Poistoilmanvaihdon

Poistoilmanvaihto, also known as exhaust ventilation or exhaust air system, is a mechanical ventilation method primarily used to remove stale air, impurities, odors, moisture, and pollutants from indoor environments. This system is commonly employed in residential, commercial, and industrial buildings to ensure indoor air quality and create a healthier living or working space.

In a typical poistoilmanvaihto system, air is extracted from designated rooms such as kitchens, bathrooms, or laundry areas through exhaust vents equipped with fans. The displaced indoor air is then expelled outside, maintaining a balanced or slightly negative pressure indoors. To compensate for the outgoing air, fresh outside air can be supplied through controlled intake vents in a ventilation system known as balanced or supply-and-exhaust ventilation.

The system plays a crucial role in preventing moisture buildup, mold growth, and the accumulation of indoor pollutants, thereby protecting structural integrity and health. It is especially important in energy-efficient buildings with limited natural ventilation. Proper design and maintenance of poistoilmanvaihto systems are essential to ensure effective air exchange rates, energy efficiency, and noise control.

Regulations and standards governing poistoilmanvaihto vary by country but generally emphasize adequate airflow, energy efficiency, and indoor environmental quality. Modern systems often incorporate sensors and automation to optimize performance, reduce energy consumption, and enhance user comfort.

Overall, poistoilmanvaihto is a key component in building ventilation strategies, contributing to sustainable building operation and improved indoor environmental health.