My wifey as well as I consistently forget to change the oil furnace filter on our heating equipment, and once a week you need to change the air filter, but this is because after a week of use, the filter is blocked with dust. The air filter is literally the only line of defense against dust getting in your system. Once it gets blocked, all the dust runs into the heater, but why is this super bad? Well first lots of dust in the oil furnace means the indoor air conditions is going to be dusty! Breathing in dirty air is entirely awful for you as well as can make you sick. Expect to sneeze, cough as well as get headaches all from this, however a greater issue is that the dust makes the heating unit labor harder. With a layer of dust in it, the oil furnace has to power though longer as well as labor harder to provide heating. The worst thing ever is that if the oil furnace works too hard, it will overheat. Then the oil furnace heat exchanger could crack as well as release carbon monoxide in the home. Or the oil furnace could catch on fire due to the dust. So apparently increasing the air filter once a week is a immense deal. The numerous of us just can’t remember though. All of us tried setting alerts on our cellphones, putting it on a calendar as well as taking turns doing it, but nope, we consistently forget to do that 1, but super important task. One of these afternoons we are going to come to a burnt apartment or die from carbon monoxide poisoning since we were too lazy.