How to Tell What Size AC Unit You Need Whether you are looking for an air conditioner (AC unit) that fits in the wall, a window or a portable unit, you need to take the correct measurements of the room or rooms that the unit will cool. Using a smaller British thermal unit (BTU) appliance for the cooling area will result in constant running of the air conditioner and probably will not cool the entire area correctly. If you choose an AC unit that has more BTUs than what you need, you will waste energy. Determine what size AC unit you need before you do any shopping. Measure the room or rooms where you will use the AC unit. Measure the width and length of the room. If you are buying the unit for the entire home, you measure slightly differently. If measuring the entire house, measure from one end of the house to the other end for length and then measure one end to the other for width. Calculate your measurements into square footage. Multiply the length by the width to determine the square feet.

For instance, a room that is 13 feet wide and 15 feet long will equal 195 square feet. If you have two floors to cool, repeat the process for the second floor. Look at the BTU chart to determine the size of the air conditioning unit you need. Keep in mind that if you need more than 32,000 BTUs, a central air system is a better choice. If you have a two-story home and are not choosing central air, you will need a unit on each floor. Cold air does not rise. Add 10 percent BTUs if the room you plan to cool is a sunny room, unless you can use shades and blinds to block out the sun. If the room will have more than two people occupying it, add 600 BTUs to your total. If you are using a portable unit in a kitchen, add 4,000 BTUs for the heat generated from appliances and cooking. BTU Guide for an AC A central air conditioning unit is a large expense, ... What Ton Air Conditioner Do I Need? What Size Central Air for... How Many Tons Do You Need in an AC Unit? What Size Air Conditioner Should You Have in a 2000 Square Foot...

In a world experiencing global warming, air conditioners are something of a necessity. The proper size air conditioner impacts the life of... Installing an air conditioner can make a big difference in how comfortable a home is during the hot and humid dog-days of... How to Size AC Units. ... the "How powerful an air conditioner do you need?" worksheet calculator available on the Consumer Reports... How to Calculate Correct Central Air-Conditioning Unit Size. What Size Air Conditioner Do I Need for a 1,650 Sq. Ft. House?... Sizing your air conditioner is an important step for any home owner. If you purchase a unit that is too large, it... Window air conditioners are a convenient way to cool rooms that are not serviced by a central air conditioning unit. What Size Air Conditioner Do I Need for a 1,650 Sq. Ft. House? Room Size for a 24,000 BTU Air Conditioner How to Figure Out What Size Air Conditioner You Need How to Determine the BTU for a Room

How to Size a Window AC Unit How to Calculate AC RequirementsWho do I contact for air conditioning products and service? What do rating numbers mean? What is a SEER? What does HSPF stand for? What does AFUE stand for? Should outdoor units be covered in winter?how to tell the size of my ac unit Should a thermostat be set to "auto" or "on"?how much for a ac unit Can shrubs or flowers be planted around an outdoor unit?how to replace a home ac unit If an outdoor unit needs replacing, should the indoor unit be replaced too? How do I know what size unit our house needs? What is the difference between a split system and a package unit? How do I find a Rheem dealer? Who do I contact for air conditioning products and service?

For questions concerning new products, energy efficiency ratings, savings on your utility bills, or repair or replacement services, call your local Rheem dealer. He can answer all of your heating and cooling questions. The U.S. government requires an efficiency rating of all air conditioning and heating equipment. The rating reflects the percentage of energy used efficiently, with a high rating indicating high-efficiency. The next two topics address this issue in greater detail. There are special names for the efficiency ratings of various types of equipment. Air conditioning equipment is rated by the Seasonal Energy Efficiency Rating, or SEER. The higher the SEER rating, the more efficient the unit. There are special names for the efficiency ratings of varying types of equipment. Heat pump equipment in the heating mode is rated by the Heating Seasonal Performance Factor, or HSPF. The higher the HSPF rating, the more efficient the unit.Gas furnaces are rated according to their Annual Fuel Utilization Efficiency, or AFUE.

The higher the AFUE rating, the more efficient the unit.Rheem heat pumps operate year-round and should never be covered. Similarly, air conditioners that operate seasonally are built to withstand an outdoor environment and should not be covered.That way, the fan operates only when the temperature requires it. This is the most used and the most efficient setting. However, there are advantages to using the "on" setting. Air is constantly filtered through the unit's air filter, and the constantly circulating air results in an even temperature throughout the house.However, we recommend that plants be no closer than 18 inches to the unit. This allows for plenty of room for air circulation in and out of the unit. Without this room for air circulation, the unit could overheat, resulting in a premature need for service.Rheem air conditioning and heating units are designed to operate as a complete, matched system. The efficiency rating is based on the entire system. Replacing the entire system ensures the system will be reliable and efficient.