ventilatsioonisoojus

Ventilatsioonisoojus refers to the heat loss or gain that occurs due to the ventilation of a building. Ventilation is the process of exchanging indoor air with outdoor air, which is essential for maintaining good indoor air quality, removing pollutants, and controlling humidity. However, this exchange of air also results in the transfer of thermal energy.

When the outdoor air is colder than the indoor air, ventilation leads to heat loss. This means that the heating system must work harder to compensate for the heat being expelled from the building and replaced by cooler outside air. Conversely, when the outdoor air is warmer than the indoor air, ventilation can lead to heat gain, which can increase cooling loads in the summer.

The amount of ventilatsioonisoojus depends on several factors, including the ventilation rate (how much air is exchanged per unit of time), the temperature difference between indoor and outdoor air, and the building's insulation and airtightness. High ventilation rates and significant temperature differences result in greater heat loss or gain.

To mitigate ventilatsioonisoojus, heat recovery ventilation (HRV) or energy recovery ventilation (ERV) systems are often employed. These systems pre-condition the incoming fresh air using the thermal energy from the outgoing stale air. HRV systems transfer sensible heat (temperature), while ERV systems transfer both sensible and latent heat (moisture), helping to reduce heating and cooling energy consumption and improve overall building energy efficiency. Minimizing uncontrolled air leakage (drafts) also plays a crucial role in reducing unwanted ventilatsioonisoojus.