A/C Charging Methods
Superheat Method for Fixed Oriface/Capillary Tube Indoor Units
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Cross Reference Guide
Product Reference Guide
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Unit Sizing Guide
What unit size is right for you?
Sources vary on how large a unit you should buy for a room of a given size, and experts say that factors such as multiple doors, sunny exposure and high ceilings will increase the Btu you need (air conditioner cooling is measure in British thermal units per hour). Consumer Reports magazine's estimates are on the low side compared to those offered by the United States Department of Energy. We've combined the two to give you a general air conditioner sizing guide. Calculate square footage by multiplying the length times the width of your room.