My neighbors are notorious for throwing huge parties all summer long. I have had some issues with them making noise into the wee hours but other than that, it hasn’t been a real issue. Sometimes I am invited to join in the festivities and occasionally I go. The last time I was there I noticed that there was a chill in the air beyond the normal. It was mid-September and the weather was still comfortable. The house was closed up and the HVAC system was running. I thought they should have just opened the windows to enjoy the night air, but, they loved to run the system all the time. It still seemed that the temperature in the room was colder than it should have been. When I questioned my neighbor about it they said that they had been having some issues with the HVAC system for a month or so and couldn’t seem to get it regulated. I suggested that they give my HVAC dealer a call. I had a programmable system installed a few years ago and it seemed to help with the constant swings in temperature at my own home. The old dial type thermostats don’t allow you to have an exact temperature set anyway. You can turn the dial to what you think is 65 degrees and it really could be anywhere between 63 or 67 without you even knowing it. This is not only not energy efficient but can make your home feel uncomfortable too. I think they took my advice because I saw an HVAC truck in their driveway the other day.