Ambient Air

What Size Is a Portable AC Exhaust Hose?

What Size Is a Portable AC Exhaust Hose? - HVAC Insulated

The portable AC exhaust-hose is a necessary attachment for a portable AC unit. Capable of venting air, the air conditioner exhaust-hose’s main task is to expel hot air and water vapor from the portable AC. This important function aids the device in cooling down temperatures in a given area. Portable AC duct-work can come in a plethora of sizes that will depend upon your specific unit. The size of your portable AC exhaust-hose will be measured by its inside diameter (ID) as well as its length. Knowing the size, especially the diameter, of your portable-air-conditioner tube will allow you to solve problems that may occur with your portable AC—perhaps even issues with portable-air-conditioner venting. Complications such as inefficient exhaust flow or an overheating unit could potentially be a result of a malfunctioning portable AC hose. Knowing the inside diameter of your hose will help you purchase a newer, more durable portable-air-conditioner hose replacement, among other things. Nevertheless, we will—through this article—grant you a comprehensive look at the sizing and technicalities of the portable AC exhaust-hose. Along the way, we will answer questions such as:

• What size hose do I need for a portable air conditioner?
• How long is the exhaust hose on a portable air conditioner?
• Are all portable AC hoses the same?
• Does the exhaust hose of portable ACs get hot?

“Air Ventilator Black”

Some Sizes Out of Stock Temperature Range: -20°F to +180°F Sizes I.D. (in.): 4, 6, 8, 10, 12, 14, 16, 18, 20, & 24

“HVAC Ventilation-Flex”

Some Sizes Out of Stock Temperature Range: -20°F to +160°F Sizes I.D. (in.): 4, 6, 8, 10, & 12

“Thermoplastic Flex Medium-Duty WS”

Temperature Range: -40°F to 275°F. Sizes I.D. (in.): 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 22, & 24

“Wind Handler”

Lead Time 4-6 Weeks Temperature Range: -65°F to +250°F Sizes I.D. (in.): 4, 5, 6, 7, 8, 10, 12, 14, 16, 18, 20, & 24

What Size Hose Do I Need for a Portable Air Conditioner?

Most portable air conditioners need a hose with an ID size of 5 inches to about a hose that is 8 inches diameter. This number can vary depending on the unit. The hose for portable-AC-unit vent-work can range in inside-diameter size due to different vent pipes, to which the hose attaches. The only ways to accurately determine the inside diameter of the portable AC exhaust-hose you need is to measure the duct apparatus yourself. You can measure the inside diameter of your AC exhaust pipe by using a ruler or tape measure. Start by choosing a point on the inside, or interior wall, of the duct. You will then place the ruler on another point directly across from the first, which will also be on the interior wall. Measure the distance of the first point to the second point and you will have your ID size. Knowing the ID size of your hose is an important part of caring for your portable air conditioner. Inside diameter excludes the wall thickness of your duct to ensure that it will fit over the outer diameter (OD) of your portable-AC exhaust-vent. If you also desire to purchase a portable-AC replacement exhaust-hose, knowing your ID size is the first step. At, our portable-air-conditioner hoses are available in a range of ID sizes in order to ensure the perfect fit for your specific unit!

For example, if you desire a 5.5-inch diameter portable-AC-unit hose-replacement, our PVC Flexduct Light-Duty Clear Duct Hose comes in such diameter requirements, among others. The PVC Flexduct Light-Duty Clear is designed for air and fume movement with its medium-weight PVC and spring steel-wire-helix composition. This hose features a clear body in order for users to easily locate clogs and blockages inside the portable-air-con. ducting. All of our portable-air-conditioner vented-hoses are highly flexible and compactable, and the PVC Flexduct Light-Duty Clear does not disappoint in this aspect! The PVC Flexduct Light-Duty Clear is stocked in standard ID sizes between 1.25 and 18 inches, making the hose relevant for many different uses. A lot of ductwork also exhibits certain degrees of tolerances which allow the ducts to accommodate ODs that slightly smaller or larger than the ducts’ IDs. The portable-AC duct-size tolerance of the hose will depend on the product.

For example, the PVC Flexduct Light-Duty Clear has a tolerance of plus or minus up to 0.125 inches for hoses up to 8 inches in ID size, and plus or minus up to 0.25 inches for hoses 8 inches in ID size and over. This means that a PVC Flexduct Light-Duty Clear with an ID size of 8 inches could be made to fit an OD of up to 7.75 or 8.25 inches! The size of your portable AC exhaust-hose is imperative to finding your portable-AC hose-replacement. It can easily be found within your unit’s specifications or measured by yourself. Either way, carries ductwork in a multitude of ID sizes in order to ensure safe and secure ventilation.

PVC Flexduct Light Duty Clear_Entry Shot

How Long Is the Exhaust Hose on a Portable Air Conditioner?

The length of a typical exhaust hose that comes with most portable air conditioners ranges from 4 to 12 feet in length. There are certainly portable AC units with longer or shorter exhausts, because how long the exhaust hose is on a portable AC will depend on your unit. However, if the length of your portable-AC hose is not satisfactory, you can proficiently replace your portable-AC-unit hose with a longer hose that fits your needs (as well as your unit’s). Replacing your portable hose in an efficient manner will require you to know the particulars of your unit and may even necessitate some research. The user manual of your portable AC will give you the insight you need in order to make educated decisions on portable-AC exhaust-duct-work. If you are looking for a hose that exceeds the length of the average portable-AC tube, has many ducting options for any portable-air-conditioner. Longer hose-work will grant your unit a greater reach, allowing for more ducting options. At, our selection of portable-air-conditioner hoses come in a range of lengths. The Thermoplastic Flex Medium-Duty WS Thermoplastic Rubber Duct is an extremely durable, general-purpose hose composed of both plastic and rubber. This mixture of materials grants the duct excellent chemical and moisture resistances, as well as resistances to extremely hot and cold temperatures. The Thermoplastic Flex Medium-Duty WS’s durable design allows it to be utilized indoors or outdoors—used in applications anywhere from lawn and leaf collection to portable-AC exhaust-work. The versatility of this hose also reflects its flexible nature. This thermoplastic hose is incredibly flexible; it can be bent to ensure proper ventilation for your portable air-conditioner.

