How do you determine a upright heat for your important nouns system? I just get central nouns in my own home. What...

I just get central nouns in my own home. What should I set it at depending on what the outdoor heat is?

Also, should we leave it on when we are at work? Does it cost more when it is powered on and sour?
Answers:    USA Do not set your indoor temperature base on the temperature outside - set it at the temp you are comfortable inside. For me explicitly 75, for you it might be 72. The higher the temp, the more $ you salvage in verve bills.

Whether you should leave it on when you are at work or not is a judgement telephone. If there is amazingly little outside temperature variance during the time, let's say 70 contained by the am and 80 in the pm, and you are ably insulated - R19 in walls, R30 within ceiling - I would leave it on 24 hours per time.
Get one of those programmable thermostats. It can be set to adjust the temp when you are not at home and automatically turn it up when you will be there, and down when you will be gone. They are worth the investment.