400m³/h Compact Air Purifier

Defaee 400m³/h Compact Air Purifier is a high-efficiency air cleaning device engineered for small to medium-sized spaces. Delivering a rated airflow of 400m³/h, it provides reliable air circulation and purification for areas of 30-60㎡ (with ceiling heights of 2.6-3.0m). It is widely applicable in hospital consultation rooms, laboratories, small offices, residential bedrooms, private dining rooms and similar environments.

Featuring a modular purification structure integrated with multi-stage filtration technology and an intelligent control system, this unit balances high purification performance, quiet operation and easy maintenance. It effectively removes airborne particulates, microorganisms and harmful gases, and meets the strict air cleanliness and stability requirements of professional and residential settings alike.

Core Technical Specifications

Purification System & Operating Principle

This device adopts a three-stage purification structure: Pre-filter + Composite High-efficiency Filter + Optional Additional Modules, which targets different pollutants through progressive filtration:

Pre-filter: Made of polyester fiber filter cotton, it quickly captures large particles such as hair, dust and lint. This prevents clogging of downstream filters and extends the service life of core components. The pre-filter is washable and reusable, reducing long-term operating costs.

Composite High-efficiency Filter: The core is an H13-grade HEPA filter paired with an activated carbon composite layer. The HEPA filter efficiently intercepts fine particles as small as 0.3μm, including PM2.5, pollen, mold spores and bacteria. The activated carbon layer physically adsorbs gaseous pollutants such as formaldehyde, TVOC and odors, making it highly effective for post-renovation pollution, cooking fumes and pet odors.

Optional Additional Modules: Selected models can be equipped with a UVC sterilization module or negative ion purification module. The UVC module irradiates the filter surface to kill attached bacteria and viruses, preventing secondary contamination. The negative ion module releases negative oxygen ions to settle fine particulates and enhance indoor air freshness.

The device uses a built-in fan to drive air circulation. Polluted indoor air enters through the side air inlets, passes through the three-stage filtration system, and clean air is discharged from the top outlet. With a 400m³/h airflow, it achieves 6-8 air changes per hour in a 30㎡ space, rapidly reducing indoor pollutant concentrations.

Key Product Advantages

High-Efficiency Purification for Diverse Pollution Scenarios

This unit provides comprehensive treatment for multiple pollutants across different environments:

· In healthcare settings: Filters bacteria and viral aerosols to reduce cross-infection risks

· In residential settings: Removes formaldehyde, PM2.5, pet hair and odors

· In office settings: Captures printer dust and odors from crowded spaces

Quiet & Energy-Efficient for Continuous Operation

Equipped with a DC brushless fan and optimized air duct design, it operates at ≤55dB(A) on high speed and ≤35dB(A) on low speed—virtually silent at night. With a rated power of only 120W, it consumes less than 3 kWh of electricity when running 24 hours a day, making it ideal for hospitals and laboratories requiring continuous purification.

Intelligent & Easy to Maintain

The LCD display shows real-time indoor PM2.5 concentration, temperature, humidity and filter life for intuitive air quality monitoring. It supports three-speed adjustment and 1-12 hour timer functions. The filter replacement reminder accurately indicates when to change filters, preventing efficiency degradation from overuse. The side-opening filter compartment allows tool-free filter replacement in just 1-2 minutes by a single person.

Flexible Mobility for Multi-Scene Use

Four silent universal casters enable easy movement between consultation rooms, offices, bedrooms and meeting rooms, allowing one unit to serve multiple spaces temporarily. Its compact vertical design occupies less than 0.2㎡ of floor space, fitting seamlessly into various small to medium-sized areas.

Safe & Reliable for Professional Applications

The body is made of ABS flame-retardant plastic or powder-coated cold-rolled steel, offering corrosion and scratch resistance suitable for hospitals and laboratories. The electrical system features overcurrent and overheating protection for stable and safe operation. Selected models are available with medical-grade disinfection certification to meet regulatory requirements in healthcare facilities.

Applicable Scenarios

· Healthcare: Hospital consultation rooms, infusion rooms, nurse stations and small laboratories

· Office: Small offices, meeting rooms and open work areas

· Residential: Bedrooms, living rooms, children's rooms and studies

· Commercial: Private dining rooms, small retail stores, gyms and beauty salons

· Research/Laboratory: Small laboratories and specimen storage rooms

Operation & Maintenance Instructions

Installation & Placement

No professional installation is required. Simply place the unit on a flat surface after unboxing. Maintain a minimum distance of 20cm from walls to ensure unobstructed airflow through inlets and outlets. Avoid placing the device in humid, high-temperature or direct sunlight areas to prevent damage and filter mold growth.

Daily Operation

Connect to power and press the power button to turn on. The device defaults to auto mode, adjusting fan speed based on real-time air quality. Manual speed adjustment (low/medium/high) and 1-12 hour timer functions are available via touch buttons. Optional modules (UVC, negative ions) can be toggled on/off using dedicated buttons.

Filter Maintenance & Replacement

· Pre-filter: Remove and rinse with clean water every 1-2 weeks, then air dry completely before reinstallation. Do not rub vigorously to avoid deformation.

· HEPA Composite Filter: Replace every 6-12 months (adjust based on pollution levels). Replace immediately when the filter replacement reminder appears or purification performance noticeably declines to prevent secondary contamination.

· Replacement Procedure: Turn off the power, open the filter compartment cover, remove the old filter, clean dust from the compartment, and install the new filter securely to prevent air leakage.

Daily Cleaning & Storage

Wipe the body surface regularly with a dry cloth. Do not use alcohol or corrosive disinfectants. Clean inlet and outlet grilles with a soft brush to remove dust buildup. For long-term storage, turn off the power, remove the filters, and store the device in a dry, well-ventilated area.

Market Value

This 400m³/h compact air purifier addresses the core pain points of small to medium-sized space air purification. Compared to large commercial purifiers, it is more compact, mobile, cost-effective and requires no professional installation. Compared to basic residential purifiers, it offers higher airflow and filtration efficiency, meeting the stricter requirements of professional settings.

In a market where indoor air quality is increasingly valued, this device provides a cost-effective solution for healt