If you're willing to look online and pay shipping, Amazon.com, Newegg.com, Fry's (frys.com) and Best Buy (bestbuy.com) all have a good selection for "portable air conditioner". If you want a brick and morter store, Fry's has locations throughout California and in other major midwest-west cities (http://www.frys.com/ac/storelocator/index.jsp), and some Best Buys and Sears stock them.
Any store that specializes in Home Improvment will offer the most variety and selection.
Portable air conditioner units can be purchased from a number sources online. Sites like Home Depot, Lowe's, and Walmart are just a few of the many sites that sell this type of air conditioner.
Portable air conditioners are not expensive to buy, but they are more expensive to run than a whole house air conditioner. However, if your house does not have central air, a portable air conditioner is a good alternative.
If you are needing something quickly, it would be best to buy it from Lowes. Walmart sometimes carries them. If you are willing to have it shipped, try amazon.com.
There are many places to consider when buying a portable air conditioner. You might have luck finding one on Craiglist, in the local Thrifty Nickel, or int he newspaper. Some other more expensive alternatives might include Best Buy, Sears, Home Depot and Lowe's.
I always seem to buy the worst air conditioner on the market. Where can I find reviews on the best air conditioner to buy?
Amazon and Ebay may have a variety of portable air conditioners. You can also try the websites for stores like Walmart and Target, which will also offer a lower price than other online retailers.
You could buy a new air conditioner unit at home depot. They offer lots of air conditioner units at great prices and the air conditioner units are built to perform.
You can buy an traditional air conditioner, and fix solar panels on the roof,then use solar panels supply the air conditioner.
It is possible to buy an air conditioning duct separately from an air conditioner. A great place to start looking is at www.ductworks.net/This site has a wide variety of air conditioner ducts.
I don't think you can buy a 4000 volt air conditioner.
You can buy portable air conditioners from www.walmart.com. They have a variety of different brands to buy from and are a very reputable site. They are very trustworthy when it comes to air conditions.
The cost of such an air conditioner varies depending on the brand and time of purchase. Currently, such an air conditioner can be purchased for around $180.