Updated If you're looking for a portable air conditioners without a hose or window exhaust, then what you want is an evaporative air cooler (also called a swamp cooler or wet air cooler) which is basically a device that cools the air by evaporating water. Here are some good ones. These require water and with some units, you can even add in ice in order to cool the air down even faster. It works by sucking in the warm air in the room and cooling it down before blowing it back out. This results in a temperature drop.These air coolers won't cool your room down as much as regular air conditioners so if your home/room gets really hot, it's best to get a regular AC unit. The good thing about the air coolers is that it uses less electricity than ACs since they don't use energy hogging components like compressors. This means you get to save money because as you probably already know, traditional ACs can run the electricity bill up by a lot.There are a lot of evaporative air coolers to choose from varying in strength and coverage in terms of how much square feet of the room it will cool down, how much water it can hold, and other options like varies speeds.

These can be used indoor or outdoor and have caster wheels under them for easy portability.There are different models for different room sizes such as the one pictured below, made for medium to large sized rooms.samsung window ac buy onlineI'd say if you're looking for something that will cool your room down more than a fan would but not take up so much energy or require you to stick part of the unit outside or run a hose outside, then an evaporative air cooler is the way to go.central ac units comparisonLearn more about evaporative air coolersManufacturer of pictured item: HoneywellWritten There are no ventless air conditioning units currently available, but there is an alternative called an Evaporative Air Cooler. how a hvac system worksThese units cool the air by evaporating moisture through a material that is kept wet by being partially immersed in a tank of water within the unit.

A fan blows air through the material, evaporating the moisture, and creating cold air that can reduces the temperature in the room. Because there is no refrigeration process, there is no exhaust air, and therefore, no vent is needed.It also uses less power than an AC unit, so you could save some money on your electricity bill in the long run.This Honeywell model is pretty solid. Written So far as I know there is no such thing as a portable or room sized air conditioner that works without exhausting the heat removed from room air to some outside space, usually the great outdoors. There are larger units, commercial units, non portable, that can dump excess heat into water in a tank or other reservoir, with the water eventually being replaced with cold water via plumbing.So called swamp coolers or evaporation coolers are NOT AIR CONDITIONERS.BUT they do work rather well IF the humidity of the ambient air is LOW. They work GREAT in a low humidity desert environment for instance. But the savings on electricity are partially offset by the use of lots of clean fresh water, which can be pretty expensive in a desert environment.

They are basically just about entirely worthless on a hot MUGGY high humidity day.I live in a place where hot days are usually also quite humid, and know maybe half a dozen people who have given evaporative coolers a try. All of them took them back to the store for a refund.The reason they won’t work on a humid day is that water will not evaporate very well or quickly into air that is already loaded with moisture.DO NOT BUY A SWAMP COOLER EXPECTING IT TO WORK IN A HUMID CLIMATE.KEEP YOUR COOL ON HOT SUMMER DAYS Portable air conditioners provide comfort and flexibility when window installation is not permitted. FAQ About Portable Air Conditioners Looking for a way to keep cool while indoors during the summer? A portable air conditioner could be just what you're looking for. It offers incredible flexibility, letting you move the unit around so you can stay cool anywhere in your home. Check out these frequently asked questions about portable ACs and what you should consider when buying one.

What is a portable air conditioner? A portable air conditioner (AC) is a compact air cooling system that can be moved from room to room. They're ideal for use in rooms with no window or a room where you're not able to install a window air conditioner. What should I consider when buying a portable AC? When you're talking about the cooling capacity of an air conditioner, you're talking BTUs or British Thermal Units. The number of BTUs you need to cool a room depends on the size of the room. Generally speaking, a 450 sq. ft. master bedroom will require about 10,000 BTUs, while a 350 sq. ft. den or home office will need about 8,000 BTUs. Keep in mind that you don't want to get a unit that is underpowered, because the small air conditioner won't be able to effectively cool the room and will likely be constantly running. Conversely, a unit with too many BTUs will cycle too quickly without properly removing the humidity in the room. Water collection and removal system

As part of the cooling process, portable air conditioners remove humidity from the air. The water that's collected is either evaporated into the hot air exhaust or collected inside an interior bucket. Depending on the portable AC you buy, you may need to empty the bucket often. If you live in a humid environment, consider a unit that can also be used as a dehumidifier. A portable AC unit is great for a room that doesn't have a window or one that has a window but won't support a window AC. But, window or not, you need to vent the hot air somewhere to cool the room. This is usually done through an exhaust hose that vents the hot air out a sliding window or door, into a drop ceiling, or through a wall. Many portable ACs come with sliding window/door venting kits, and some will come with drop ceiling kits as well. Fans and compressors make noise. Since a portable air conditioner has both, it's going to make noise. Decibel levels for portable ACs typically range from 50 to 60 dB, which is louder than a refrigerator hum but quieter than a vacuum.