XFDD2-500-02JP and XFDD2-400-01JP Ceiling-Mounted Fresh Air Ventilator
The Legom XFDD2 Ceiling-Mounted Fresh Air Ventilator series delivers continuous purified fresh air for studies, bedrooms, and offices using ionization dust-removal technology with zero consumables. Available in two variants — the XFDD2-400-01JP (mesh filter type, 400m³/h, PM2.5 efficiency ≥99%) and the XFDD2-500-01JP (electric field type, 500m³/h, PM2.5 efficiency ≥97%) — both models share identical dimensions of 1097 × 600 × 240mm, the same 237W power consumption, and a common electrostatic voltage range of 4000–8000VAC.
Both variants address the four core indoor air quality priorities simultaneously: CO2 dilution through continuous fresh air supply, PM2.5 and particulate removal through high-voltage ionization, airborne virus and bacteria sterilization, and formaldehyde elimination in newly renovated spaces. The low-resistance design minimizes impact on the air conditioning fan, enabling integration into existing HVAC duct systems without requiring fan upgrades. With zero consumable media, maintenance is limited to simple periodic cleaning of the ionization module.
Key Benefits
- Two variants for different efficiency and volume priorities – XFDD2-400-01JP delivers ≥99% PM2.5 efficiency at 400m³/h for spaces where maximum purification is the priority; XFDD2-500-01JP delivers ≥97% efficiency at 500m³/h for spaces where higher air volume is the primary requirement
- Ionization dust-removal with 4000–8000VAC electrostatic field – High-voltage electrostatic ionization charges and captures PM2.5, dust, pollen, bacteria, viruses, and fine particles in the air stream without requiring replaceable filter media
- Zero consumables – No filter media to purchase or replace. Simple periodic cleaning of the ionization module restores full purification performance, eliminating ongoing consumable costs and supply chain dependency
- Formaldehyde and harmful gas elimination – Effectively removes formaldehyde and other harmful gases released by new furniture, paint, and building materials during the off-gassing period in newly decorated spaces
- Mold prevention – Continuous fresh air supply and ionization treatment reduce indoor humidity and airborne spore concentration, effectively preventing mold growth on furniture, clothing, and interior surfaces
- External noise isolation – Fresh air delivery without opening windows isolates the indoor environment from outdoor traffic noise, construction noise, and other external sound sources
- Low resistance for HVAC fan compatibility – The overall resistance of the ionization system is low, minimizing back-pressure on existing air conditioning fans and enabling integration without fan replacements or upgrades
- Ceiling-mounted installation – No floor space consumed; both models install from the ceiling with 2×φ150mm duct connections for supply and exhaust air routing
- OEM and ODM customization available – Contact Legom for customized specifications or branding requirements
Technical Specifications
Model Comparison
| Parameter | XFDD2-400-01JP | XFDD2-500-01JP |
|---|---|---|
| Type | Mesh filter type | Electric field type |
| Air Volume | 400 m³/h | 500 m³/h |
| PM2.5 Efficiency | ≥ 99% | ≥ 97% |
| Power | 237W | 237W |
| Rated Voltage | 220VAC / 50Hz | 220VAC / 50Hz |
| Electrostatic Voltage | 4000VAC – 8000VAC | 4000VAC – 8000VAC |
| Noise | ≤ 46 dB(A) | ≤ 48 dB(A) |
| Weight | 11 kg | 17 kg |
| Duct Diameter | 2 × φ150mm | 2 × φ150mm |
| Dimensions | 1097 × 600 × 240mm | 1097 × 600 × 240mm |
Legom Fresh Air Product Range Overview
| Model | Air Volume | PM2.5 Efficiency | Heat Recovery | Consumables | Best For |
|---|---|---|---|---|---|
| XFQT-60-01S | 60 m³/h | Ion catalytic | No | None | Single residential room |
| XFDD2-400-01JP | 400 m³/h | ≥ 99% | No | None | Study, bedroom, office — max purity |
| XFDD2-500-01JP | 500 m³/h | ≥ 97% | No | None | Study, bedroom, office — max volume |
| XFDD2-650-01J | 650 m³/h | HEPA grade | No | HEPA filter | Campus, classroom, commercial |
| XFDD3-360-01JP | 360 m³/h | ≥ 98% | 65% / 57% | None | Energy recovery priority |
Application & Use Cases
- Home studies and work-from-home offices – Continuous CO2 dilution at 400–500m³/h maintains oxygen levels and cognitive performance during extended periods of concentration and screen work in enclosed rooms
- Bedrooms for overnight fresh air supply – Both models operate at ≤46–48dB(A), within the range acceptable for sleeping environments, providing overnight CO2 dilution and pollutant removal without opening windows or admitting outdoor noise
- Newly renovated and decorated spaces – Formaldehyde and VOC off-gassing from new paint, flooring, and furniture is effectively removed by the ionization system during the high-emission period immediately after renovation completion
- Spaces requiring mold prevention – Continuous air circulation and ionization reduce indoor surface mold risk on furniture, clothing, and stored items in humid or poorly ventilated spaces
- Offices with existing HVAC systems – The low-resistance ionization module integrates into existing duct networks without overloading air conditioning fans, adding purification to existing ventilation infrastructure
