An exhaust (diffuser) is a ventilation component which, unlike a supply diffuser, has a special “ball” inside. Thanks to this, the air flow does not spread conically or horizontally across the ceiling, but is directed downwards. This is what makes the air sucked in differently than with a classic supply diffuser.
How to regulate it?
Ball tightened (retracted): air is sucked in evenly, in a cone shape. This is the most effective and quietest way to extract air from the entire room.
Ball unscrewed (lowered): air is sucked in vertically, without “spilling” to the sides. In this case, the extractor is less effective at collecting dust, but better at dealing with heavy gases and odors lingering near the floor.
What happens if you close it too tightly?
It’s like trying to stop water with a dam – the air flow won’t stop, but there will be a lot of resistance. The heat recovery unit will then have to work harder, the fans may be louder and wear out faster.
THE AIR EXHAUST DOES NOT REGULATE THE INSTALLATION
The air exhaust is used to set the direction of air flow, not to regulate the entire system. The efficiency of the ventilation system in heat recovery is set by the number and length of the pipes, not by turning the air diffuser’s.
