loftskiptum
Loftskiptum is an Icelandic term used in building and ventilation engineering to describe the deliberate exchange of indoor air with outdoor air. The primary purpose is to dilute indoor pollutants, control humidity, and maintain thermal comfort for occupants. Loftskiptum can be achieved through natural ventilation, where openings such as windows and vents allow air to move driven by wind or buoyancy, or through mechanical ventilation, including exhaust, supply, or balanced systems. Modern buildings often employ mechanical ventilation with heat recovery (ERV) or heat recovery ventilation (HRV) to minimize energy loss while preserving air quality.
Ventilation rates are typically expressed as air changes per hour (ACH) or as volumetric flow rates per
Design considerations for loftskiptum include the airtightness of the building envelope, filtration quality, humidity control, and
Historically, the concept of exchanging indoor air with outdoor air arose from concerns about indoor pollutants