An interesting option are the natural gas powered heat pumps from Robur, an Italian company. https://www.robur.com/en-us/applications/solutions/solutions-for-r

An interesting option are the natural gas powered heat pumps from Robur, an Italian company. https://www.robur.com/en-us/applications/solutions/solutions-for-residential https://www.robur.com/en-us/applications/solutions/solutions... https://www.robur.com/en-us/products/gahp-a https://www.robur.com/en-us/products/gahp-a