Fresh Air Unit
Patented closed circulation

Comparing to household air purifier, fresh air unit can bring in outdoor fresh air that rich in oxygen.

But when the air is very bad condition,

it becomes improper to bring in outdoor air in this case,

LONDS patented closed circulation system works efficiently to produce fresh air.

Comparing to household air purifier, fresh air unit can bring in outdoor fresh air that rich in oxygen.

But when the air is very bad condition,

it becomes improper to bring in outdoor air in this case,

LONDS patented closed circulation system works efficiently to produce fresh air.

Patented closed circulation

This design provides a convenient installation solution to the users and makes it also very convenient for maintenance.

This design provides a convenient installation solution to the users and makes it also very convenient for maintenance.

Unique design of panel
Visible Panel

Beautifully and practically designed panel

Drop-down Panel

The panel can be easily opened up for operations

Patented soft joints with cushioning panels

Convenient for installation and effectively reducing the noise and vibration

Pre-heating and anti cold wind PTC heating device, with sensors of the outdoor temperature, works to pre-heat when the outdoor air temperature is remarkably lower.