Once a year you should get your Heating and A/C worked on.
For me, I do a twice a year cleaning.
I get the A/C portion focused on in Springtime and the heating method in the fall. I have a central heating and cooling machine though. So it is one method that gets the repair on it, but for cooling, I get current refrigerant and the fan blades checked. For heating it is all about the dust in the system. I definitely like getting the twice a year cleaning to ensure our air quality is fresh. I also want to remove all the hair that gets in our system. I have definitely long hair and I shed worse than any dog. I have to wipe our dryer lint trap regularly. My tub drain needs to be snaked yearly. I also vacuum and sweep to get the hair off our floors. An air filter should be able to last in a method for around numerous weeks. With our long hair, 2 to numerous weeks is about all it can take. So I figure that normal people go a year with one cleaning, I do 2 cleanings to get our hair removed from it. The air filter doesn’t stop everything from getting in the system. I don’t want to have our long hair ruining parts in the Heating and A/C. I also get ductwork cleaning way more than any normal homeowner does as well. I don’t want dust, debris and again, our hair clogging up the ductworks. The method of breathing in our old, dusty hair sounds disgusting.