I’m always researching ways to maximize the efficiency of my home. I try to make sure that I shut off lights within my rooms when I’m not inside them. I always change my HVAC oxygen filters so my HVAC system isn’t running as hard. If you can not change your HVAC air filters, then your system could possibly be running more than it needs to. A few tips that I was given from my HVAC technician is to have my furnace tuned up and inspected by an HVAC specialist. This is to ensure it’s safe and ready to use prior to the cold weather approaching. He has also told me that I must keep the area around this furnace clear. I should also keep checking my air filter, so there’s no buildup of dirt. This is to allow maximum air-flow through the filter. It’s important to check the air filter consistently so that your furnace doesn’t run harder and consistently breakdown. Dirt and other particles makes it hard for your HVAC system to function. Always listen to your HVAC technician. I remember my neighbor didn’t focus on his HVAC technician’s advice and was forced to do repairs on his HVAC system by himself. It turned out that next morning he woke to a fire inside the basement. Therefore, leave the intricate HVAC system to a highly qualified and licensed HVAC technician. I never touch my HVAC system unless it’s to confirm and clean the air filter out.