City of Lahti
Energy efficiency boosted in Lahti rental housing
In seven rental housing projects in Lahti, energy efficiency was increased and climate emissions were reduced through various measures. Lahti serves as a good example for other
cities, rental housing companies, and private property owners aiming for emission reductions as part of renovation projects. The selected properties varied in age, thus representing a broad spectrum of Finnish building stock.
Measures included smart heating control solutions, reducing water consumption by updating fixtures, installing air-source heat pumps, and renewing air conditioning controls. The largest single measure was the installation of a wastewater heat recovery system at the Lehtioja service centre, which aims to recover at least half of the waste heat from wastewater.
Calculations of the impact of these measures on energy consumption and carbon dioxide emissions, as well as the monitoring period for the properties, showed savings across all sites. The economic viability of the renovations was also assessed. Residents were advised on energy matters, and information about ongoing energy renovations was shared through social media and resident committee meetings.
