In recent years, SiÅs Bolig has already undertaken several measures in order to reduce impact on the environment.
EHF-faktura: electronic invoices sent to all public bodies: reduced use of paper.
Increased bicycle parking in Pentagon.
Digital contracts and signatures: reduced use of paper.
Heat pumps: Pomona og Pentagon - in 2009 SiÅs installed a hydronic heat pump in Pentagon II (KLM): it is a kind of thermal warming, an earth to water heat pump installed in 2008. In M-L, heat pumps were also installed for domestic water. The whole of Pentagon has hot water from geo-thermal energy. Pentagon also has a centralised control system for central heating.
The windows in Pentagon have been replaced.
The ventilation in Pentagon and Skogveien has been time-automated.
Lighting in the corridors, stairwells and common areas in Pentagon (ABC-HG-IJ) have been switched to more energy efficient alternatives.
Renovation of apartments in Skogveien with additional insulation and insulated glass.
The Kaja student accommodation now has new windows and main doors.
Pentagon has switched to low-energy outdoor lighting, lowering of temperature at night-time, and a cut in heating in shared areas (KML).