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There are several reasons why the system should be proportionate to the room size:Ĭomfort – An underpowered unit might not be enough for the space, or may struggle if there are additional occupants in the room When it comes to mini splits, bigger isn’t always better.

The Importance of Proper Mini-Split Sizing Here we’ll help you find the ideal mini split size based on the specific dimensions of the rooms that need cooling. However, the system is only as good as the size - too big and you risk wasting power and utility bills too small and it might not do the job sufficiently. This could also raise your energy bills while creating hot and cool spots throughout your home.A ductless mini split system is an ideal way to heat and cool several areas of your home in one convenient and energy-efficient package. The air conditioner may continuously run to try to achieve a certain temperature that it can’t reach. If you get an air conditioner with too few BTUs, the unit likely won’t be able to completely cool your space. This could create a hot, humid feeling in your house. It would likely run for short periods of time, which could prevent the air from being properly cooled. Since it has more power than what’s needed for the space, the AC unit may not run efficiently and could end up wasting energy. If you get an air conditioner with too many BTUs compared to your home size, you may see an increase in your energy costs. Multiply the square footage of your space by 20 to figure out how many BTUs your air conditioner would need to cool the area. This can apply to an entire house or a single room. Typically, an air conditioner needs 20 BTUs for each square foot of space that it’s working to cool. It’s important to leverage BTUs for the size of the space you want to keep cool. These calculations can be helpful when determining the cost of an air conditioner beyond the sticker price of the unit.ĭo you need more BTUs for better cooling?

Energy Information Administration.Ĥ39.5 kWh x 0.14 cents = $61.53 in monthly energy costsĬonverting BTU to kilowatts allows you to understand how much energy an air conditioner will use in your home and how much that will cost you each month. was 0.14 cents per kilowatt-hour in November 2021, according to the U.S. The average price for electricity in the U.S. Next, you can multiply kilowatt-hours by the local electricity rate. For the 10,000 BTU air conditioner we used in the earlier example, this is what the math would look like if the unit runs for 5 hours each day:Ģ.93 kW x 5 hours = 14.65 kWh (kilowatt hours) per dayġ4.65kWh x 30 days in one month = 439.5 kWh per month First, determine how many kilowatts your air conditioner uses each day.

You can take the calculation a few steps further to estimate your energy costs. Using the example above, 10,000 BTU would equal 2,930 watts. If you’re looking to convert BTU to watts, you would multiply the number of kilowatts by 1,000. Here’s what the BTU to kilowatts calculation would look like for a 10,000 BTU air conditioner: There are 0.000293 kilowatt-hours in one BTU. A kilowatt-hour tells you how much energy an appliance, such as an air conditioner, needs to operate for one hour. To convert BTU into kilowatts, which measures how much energy an appliance needs to operate, you would need to multiply your BTUs by the amount of kilowatt-hours in a single BTU.