The goal of this study was to investigate in four Swiss specific use cases whether the implementation of IoT equipment can act as an enabler for climate protection and the Energy Strategy 2050 in terms of reducing CO2 emissions. Further, the potential quantity of CO2eq savings for Switzerland regarding the use cases for the year 2020 was analysed. The analysed use cases were remote PV monitoring, remote filling level monitoring of waste containers and heating optimisation, once for a service building and once for a multifamily house. The results clearly show that the grey energy of the IoT equipment is negligible in all investigated use cases compared to the avoided amount of CO2eq emissions. The upscaling of the results was based on assumption and gives a possible order of magnitude of annual savings in the year 2020 for Switzerland: 2.4 kt for PV monitoring, 115 t for level monitoring of waste containers, 0.3 Mt in the heating optimisation of service buildings and 2.3 Mt in the heating optimisation of domestic space.