Installing an Evaporative Cooler

Help keep your house cool with a window-mounted evaporative cooler

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Evaporative coolers, also known as swamp coolers, pull in fresh outside air through moist pads, where it is then cooled by evaporation and circulated through the house by a large blower. These coolers typically are used where the air is hot and humidity low. This guide outlines the steps needed to install a window swamp cooler.

Tip: Before learning how to install a swamp cooler, you must first select the best one for your needs. There are many kinds available, including roof swamp coolers, side draft evaporative coolers, down draft evaporative coolers, whole-house coolers and small space options. See our evaporative coolers buying guide for help in deciding if a window-mounted cooler is a good fit for your home.

What You Need

1
INSTALL HANGER AND SUPPORT
INSTALL HANGER AND SUPPORT

• Mount the support hangers, then assemble and install the support brackets following the manufacturer instructions.
• If needed, build up the outside windowsill to support the cool-air vent that goes through the window.

2
INSTALL THE COOLER
INSTALL THE COOLER

• Place the cooler in the window, resting the vent on the support assembly.
• Attach the cooler to the brackets as directed by the manufacturer’s instructions.

3
RUN WATER LINE TO THE COOLER
RUN WATER LINE TO THE COOLER

• Tap into the water line and run a water supply line to the cooler.
• Install a cut-off valve that you can easily drain in the winter.
• Attach a hose to the overflow drain line of the cooler and run the hose on the ground, well away from the foundation.

4
TURN ON THE COOLER
TURN ON THE COOLER

• Attach the air vent to the front of the cooler. 
• Plug the power cord into any grounded 120-volt circuit inside the house.