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Ceiling-mounted fresh air handling units
Ruidong or OEM
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You seal the windows for energy efficiency. You run the air conditioner. And the air inside stays inside—getting stale, stuffy, and polluted hour after hour. Indoor air often contains 2 to 5 times more pollutants than outdoor air. And opening windows isn‘t really a solution, either—it invites traffic noise, pollen, dust, and security risks.
This RUIDONG ceiling-mounted fresh air handling unit solves both sides of the equation at once.
The unit continuously draws fresh outdoor air, filters it through three stages of cleaning, and delivers it into your building while simultaneously pulling stale indoor air out. This creates a balanced cycle of air exchange—fresh in, polluted out.
Unlike simple exhaust fans that only remove air (and cause negative pressure issues), this system brings in just as much as it pushes out. Indoor pressure stays stable. No slamming doors. No makeup air being sucked in through chimneys or gaps.
Three-stage filtration takes care of the incoming air:
G4 primary filter: catches larger particles like dust and lint
HEPA13 high-efficiency filter: removes PM2.5, pollen, and fine particulates with 99%+ efficiency
Activated carbon filter: absorbs smoke, cooking fumes, formaldehyde, and other VOCs
Outdoor air doesn‘t come in dirty. And indoor air doesn‘t stay contaminated.
No energy penalty for fresh air. Traditional ventilation simply dumps conditioned air out and pulls unconditioned air in. The air conditioner then has to work double time to re-heat or re-cool that fresh air.
This unit uses a full heat exchange core that captures up to 70% of the energy from outgoing stale air and transfers it to incoming fresh air. In summer, the hot outdoor air is pre-cooled by the outgoing cool indoor air. In winter, the freezing outdoor air is pre-warmed before it ever hits your heating system.
Operators see real reductions in HVAC load. Depending on climate and building type, heat recovery can cut annual air conditioning energy consumption by 25% or more.
Installed in the ceiling—out of sight. The unit mounts entirely within the ceiling cavity, connected by ducts running to each room. Nothing on the wall. Nothing clutter the floor. Just clean air moving quietly through registers.
No noise, even at full operation. Between soundproofing material in the casing and brushless DC motors, the unit runs quietly enough that occupants don‘t notice it.
Smart control is standard. Smart switches provide easy operation. And the system can integrate with BMS (building management systems) for centralized monitoring and demand-based ventilation control.
The product‘s name says it directly: this single unit replaces several separate systems.
Air purification: Removes PM2.5, pollen, dust, smoke, VOCs, formaldehyde.
Energy recovery: Heat exchange core reduces HVAC energy waste.
Ventilation: Continuous fresh air supply maintains healthy CO₂ levels.
Moisture regulation: Balanced airflow helps manage indoor humidity.
Noise elimination: Fresh air without the noise of open windows.
Dust prevention: Windows stay closed; dust stays out.
No need to piece together separate exhaust fans, air purifiers, and window units. One integrated package handles it all.
