Don't overload extension cords by plugging in appliances that draw a total of more watts than the rating of the cord. Use special, heavy duty extension cords for high wattage appliances such as air conditioners, portable electric heaters, and freezers. When using outdoor tools and appliances, use only extension cords labeled for outdoor use.
Using the properly sized room air conditioner is important for comfort and efficiency. Buying too large a unit will chill the air without removing humidity, leaving you feeling cold and clammy. Talk to your dealer to determine the right size for your needs.