What might cause water droplets to be forming at my ceiling a/c vents in alot of my rooms of my house?

Question

Lately, I have been trying to seal off "leaks" of hot air coming from my attic and interoir walls of my 1960 built home. And I still have some yet to do. Now I am getting these water droplets on some of the air vents closest to the blower unit in the hall way closet. We like to run the a/c at about 73 in the daytime and kick it down between 70-71 starting around 6:00 pm. Would someone please educate me a bit on this situation. Thanks.

Answer 1

Have you by any chance recently (since your home was built) resided it with stucco or anything that used a Styrofoam covering underneath the outer sheathing? That might be what is doing it if you have. It could be that your house is not breathing, or letting the humidity out.

Answer 2

maybe your ac unit is to big for your house,its not running long enough to take out all the humidity in the house,hope this helps.

Answer 3

What part of the country do you live in. If it's in the deep, humid hot air South, your a/c outlet air system is not properly insulated against said hot, humid air from which the humidity is condensing out when coming into contact with the relatively cold surfaces of the distributing duct-work. You SHOULD continue to do everything practical to seal off all outside air from the living spaces inside your home. The cooling coil of your a/c system should be 'knocking out' the major part of the water vapor from the air being circulated inside of your house. Be sure that there is a steady stream of condensate (water) running from the collector pan under the inside expansion/cooling coil through piping to the outside of the house

Answer 4

its one of two things what kind of duct grey ?that's mylar that needs replaced two metal? bad or worn insulation that insulation needs to be wrapped tight all the way to the sheetrock otherwize condensation will form in the duct and come out your vents  

Answer 5

Check to make sure that there is insulation covering the duct all the way down to the register. The insulation should also be taped tightly where the duct connects to the register or boot. The water droplets are condensation forming where the cold air is coming into contact with the warm metal on the boot or register. Making sure that the metal boot or register is insulated will keep it closer to the temp of the air being discharged and eliminate the condensation.

Answer 6

Inadequate airflow will cause that.

Answer 7

The first place to look at is the evap coil to make sure it is clean, if the coil is dirty the temp will be too cold out of the vents and the system will not remove the humidity from the rooms and will cause the vents to sweat.