Every time our central heating and air conditioning system method has been turning on lately there has been rattling sounds coming from one particular air vent. It is the one in our washroom. I was wondering why this was so I decided to do some research on the internet about this. And the thing it kept pointing to was that the air vent to our central heating and air conditioning system method was loose. So I decided to go plus get our tools plus ladder to go plus check it out, and lo plus behold it was in fact a loose air vent in our washroom that was causing the loud sounds of rattling every single time our central heating and air conditioning system method went on. So I went plus tightened the screws with the respected screwdriver plus it became nice plus firm. I then went to turn on our central heating and air conditioning system method again to see if the rattling was still going to be happening with the air vent in the washroom. And now the loud noise had stopped! It was indeed the fact that the air vent to our central heating and air conditioning system method was loose. It was a fantastic thing I found this out in time. That air vent could have come crashing down plus killed someone, maybe even me! Those things are easily heavy. So know at least I know if I hear a rattle coming from the air vents of our central heating and air conditioning system method to go up there plus service them instantly!