- Environments requiring external noise isolation – Ventilating without opening windows eliminates the trade-off between fresh air and acoustic comfort in urban or high-traffic locations
Installation Notes
- Both models are ceiling-mounted and must be suspended from the ceiling structure with appropriate hangers or brackets. Verify ceiling structural capacity before installation — XFDD2-400-01JP weighs 11kg, XFDD2-500-01JP weighs 17kg
- Two φ150mm duct connections are required: one for fresh air supply from outdoors and one for exhaust air discharge. Plan duct routing before selecting the installation position
- Wall drilling is required for outdoor air intake and exhaust penetrations. Follow local building regulations for wall penetrations and ventilation system installations
- Connect to a 220VAC / 50Hz power supply with an independent circuit breaker at the ceiling installation point
- The high-voltage electrostatic system (4000–8000VAC) operates internally within the sealed unit. Ensure the housing is intact and properly grounded before energizing
- Maintenance is limited to periodic cleaning of the ionization module — no filter media replacement is required. Cleaning frequency depends on local air quality and operating hours
- Allow adequate service clearance around the unit for access to the ionization module during cleaning
Frequently Asked Questions
Which model should I choose — XFDD2-400-01JP or XFDD2-500-01JP?
Both models use the same electrostatic ionization technology, have identical dimensions and power consumption, and share the same installation requirements. The choice comes down to two trade-offs: efficiency vs volume, and weight. The XFDD2-400-01JP achieves ≥99% PM2.5 efficiency at 400m³/h and weighs only 11kg — choose this model when maximum purification efficiency is the priority, for example in bedrooms with high PM2.5 sensitivity or spaces with very high pollutant loads. The XFDD2-500-01JP delivers ≥97% efficiency at 500m³/h and weighs 17kg — choose this model when higher air volume and faster CO2 dilution in larger spaces are the priority, accepting a modest reduction in peak PM2.5 capture efficiency.
What does zero consumables mean for maintenance?
The ionization dust-removal module captures particles through electrostatic attraction rather than by trapping them in a filter medium. Over time, captured particles accumulate on the ionization collector plates. Maintenance consists of removing and washing the collector plates with water — a simple cleaning process that restores full purification performance without purchasing replacement parts. No filter cartridges, filter bags, or other consumable media are required at any point during the unit’s service life.
How do these models compare to the XFDD3-360-01JP total heat exchanger?
The XFDD2-400-01JP and XFDD2-500-01JP focus on high-volume fresh air supply and purification without heat exchange. The XFDD3-360-01JP adds total heat recovery (65% heating / 57% cooling) which reduces the energy cost of conditioning incoming fresh air — at the expense of lower air volume (360m³/h). Choose the XFDD2 series when fresh air volume and purification are the primary requirements and energy recovery is secondary. Choose the XFDD3-360-01JP when recovering energy from exhaust air is an important design objective and the 360m³/h volume is sufficient for the space.
Can these units be integrated with an existing air conditioning system?
Yes. The low-resistance ionization module design minimizes back-pressure impact on existing air conditioning fans, allowing the unit to be connected into existing duct systems without requiring fan replacements or motor upgrades. Contact the Legom team to verify compatibility with your specific duct system configuration and fan specifications before installation.
What room size is each model suited for?
The XFDD2-400-01JP at 400m³/h can provide approximately 4 to 5 air changes per hour in a room of 80–100m² with a standard 2.5–3m ceiling height. The XFDD2-500-01JP at 500m³/h provides the same frequency in a room of 100–130m². For spaces requiring more than 500m³/h, consider the XFDD2-650-01J campus ventilator or multiple units. Contact Legom for project-specific sizing guidance.
OEM & ODM Customization
Legom supports OEM and ODM services for the XFDD2 Ceiling-Mounted Fresh Air Ventilator series. Our engineering team can customize specifications, branding, and system integration configurations to match your project requirements. All customization projects are handled with strict confidentiality. Contact us via WhatsApp or info@legomsmart.com.
User Manual
Product information last reviewed by the Legom Technical Team. For the most current specifications, refer to the official datasheet or contact our sales team.
Custom OEM & ODM Solutions
Legom is a direct manufacturer offering end-to-end OEM and ODM services. With our in-house engineering and production capabilities, we work closely with distributors and system integrators to deliver fully customized solutions under strict NDA.
