Msz-fe12na installed. Live in nova scotia,canada. I am wondering what to do as seasons change.e.g.Do I leave the system on all year(except for filter changes) and just switch between heating and cooling (as suggested by installer) or do you switch off and on and use only as required? Switch on/off I guess would cause humidity to fluctate more I think.What is the best for both the unit and the house,in your opinion?

Thank you for your help.

Layne in Nova Scotia