Positive pressure
For our purification systems we use what is called Positive Pressure.
This means we push clean air in to your home/office/school and push the bad air out thru cracks and leaks. This way we constantly exchange the air with fresh clean air with low CO2, no particles or formaldehyde simply clean air.
The result is better sleep, no headache due to stale or toxic air. No more stuffy air.
The systems are continuously regulating the purification to fit the demand of the building.