| The last time the guy came to change the filter, I must have drawn a newbie straight out of HVAC school. He took me to the basement, where the furnace and humidifier are and showed me (now, we've lived in this new house for 7 years.....)there is a lever that should be moved at the end of winter and at the end of summer. It automatically shuts off vent systems (not just individual vents in the rooms) during those times. I suppose that would be the 2nd floor in the winter (the downstairs warm air should rise) and it would be the 1st floor in the summer (the floors in our 1st floor are usually cool from the basement). I did NOT know that! We've been shutting vents off in certain unused rooms since we lived here. Our bill dropped the following month by about $50. I credit the HVAC guy for telling me how to regulate the temp. Now, there's no uncomfortable room - before I couldn't sit in the living room without freezing to death (hubby was comfy, though). Maybe you have something like that in your house. It was way up in the top part of the furnace.
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