lavenergihus

A lavenergihus, or low-energy house, is a building designed to consume significantly less energy for heating and cooling compared to conventional buildings. The primary goal is to achieve a comfortable indoor climate with minimal reliance on external energy sources, thereby reducing energy bills and environmental impact.

Key principles of lavenergihus construction include superior insulation of the building envelope, which encompasses walls, roofs, and floors, to minimize heat loss in winter and heat gain in summer. High-performance windows and doors with multiple glazing layers and insulated frames are crucial components. Airtightness is another vital aspect, preventing uncontrolled air leakage that can lead to drafts and energy waste.

Ventilation is typically achieved through a mechanical ventilation system, often with heat recovery (MVHR). This system ensures a constant supply of fresh air while preheating or precooling incoming air using the heat from the outgoing stale air. This process significantly reduces the energy needed for ventilation.

Further enhancements in a lavenergihus can include passive solar design, where the building's orientation and window placement are optimized to capture solar heat during winter months. Thermal mass, materials that can store heat, can also be incorporated to regulate indoor temperatures.

The concept of lavenergihus has evolved, with stricter standards leading to classifications like Passivhaus, which represents a highly energy-efficient standard. The investment in a lavenergihus can lead to substantial long-term savings on energy costs and contribute to a more sustainable built environment.