So, having a bit of fun! OK- 66.2 F is sweater weather or standard stone castle weather!
1) how would the Swiss authorities know that ? Men in white suits with thermometers banging on apartment doors? Must be a Big Brother Thermostat!
2) What if you heat with wood and turn off the gas?
Canada, Switzerland... You live in this weather! Kids playing hockey on Georgian Bay in January is just happy fun!
Lunch outside in Zermatt is "froelich!" You can watch the people skiing right up to the Restaurant!
What ever it is, its a whole lot better than living in the standard substandard1940s Stalin era 40 degree F apartment perched on the permafrost in Archangel USSR!