XFDD3-360-01JP Full Heat Exchanger
The Legom XFDD3-360-01JP Total Heat Exchanger is a full-function fresh air and energy recovery ventilation unit combining ionization-coupling purification with high-efficiency total heat exchange for bedrooms, school classrooms, and office environments. Delivering 360m³/h of purified fresh air with a PM2.5 filtration efficiency of ≥98%, the XFDD3-360-01JP simultaneously recovers 65% of heating energy and 57% of cooling energy from exhaust air — significantly reducing the energy load on the building’s HVAC system while maintaining continuous fresh air supply.
Unlike single-function fresh air units or purifiers, the XFDD3-360-01JP is a total heat exchanger: it transfers both temperature and humidity between the incoming fresh air stream and the outgoing exhaust air stream through a dedicated heat exchange core, stabilizing indoor temperature and humidity levels without the energy loss associated with conventional ventilation. With zero consumables, no secondary pollution risk, two-way ventilation that prevents cross-contamination between indoor and outdoor air, and an electrostatic purification voltage of 4000–8000VAC, this is Legom’s most technically comprehensive indoor air quality product.
Key Benefits
- ≥98% PM2.5 filtration efficiency – The highest filtration efficiency in the Legom air purification range, achieved through ionization-coupling purification with electrostatic voltage of 4000–8000VAC that charges and captures fine particles including PM2.5, dust, smoke, and pollen
- Total heat exchange — temperature and humidity recovery – Unlike sensible-heat-only exchangers, the total heat exchanger transfers both temperature and moisture between exhaust and supply air streams, maintaining indoor humidity within the comfort range during winter and summer without additional humidification or dehumidification load
- 65% heating energy recovery / 57% cooling energy recovery – Recovers a majority of the thermal energy in exhaust air before it leaves the building, directly reducing boiler, heat pump, or chiller energy consumption required to condition incoming fresh air
- Two-way ventilation with cross-contamination prevention – Dedicated supply and exhaust air paths are physically separated within the unit, preventing exhaust air pollutants from re-entering the supply air stream
- Zero consumables and no secondary pollution – Ionization-coupling purification does not rely on replaceable filter media. The system generates no secondary waste streams and does not introduce chemicals into the air, supporting long-term low-maintenance operation
- Ionization-coupling sterilization – Electrostatic ionization at 4000–8000VAC removes particulate matter, eliminates odors, and sterilizes airborne bacteria and viruses in the supply air stream
- CO2 dilution and oxygen replenishment – Continuous fresh air supply at 360m³/h maintains CO2 below cognitive impact thresholds and supplies adequate oxygen in occupied spaces, improving work efficiency and quality of life
- Quiet operation at ≤48dB(A) – Low noise level suitable for bedrooms, classrooms, and offices where acoustic comfort is a requirement
- Five duct connections (5 × φ150mm) – Multiple inlet and outlet connections enable flexible duct routing for whole-space fresh air distribution in larger or multi-room installations
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | XFDD3-360-01JP |
| Rated Voltage | 220VAC / 50Hz |
| Power | 280W |
| Air Volume | 360 m³/h |
| PM2.5 Filtration Efficiency | ≥ 98% |
| Electrostatic Voltage | 4000VAC – 8000VAC |
| Heat Recovery Efficiency | 65% |
| Cooling Recovery Efficiency | 57% |
| Noise | ≤ 48 dB(A) |
| Inlet and Outlet Duct Diameter | 5 × φ150mm |
| Dimensions | 1316 × 821.5 × 277mm |
| Weight | 27 kg |
Legom Fresh Air Product Comparison
| Parameter | XFDD3-360-01JP | XFDD2-650-01J | XFQT-60-01S |
|---|---|---|---|
| Air volume | 360 m³/h | 650 m³/h | 60 m³/h |
| PM2.5 efficiency | ≥98% | HEPA grade | Ion catalytic |
| Heat recovery | 65% heating / 57% cooling | None | None (65-01S: partial) |
| Consumables | Zero | HEPA filter | None |
| Power | 280W | 320W | 12W |
| Target application | Bedroom, school, office | Campus, commercial | Residential room |
Application & Use Cases
- School classrooms requiring energy-efficient ventilation – High occupancy and CO2 generation from students combined with the building operator’s need to minimize heating and cooling costs makes total heat exchange with fresh air purification the most cost-effective long-term ventilation solution for educational buildings
- Office environments with year-round HVAC operation – In offices where air conditioning operates throughout the year, recovering 57–65% of the energy from exhaust air before it leaves the building significantly reduces the total energy consumption of the ventilation system over the building’s service life
- Bedrooms requiring quiet, continuous fresh air at night – At ≤48dB(A), the XFDD3-360-01JP operates at a level compatible with sleep in most bedroom environments, providing continuous CO2 dilution and oxygen replenishment during sleeping hours
- Buildings in climates with extreme seasonal temperatures – The greater the temperature difference between indoor and outdoor air, the more valuable heat exchange becomes. In cold winters or hot summers, recovering 65% of heating or 57% of cooling energy from exhaust air provides proportionally greater energy savings
