Home energy data logging project

[AC_Hacker]

Originally Posted by strider3700

You can clearly see the effects of me closing the office door right at the start and then opening it in the morning right at the end. THe gradual middle of the night climb is from me getting the fire going better.[/IMG]

I confess that I haven't been following this thread from the beginning, so pardon if I've missed something...

I understand the trend lines, but what causes the short-duration periodic swings?

-AC_Hacker