Can Central Air Humidifiers Cause Flooding From Condensation?

Humidifier Condensation

• Humidifiers can build up condensation in your home's duct work. This condensation can leak out of a central air humidifier into the duct work beneath it. This does not mean such leaks will cause a flood, but the issue can still pose a problem. Humidifiers are designed to put water vapor into the air; but if they work too quickly or if the humidity of the air is already high, condensation will form within the duct work.

Flooding Possibilities

• Flooding should not be a problem with a central air humidifier. Even if the humidifier does leak due to condensation, these will be small leaks located almost entirely within the duct work and shouldn't create flooding conditions. If there is water on the floor around vent entry points, check the drains for clogs first before moving onto the humidifier.

Furnace Damage

• Condensation leaks from the humidifier can do damage all on their own -- especially to the furnace below. If the water leaks into the furnace, it not only can cause electrical problems but can also ruin the heat exchanger. Condensation that leaks down from the humidifier can also pick up dust and dirt -- a corrosive mix that can potentially damage furnace components.

Duct Work Damage

• The duct work that your humidifier uses may also be in danger of damage if there are condensation problems. Condensation inside the ducts tends to stay trapped there. When it mixes with the dust in the ducts, it can begin causing a number of problems, including corrosion and mold. Water and darkness in the ducts are an ideal mold-growing environment, which will ultimately require cleaning and remediation to fix.