välisõhuvaru

Välisõhuvaru refers to the amount of fresh outdoor air supplied to an indoor space. This is a crucial element in maintaining good indoor air quality and occupant health. In buildings, especially those that are well-sealed for energy efficiency, controlled ventilation is essential to replace stale indoor air with fresh outdoor air. This process helps to dilute and remove indoor pollutants such as carbon dioxide, volatile organic compounds, allergens, and moisture.

The required välisõhuvaru is determined by various factors, including building codes, occupancy levels, the type of activity taking place within the space, and the potential for pollutant generation. Standards like ASHRAE 62.1 provide guidelines for minimum outdoor air ventilation rates for different building types and occupancies. Insufficient välisõhuvaru can lead to a buildup of indoor pollutants, resulting in symptoms commonly known as "sick building syndrome," which can include headaches, fatigue, and respiratory irritation.

Conversely, excessive välisõhuvaru can lead to increased energy consumption for heating and cooling, as the building's HVAC system must condition the incoming outdoor air to the desired indoor temperature and humidity. Therefore, balancing adequate ventilation with energy efficiency is a key consideration in building design and operation. Modern ventilation systems often incorporate demand-controlled ventilation (DCV) strategies, which adjust outdoor air intake based on real-time occupancy or pollutant levels, optimizing both indoor air quality and energy performance.