Duct size is not an issue with the Thermoplastic Flex Medium-Duty WS! This rubber duct is stocked in standard lengths of 12.5, 25, and 50 feet, but can be customized to almost any length. With custom cutting available on any of our hoses, supplies excellent-quality ductwork that can adapt to virtually any portable air-conditioner. Typical lengths of 7-foot, flexible air-conditioning hose-work can be replaced with, perhaps, a 12.5-foot Thermoplastic Flex Medium-Duty WS Rubber Duct in order to accommodate your specific portable AC ducting requirements.

Are All Portable AC Hoses the Same?

Not quite. Portable-air-conditioner hoses are not all the same in that each hose has its own material composition, special features, and specifications. However, they are the same in that they have a singular function: ducting air and moisture away from the AC unit. However, portable hoses differ in length and ID size depending on your portable AC’s make or model, as stated prior. A good portable-AC pipe should feature all necessary characteristics to ensure longevity.’s wide variety of portable-AC hosing, from our insulated hoses to the Tornado Flex series, is crafted with durability and flexibility in mind. Our ducts are made to withstand the test of time; they can endure outside abrasions, high and low temperatures, and even fumes and chemicals. There is no better way to ensure a long-lasting hose than to have it fortified with resistant materials such as PVC or neoprene, just to name a few. Many of our portable-air-conditioner hoses are also compressible, making them perfect for mobile tasks. For example, our Tornado-Flex In-Sack Air Ventilation Duct even comes with its own storage bag so it can be easily transported! The Tornado-Flex In-Sack has a 10 to 1 compression ratio, meaning that a 15-foot hose can be pressed down to a length of 1.5 feet. Simply place the Tornado-Flex in its sack for easy storage! The Tornado-Flex In-Sack is a fabric hose reinforced with PVC—perfect for moving large volumes of air and fumes for ventilation. An additional outer wear-strip protects the steel-wire helix from external abrasions and drag, making it useful for outdoor usage. Its flexibility even extends to its ID tolerance, with the Tornado-Flex In-Sack Air Ventilation Duct offering -0.00 to +0.375 inches of tolerance. Ideal for temporary or permanent jobs, this hose has all the durability and compactability of a quality, portable-air-conditioner ducting hose.

Does the Exhaust Hose of Portable ACs Get Hot?

The air-conditioner exhaust-duct of a portable AC does get hot, as it is in charge of venting hot air and water vapor out of the unit. This task of moving warm air outside naturally means that your portable AC vent/hose will be warm to the touch. If your portable-air-conditioner exhaust-hose gets hot, that is part of the normal processes of your unit. However, how can you determine what is too hot for your portable-air-conditioner exhaust-hose? “Too hot” is a relative term that depends upon the person judging the temperature. For portable-AC exhaust-hose, very hot ductwork can actually affect the temperature inside of your room. If a portable AC hose gets hot, it can counter your intentions to cool your home. This makes the entire process of portable air-conditioning counter-intuitive. If the hot air being exhausted is affecting your portable AC’s cooling abilities, you may want to opt for insulated ductwork.’s HVAC Insulated-Flex Ducting is an excellent choice in ventilating your portable air conditioner while maintaining temperatures inside the hose. The HVAC Insulated-Flex is constructed of aluminum- and PET-film ply that is insulated with wool glass. This protective layer allows for the ducting of high and low temperatures while preserving the temperature of the air inside the hose.

This will ensure that none of the heat from the exhausted air leaks into your room, which would heat the area and counteract the cooling process. The HVAC Insulated-Flex, while maintaining internal temperatures, is also flexible and compressible like many of our other hoses at This will permit you to easily manipulate your hose to vent your unit’s hot air and moisture outside, allowing for the proper ducting of portable-AC exhaust. As a portable-AC exhaust-hose is usually hot, considering an insulated-duct option will be advantageous to your unit’s cooling.

Air Ventilator Black_Flex Shot

The size of a portable-air-conditioner vent/hose always depends on the specifications of your unit: its power, model, and manufacturer. Sizing of the portable AC exhaust-hose will be determined by its inside diameter, as well as its length. ID size can be measured by hand or found in your unit’s instruction manual. Typical portable-AC units come with an average 4-to-7-foot-long hose, with an approximately 5-inch ID. However, the length of your portable-AC hose can practically be at whatever length you require. Knowing the ID size of your hose is imperative to the care of your unit, as well as necessary in order to replace it. The hoses that come with your portable air-conditioner are not built to last. The ductwork you are looking for exhibits superb flexibility, durability, and resistance to harsh elements, and it should be in a variety of lengths and ID sizes so that no matter your requirements, you will be accommodated. Through this article, we hope you have learned about ID sizes and how to measure them, about the average length of hosing, and how longer ducts may be advantageous. Finally, we hope you have learned about the defining characteristics of an excellent, portable-AC exhaust-hose, and where you may find one.