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.I'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.Learn 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. These 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.Window air conditioners or central air aren't the only ways to cool down a hot house. Check out these alternative solutions from the team at The Family Handyman.ac units for rent Whole-House FansWhole-house fans may seem old fashioned, but they're enjoying renewed popularity. air conditioner in room without windowsThe idea behind them is simple: A powerful fan draws cooler early morning and evening air through open doors and windows and forces it up through the attic and out the roof vents. car ac repair parts

This sends hot air up and out, cooling your house and your attic. These fans are commonly mounted in an upstairs stairwell or hallway ceiling where there's at least 3 ft. of clearance above the fan.They use 90 percent less energy than an air conditioner, and in dry climates with cool mornings and evenings, they can actually replace your AC system.With a helper and basic tools, you can install a whole-house fan in a weekend.Main DisadvantagesThey can't cool inside temps any lower than outside temps and they can't dehumidify.They can make allergies worse. Whole-house fans draw in outdoor pollen and dust.Larger fans move air quickly, but they cost more to purchase and install. They also require significant attic ventilation and make more noise than smaller attic fans.For the best results, match the fan size to your floor plan, cooling needs and available attic ventilation. Call your local utility and check energystar.gov to see which models qualify for local rebates and the federal tax credit in 2010.

Fans cost $200 to $1,200.Portable Air ConditionersPortable air conditioners are similar to window units in operation. They sit on the floor (on casters) and use an adapter kit to vent the hot air through a hose running through a window, a wall, or a sliding glass door.Main AdvantagesThey're easy to install and use.You can move them from room to room.Main DisadvantagesThey're almost twice as expensive and use more energy than a similar-size window unit with the same cooling capacity.At this time there are no Energy Star–qualified portable room air conditioners.Portables range in price from $300 to $1,500 depending on the size, features, and efficiency.Mini-Split SystemLong popular in Europe and Japan, a mini-split system air conditioner (sometimes called ductless AC), is a hybrid of central air and a window unit. A small condenser sits outside and connects through a conduit to an inside evaporator mounted high on the wall or ceiling.The condenser sits outside, it doesn’t let in street noise, and the indoor fan is whisper quiet.

The system can be mounted anywhere thanks to the small size of the indoor and outdoor components. The conduit, which houses the power cable, refrigerant tubing, suction tubing, and a condensate drain, runs through a 3-in. hole hidden behind the indoor evaporator.Zoning flexibility lets you cool rooms individually.Professional installation costs $1,500 to $2,500 including parts and labor. You can install it yourself, but it's fairly complicated and you'll most likely void the manufacturer's warranty. Systems with an efficiency rating of 16 or higher qualify for the federal tax credit in 2010.In-Wall AC UnitAn in-wall air conditioner is basically the same as a window unit. The primary difference is that it has vents on the back instead of along the sides and it sits flush or extends only slightly farther out from the exterior wall. Main AdvantagesPermanent installation means you don’t have to lug it in and out twice a year, and it’s not an easy entry point for burglars.It doesn’t block a window.

The chassis unit sits securely inside a metal sleeve that is installed into the wall. The chassis unit slides out for easy servicing.The size of the unit isn’t limited to a standard window opening, so it can be bigger and more powerful than a window unit.Main DisadvantagesInstallation is more involved. Cutting a hole in the outside wall of your home may be difficult depending on the exterior sheathing of your home.You may need to install a new electrical circuit. Some larger units require 240 volts (although most smaller units can be plugged into a standard 120-volt outlet).Energy Star-qualified models use 25 percent less energy than models made before late 2000. Check with your utility for energy rebates. Some units provide both cooling and heating. Prices range from $400 for cooling a 400- to 700-sq.-ft. room to $700 or so for cooling/heating a 1,000- sq.-ft. space.Ventilator FanIf you have a hot room in an otherwise comfortable house, you can pump existing cool air into that hot room using a special fan installed in the wall or floor.

Main AdvantagesNo extra cooling costs. The level-to-level ventilator fan (shown) moves existing cool air from one level (from the basement or a mini-split system, for example) to another level of the house through an adjustable sleeve installed through the floor/ceiling.A ventilator fan can blow conditioned air up or down, depending on the position of the blower unit. There are also room-to-room ventilator fans to move the conditioned air.Main DisadvantagesTo install the fan, you’ll have to cut a hole through the floor/ceiling and run an electrical line to the unit.It’s only practical if you have an abundance of existing cool air that’s easily accessible to your hot room.Level-to-level ventilator fans (around $200) can also be used to move warm air through the living space during the winter. Search online for “level-to-level fan.”Duct or Vent Booster FanIf you have forced-air cooling but there's still a room that's hotter than all the rest, a duct or vent booster fan can increase the flow of cool air into that room.

Two types of booster fans are available. An in-line duct booster fan fits inside the duct of the room you're trying to cool. You mount the fan near the outlet and it automatically kicks on when your cooling system runs. Vent and register booster fans sit directly on top of or replace ceiling, floor, or wall registers. Depending on the model, you can set it to operate automatically, control it with a switch, or operate it by a remote control.Main AdvantagesEasy to install and use.In-line duct booster fans are available in both plug-in and hard-wired models and retail for $30 to $150. Vent and register booster units plug into a nearby electrical outlet or can be hard-wired. Register and vent duct booster fans cost $40 to $100.Main DisadvantagesLess powerful (and cheaper) in-line units have a lighter-gauge housing that is more prone to rattling.Duct or vent booster fans may not make a significant cooling difference if your ductwork or overall cooling system is inefficient, sized improperly or faulty.