- Environments requiring zero-consumable long-term operation – Where filter replacement logistics, costs, or supply chain risk are concerns, the zero-consumable ionization-coupling system eliminates dependency on replacement media throughout the unit’s service life
Installation Notes
- The XFDD3-360-01JP is a large unit at 1316 × 821.5 × 277mm and 27kg. Plan the installation location to ensure structural support, service access, and adequate clearance for all five duct connections before beginning installation
- Five φ150mm duct connections must be planned and routed before the unit is mounted. Coordinate duct routing with fresh air intake (outdoor), supply air outlets to served rooms, exhaust air intakes from served rooms, and exhaust air discharge (outdoor)
- Standard installation requires wall drilling for outdoor air intake and exhaust penetrations. Follow all local building regulations regarding wall penetrations and ventilation system installations
- Connect to a dedicated 220VAC / 50Hz circuit with an independent circuit breaker for safe isolation during maintenance. Do not share the circuit with high-current equipment
- The ionization-coupling system generates high-voltage electrostatic fields (4000–8000VAC) internally for purification. Ensure the unit housing is intact and properly grounded before energizing
- Seal all duct connections airtight to prevent air leakage that would reduce both fresh air supply volume and heat recovery efficiency
- Allow adequate service clearance around all panels for periodic inspection, cleaning of the heat exchange core, and access to the ionization module
- Refer to the user manual for detailed installation procedures, fixing methods, and after-sales service policy
Frequently Asked Questions
What is a total heat exchanger and how is it different from a sensible heat exchanger?
A sensible heat exchanger transfers only temperature between the exhaust and supply air streams — warm exhaust air pre-heats cold incoming fresh air in winter, or cool exhaust air pre-cools hot incoming air in summer. A total heat exchanger transfers both temperature and moisture (latent heat). This is important because in winter, exhaust air carries significant moisture from occupant respiration and activities. Transferring this moisture to the dry incoming fresh air reduces the need for supplemental humidification. In summer, transferring moisture from humid outdoor air to the drier exhaust air reduces the dehumidification load on the air conditioning system. The XFDD3-360-01JP achieves 65% heat recovery and 57% cooling recovery through total heat exchange.
What does zero consumables mean in practice?
The XFDD3-360-01JP uses ionization-coupling purification powered by a 4000–8000VAC electrostatic field to capture and neutralize airborne particles, eliminate odors, and sterilize bacteria and viruses. This process does not consume or degrade a physical filter medium. Unlike HEPA filter systems where the filter must be replaced periodically — incurring ongoing cost and maintenance visits — the ionization system continues to operate without replacement parts throughout the unit’s service life. Periodic cleaning of the ionization module and heat exchange core is still required, but no consumable media purchases are needed.
How does two-way ventilation prevent cross-contamination?
In a two-way ventilation system, the supply air path (fresh outdoor air entering the building) and the exhaust air path (stale indoor air leaving the building) are physically separated within the unit by dedicated channels and the heat exchange core. The two air streams pass in close thermal contact through the exchanger to transfer heat and humidity, but they do not mix. This prevents exhaust air pollutants, odors, bacteria, and viruses from being drawn back into the supply air stream — a risk in single-duct recirculation systems or in poorly designed heat exchangers where air leakage between paths occurs.
How does the XFDD3-360-01JP compare to the XFDD2-650-01J campus ventilator?
The XFDD2-650-01J delivers higher air volume at 650m³/h and uses a HEPA filter for physical PM2.5 capture, but has no heat recovery function and requires periodic HEPA filter replacement. The XFDD3-360-01JP delivers a lower but still substantial 360m³/h with ≥98% PM2.5 efficiency through ionization, adds total heat exchange recovering 65% heating and 57% cooling energy, has zero consumables, and is quieter at ≤48dB(A) versus ≤55dB(A). Choose the XFDD2-650-01J when maximum air volume is the priority; choose the XFDD3-360-01JP when energy recovery, zero consumables, and total heat exchange are the design priorities.
Can the XFDD3-360-01JP serve multiple rooms simultaneously?
Yes. With five φ150mm duct connections, the XFDD3-360-01JP is designed to distribute fresh supply air to and collect exhaust air from multiple rooms in a building through a central duct network. This makes it suited for whole-apartment, whole-floor, or whole-classroom-block fresh air systems where a single unit serves several connected spaces. Contact the Legom team for duct layout guidance and airflow balancing recommendations specific to your building configuration.
OEM & ODM Customization
Legom supports OEM and ODM services for the XFDD3 Total Heat Exchanger 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.
