nasal passages and potentially reduce the spread of allergens by keeping surfaces moist.
What is the noise level like for an 800ml humidifier?+
Most models are designed to operate quietly, typically around 30-45 decibels. However, it's always best to check specific product specifications before purchasing.
Can I use essential oils with my 800ml humidifier?+
Only use diffusers specifically made for humidifiers and follow the manufacturer’s instructions carefully. Adding essential oils to a standard humidifier can damage the unit.