How To Vent A Portable Air Conditioner Without A Window?

A portable air conditioner can be installed in a room without a window and it can easily vent the hot air by considering many options. The procedure is quick and convenient if you have the right tools for it.

A portable air conditioner and a vent air must function properly. The air conditioner takes in the warm air from the room, cools down the air, and returns it to the room.

Warm air is exhausted from the air conditioner. If the air conditioner does not vent the warm air, it returns to the room which decreases the efficiency of cooling power.

The portable air conditioner is the best choice for rooms that do not have windows.

Portable air conditioners are handy and can be placed in any room that has less or no windows such as basements, attics, and office spaces.

Different Ways to Vent a Portable Air Conditioner Without a Window.

Vent the Air Through the Door: Venting from the door is a convenient way to vent the warm air. AC can work. For sliding doors, kits are available that can be used to vent the warm air.

Hose pipes are short in length so they need to be placed near the sliding door.

Pet doors can also help vent warm air from the room. The vent panel should be measured and assembled. After that weather sheets are applied to the door frame.

Vent through the Wall: Venting can also be done by making a hole in the wall. Choose the right and best tools to make a hole in the wall because the hole can not be undone or reversed. 

The size of the hole depends on the diameter of the hose pipe. Seal the hole properly once you have drilled it. It will help to avoid dirt and dirt entering the room and air conditioner.

Silicone caulk can be used to seal the hole. Hose’s tip is cut at a 45-degree angle and it is placed inside the caulk gun. Apply caulk around it on the wall.

Drilling is easy and quick on the drywall and wood wall. Review the building’s architecture plan before drilling the hole.

Measure the diameter of the hose and make the hole through the ceiling using a saw.

The exhaust hose is passed through the wall vent. The panel is installed on the outside of the panel. Silicon caulk is used to seal the opening around the hose.

Make sure to check for studs and electrical wiring. It can weaken the structure of the house and electrocution can be caused.

Venting through the Ceiling: Venting can be done through the ceiling if the room has a drop ceiling.

In old common houses, a drop ceiling is available. A hole is made through the ceiling panel to vent the air.

Electric wires and pipes should not be disturbed that are present on the top of the ceiling.

After drilling a hole, pass a vent hose from the hole. Seal the hole with silicone sealant.

Make sure that the heat and humidity level should not be high. High levels of humidity can cause mold to grow in the ceiling space.

Technical knowledge is required to set the vent hose in the ceiling panel. Ceiling vent kits are also available that allow venting easy and convenient.

Venting heat from the ceiling can be lost 20-30% if there are leaks, holes, and poor connections.

Venting through the Dryer Vent: Dryers can be used to vent the hot air from the room. Make sure the diameter of the dryer should be large enough that warm air should be vented from the room freely.

Make sure the dryer can vent hot air easily then connect it to the AC’s hose. If it does not vent the hot air properly, it can cause a fire to start in the room.

Keep an eye on the air conditioner and the dryer to make sure that they are operating properly.

Is Venting Hot Air From a Portable Air Conditioner Necessary?

Portable air conditioners work the same as other air conditioners.

Venting is mandatory as it collects the warm air from the room, passes it to the refrigerant where this air is cool down, and is turned back to the room in the form of cool air.

The hot air is exhausted through the vent pipe/ hose to the outside of the room.

Ventilation is required to remove hot or warm air from the room. If the vent hose is inside the room, the cold and warm air will be mixed and it will damage the cooling efficiency of the room.


Venting hot air from the air conditioner is necessary and it requires the hot air to go outside the room. But if the room is without a window, venting can also be done in that room by different means.

It can be done by adjusting the vent hose in the door or drilling a hole in the wall, or ceiling panel. You do not need to worry about the windowless room.

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