2 ms·

Professional lüfter?

• bradknowles 4y ago
  No, more like the guy who designs how the airflow in your home should work, without opening any windows. Making sure you get a balance of enough clean air coming in, plus making sure you have the right amount of humidity control, and the right amount of exhaust of air containing too many contaminants, plus the right amount of heating and cooling, and everything else.