Even in air conditioning, size matters. When buying a 5000 BTU air conditioner, the most common question is this:
How many square feet will a 5000 BTU air conditioner cool?
The short answer: About 150 sq ft.
But here is the interesting part:
According to the EPA’s rule of thumb role, 5000 BTU room size should be 250 sq ft.
If you have a 150 sq ft room to cool, 5000 BTU will be more than enough.
However, EPA in their rule of thumb specifically recommends that we should calculate:
“20 BTU of cooling output per 1 sq ft.”
If we use this rule, we get the above stated 5000 BTU room coverage:
5000 BTU room size = 5000 BTU / 20 BTU per sq ft = 250 sq ft
So, how many square feet does a 5000 BTU air conditioner actually cool?
The 150 square footage coverage actually comes from the Energy Star air conditioner room sizing guide which states the following:
“5000 BTU air conditioner can cool a 100 to 150 sq ft room.”
Energy Star guidelines for 5000 BTU AC room sizing also recommends that you:
- Increase capacity for a room with high sun exposure; +10% cooling output. That would reduce the 5000 BTU AC room size to 90-135 sq ft.
- Decrease capacity for a room with low sun exposure; -10% cooling output. That would increase the 5000 BTU AC room size to 110-165 sq ft.
- Adjustments for more than 2 people and kitchen are not really relevant for this smallest size of air conditioners.
Air Conditioners With 5000 BTU Cooling Output
Once you answer how big of a room will 5000 BTU AC cool, you should find the best 5000 BTU air conditioners.
Window air conditioners.
You can check the list of the best 5000 BTU window air conditioners here.