Why Do Btus Matter?

BTU basics
A measure of an air conditioner's power is its BTU rating. BTUs are the energy used to remove heat from a room. Therefore, the more BTUs an air conditioner unit has, the better equipped it is to cool a larger space.

Is the higher the BTU better or worse?

BTU - British Thermal Unit - BTU is a very common term when it comes to HVAC equipment. One BTU is the amount of energy it takes to raise one pound of water one degree Fahrenheit. The higher the BTUs, the more power the system has.

Should I get more BTU than needed?

Air Conditioner Size And Cooling Ability

If your air conditioner has a bigger BTU rating than the room size needs, it will cycle off too quickly, waste energy, and will not adequately dehumidify the space. So a higher BTU than needed is definitely not recommended.

James H. Sterling

James H. Sterling

Environmental Science & Climate Journalist

James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.