Quote:
Originally Posted by Vicomte 
Does anyone have recommendations for the portable type with the exhaust hose? I wanted to get one last year, but most of the reviews I read on the net were hardly flattering, and they can be quite expensive. I live in a condominium with windows that open to the side, so the standard window units are impossible to use physically as well as legally. I have central AC, but it doesn't do bollocks on the second floor. I only need to cool my bedroom with it, so it doesn't need to be ridiculously powerful.
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Having central A/C there are some things you can do to improve the units efficiency. These are:
1. Go to the condeser unit (ussually a box with a fan that sits on a concrete pad besides the house. Check that the copper pipes carrying the condensed refrigerant (ussually R22 or R12 if an older unit) are covered with insulation. If not go to Home Depot (or similar) and install the insulation at least on the line carrying the condensed refrigerant from the condensing unit to the evaporator inside your house. Trim any trees/bushes/grass surrounding the condensing unit so it works better. Next while at it TURN THE UNIT OFF and use a hose with a nozzle to remove as much of the dust/dirt that has accumulated on the cooling fins, this will help dissipate the heat. The cleaning is enhanced if you use a coil degreaser which can be bought at a hardware store. Finally you could check the pressures to make sure your unit is fully charge, for this a technician would be your best bet.
2. With the unit still off go to the evaporator (inside the house inside the air handling unit, by the squirrel cage) and see how clean or dirty it is. Use a brush to remove the excess buildup (carefull not to bend the fins). Then spray using a coil cleaner/degreaser. Make sure the coil cleaner/degreaser is the type that is self removing with the condensate generated at the coil (while the A/C is working).
3. Replace the filter regularly. If a plain filter monthly if a high efficiency and longer use then every 3 months.
4. If an area of the house is always cold while another hot use the vents to open or close them as needed so you can redirect the air to an area as needed.
5. If you have leaks around the windows fix them, you will be amazed how much this step along will help.
Good luck.