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Mini Split for 1500 Sq Ft

You need an efficient cooling and heating system for your 1500-square-foot home that won't break the bank. A ductless mini-split system is an ideal solution that provides personalized temperature control for each area of your house.

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How many BTU do I need for 1500 sq ft?

For a 1500-square-foot home, a good rule of thumb is to choose a mini-split system with 24,000 to 30,000 BTU of cooling power. This size range will allow for adequate temperature control and even cooling throughout your living spaces. It will also provide enough capacity for warmer summer temperatures. Some highly rated options in this range include:

Square footage

  • As a general rule, you will want 20 to 30 BTU for every square foot. So for 1,500 square feet, 24,000 to 30,000 BTU should work well.

Ceiling height

  • Higher ceilings require more BTU to cool efficiently. Add about 10% more BTU for every foot over the standard 8 feet.

Window size

  • More or larger windows mean more heat gain, so increase BTU capacity by about 10% for every additional 10 square feet of window space.


  • Well-insulated homes are easier to cool and may require slightly less BTU. Poorly insulated homes may need up to 50% more cooling power.
This is a great Mini Split for 1500 Sq Ft

What Size Mini Split for 1500 Sq Ft 

To properly cool 1500 square feet with a mini-split system, you'll want to choose a unit with enough capacity for the size of your space. For 1500 square feet, a unit with at least 18,000 to 24,000 BTUs should work well for most homes. However, there are a few factors to consider:

The number of rooms

  • More rooms mean more BTUs needed to distribute cool air throughout your space. If you have an open floor plan, you may be able to get away with a smaller unit. If you have a multi-level home, you'll likely need a more powerful unit or multiple units.

Window placement

  • Lots of windows, especially windows that get direct sunlight, will require a higher-capacity unit to overcome the heat gain. Consider window treatments that block solar radiation to improve efficiency.


  • A well-insulated space is easier to cool and heat, so you may be able to use a smaller unit. Check your attic and any exposed ductwork for proper insulation. Caulk and weatherstrip around windows and doors to reduce air leaks.

Local climate

  • Hot and humid climates require more cooling power. If you live in an area with extreme heat, choose a unit rated for your hottest expected temperatures.

Estimating the Cost of a New AC Unit for 1500 Sq Ft

To determine the cost of a new AC unit for a 1500-square-foot home, several factors need to be considered.

Size of the Unit

  • The size of the unit will be a primary factor in the overall cost. For a space of 1500 square feet, a unit with a capacity of around 2 to 3 tons is typically recommended. Units in this range will cost between $2,500 to $5,500 depending on the brand and specifications. More powerful units, around 3.5 to 5 tons for larger homes, will cost $3,500 to $8,000 or more.

Type of the Unit

  • The type of unit is also a key determinant of price. Central AC units that cool the entire home tend to be more affordable, ranging from $2,500 to $5,500 for a 1500 sq ft house. Mini split units with wall-mounted air handlers in each room are more expensive, from \$3,500 to \$8,000 or higher for multiple zones. Ductless mini splits are a good option if installing ductwork is not possible.

Energy Efficiency

  • Energy efficiency is an important consideration as it impacts both upfront costs as well as long-term energy usage. Higher efficiency units, especially those with a Seasonal Energy Efficiency Ratio (SEER) of 16 or more, may cost 10-15% more but can save 20% or more on annual cooling bills. This can translate to thousands in savings over the 10-15 year lifespan of the unit.

Installation Fees

  • Installation fees will also increase the total costs. For a typical install, you can expect to pay between $500 to $3,000 depending on the complexity of the job and local labor rates. Permits and any necessary electrical work or duct installation/replacement will also add to the total price.

How Many Ton ACs Do I Need For 1500 Sq Ft?

For a 1500-square-foot space, a common guideline suggests that you might need an air conditioning (AC) unit with a cooling capacity of approximately 2.5 tons.

Has Anyone Mini Split an Entire House That’s Around 1500 Square Feet?

It's a fairly common practice. Typically, you would install multiple indoor units, such as one per bedroom and one or two for the rest of the house. The specific number of outdoor "splits" required on the house layout and the chosen locations for the indoor units.

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