Yes, this way the ac does not have to run your bill up to cool areas that do not need it. However, if it is humid and wet in the basement, you should run the air conditioner periodically to recirculate the air and reduce the amount of humidity down there.
The best way to clean air conditioning ducts or vents, is with a feather duster. If you don't have a long enough one, you can tie it to your broom handle,or use a broom.
They should last as long as the house if they don't get wet.
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.
That really depends on whether or not there are ducts already in the house. If there aren't, then you have to pay for those also. With ducts already installed, it will be around $3,000. If you have to install ducts, you are looking at $10,000.
Foil and Fiberglass Duct Insulation is best.
It varies for each home. A manual J, D, & S should be performed to determine the amount/size of ductwork that is needed.
Ducts are used in heating, ventilation, and air conditioning (HVAC) to deliver and remove air. Yes, an air conditioning duct is important and vital to your safety. Air conditioning duct helps remove carbon dioxide.
A ductless air conditioning system is exactly what the name implies. An air conditioning system without ducts. The air handler is usually mounted on an interior wall or ceiling.
There could be a number of problems. Dirty ducts or heat exchanger. Wrong speed on the fan, or turning the wrong way. Plugged filters or vents.
The answer is that "it depends". If the attic isn't insulated, put it in the basement to save on heating/colling costs. If your basement has a tendency to get damp, put it in the attic or you'll risk blowing mold and mildew around in a few years. Whatever area you put it in, make sure the ducts are well insulated.
Mr Duct Heating and Air Conditioning, Air Ducts Done Right, Four Seasons Heating and Air Conditioning are all companies that are based in Chicago that install ducted air conditioners.
To conserve energy I would buy one conditioning unit but add more ducts through out the house. It would save energy and it would save more money on installation.