Päiväyölampimointi

Päiväyölampimointi is a Finnish term that translates to "day-night heating" or "diurnal heating" in English. It refers to a system or strategy where heating is adjusted based on the time of day, specifically to take advantage of different temperature conditions or electricity price fluctuations. This approach is commonly implemented in buildings, particularly those with good insulation and thermal mass, such as passive houses or buildings utilizing phase change materials.

The core principle of päiväyölampimointi is to pre-heat a building during periods when energy is cheaper or when ambient temperatures are more favorable for heat gain, and then to allow the building to retain that heat for a significant duration. This can involve heating the building to a slightly higher temperature during the night or early morning when electricity tariffs might be lower, or when solar gains are expected later in the day. The stored heat then reduces the need for active heating during warmer daytime hours.

This method aims to optimize energy consumption and reduce heating costs by leveraging natural temperature fluctuations and potentially variable energy pricing. It requires careful planning and control systems to ensure comfort is maintained while maximizing energy efficiency. The effectiveness of päiväyölampimointi depends on factors such as building insulation, thermal mass, climate, and the availability of smart metering or time-of-use electricity rates.