• 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).