I had a rough choice to make temporarily.
My central heating and air conditioning system was having issues with condensation dripping from the air vents.
And let me tell you that I hated that! It was causing potential mold on my carpets. Until I could get a heating and air conditioning professional out to my house to fix this problem I had to figure out something. I did not want to completely turn off my central heating and cooling unit because it is still summer and I need my air conditioning. But if I close the air vents that are dripping, I can stop the water from going on the carpet and just use a portable air conditioning system to help keep the room it is happening in cool. But the drawback to this is hearing a whistling noise when I close my air vents and have the central heating and air conditioning system running. Thankfully though, the room having the condensation issues is the living room, so the whistling of the air vents would not keep me up at night while trying to sleep. I did it for a few nights and then decided that a better way to go would be to just shut off the central heating and air conditioning system and then go out and buy a few more portable air conditioning systems to cool my home that way until a certified heating and air conditioning specialist could get out to my house. I was not going to pay for emergency HVAC service because I could get by for a little without.