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The Condensation From the Window A/C Is Dripping on the Sidewalk

Condensation is a natural byproduct of the method of cooling used by all air conditioners. Unfortunately, the default setup in a unit may allow the condensation to drain from the back of the air conditioner case, causing problems like pooling in a yard, attracting flies and mosquitoes or dripping onto a sidewalk, creating a nuisance or stain. You can do several things to rectify the situation.
  1. Condensation Catch Bucket

    • A simple solution is to use a rain barrel or large bucket to catch the water as it drips down to the sidewalk, which works best for air conditioners that are installed in first floor windows. The water emanating from the air conditioner is essentially distilled water, making it highly corrosive to ferrous metals and unsuitable for drinking. It does, however, function well in irrigation for any nonedible plants such as ornamental flowers and shrubs.

    Efficient Air Conditioners

    • The most efficient window air conditioners actually make use of the condensation they remove from the air. The water is pumped up and sprayed over the hot side of the refrigerant coils, aiding them in cooling and reducing the amount of time the unit needs to run, thereby saving electricity. If condensation is an issue and your unit is not so equipped, upgrade and reap the benefits both in your reduced electric bill and dry sidewalk.

    Outdoor Hose

    • Condensation from a window air conditioner drains from a drain plug, typically located towards the back of the unit. These plugs are generally sized to fit a specific diameter hose. Measure the plug, and purchase a length of hose of the proper diameter. You'll need to purchase enough hose to run down the side of your building and tuck behind a shrub or elsewhere that will allow the unit to drain out of the way.

    Indoor Hose

    • For second floor or higher apartments, running a hose from a window air conditioner to the ground may simply not be feasible. In this case, run the hose back into the room where the air conditioner is located. Feed the hose into a catch or basin, and use the accumulated water to water houseplants. Ensure the basin has a lid on it to prevent evaporation, which would cause increased humidity and make your air conditioner run longer. A large water jug for a water cooler will do nicely.