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How Much Does It Cost to Run a Mini Split Per Month?

How Much Does It Cost to Run a Mini Split Per Month?

Thinking about installing a mini split in your home or office but worried about the costs? We get it—adding or replacing a cooling system can be a significant investment. With the potential for hidden fees and ongoing expenses, it’s important to understand what you’re signing up for. That’s why we’re here to help!

In this guide, The Trade Table will break down the monthly operating costs of a mini split system, covering everything from electricity usage to maintenance, repairs, and installation fees.

Quick Review of Cost to Run a Mini Split Per Month?

Monthly Costs: A small 18,000 BTU mini split typically costs \$65 to \$105 per month in electricity.

Efficiency Matters: Higher SEER-rated units use less energy and lower operating costs.

Size Impacts Costs: Smaller units are cheaper to run than larger ones.

Location & Insulation: Proper placement and good insulation reduce energy consumption.

Professional Installation: Hiring a licensed installer ensures efficiency and avoids costly mistakes.

Operating Costs of a Mini Split System

The cost of operating a mini-split depends on several factors:

💰 Unit Size & Type: Larger or multi-zone units consume more power.

📍 Location: Climate conditions affect heating and cooling demands.

Energy Source: Electricity rates vary by region.

🔧 Maintenance Needs: Regular servicing prevents efficiency loss and keeps costs down.

Mini Split vs. Traditional HVAC: Which Saves More?

On average, mini splits are more energy-efficient than central HVAC systems. Their high efficiency ratings help lower energy costs, making them an excellent choice for long-term savings.

However, there are additional costs to consider, such as:

  • Heat pump installation for heating and cooling.
  • Professional installation fees (if not a DIY unit).
  • Potential repairs due to improper setup or lack of maintenance.

Understanding Usage Rate & Monthly Energy Costs 

What affects how much energy a mini split uses?

SEER Rating (Efficiency Level): Higher ratings mean lower electricity costs.

Run Time: Using the unit all day vs. only during peak hours affects costs.

Temperature Settings: Lowering the thermostat in winter increases electricity usage.

Humidity & Climate: Areas with extreme weather may see higher energy bills.

Are Mini Splits as Efficient as They Claim?

Most mini split units have a SEER (Seasonal Energy Efficiency Ratio) rating, which estimates energy savings. However, real-world performance can vary based on installation quality and environmental factors like humidity and temperature shifts.

To maximize efficiency and reduce operating costs, consider:

✔ Choosing the right BTU size for your space.
✔ Maintaining optimal thermostat settings to avoid overworking the system.
✔ Sealing windows and doors to prevent energy loss.

How to Calculate Monthly Energy Costs 

Use this simple formula to estimate electricity usage:

Amps = Watts ÷ Voltage

For example, if your mini split runs at 2,400 watts and operates on a 220V circuit, the amperage would be:

2,400W ÷ 220V = 10.9 amps

This helps determine the electrical requirements and the right circuit breaker size.

Estimated Monthly Energy Costs by Unit Size 

BTU Size Estimated Cost Per Month
9,000 BTU $40 – $75
12,000 BTU $50 – $85
18,000 BTU $65 – $105
24,000 BTU $80 – $140
36,000 BTU $110 – $180

 

Tip: A higher SEER rating can reduce these costs significantly over time.

Installation Costs for a Mini Split System 

Installing a mini split can range between \$2,000 and \$7,000, depending on:

📌 Unit Size (Single-zone vs. Multi-zone)
📌 Installation Complexity (Wall-mounted vs. Ceiling Cassette)
📌 Labor Costs (Professional installation vs. DIY setup)
📌 Local Permit Requirements

DIY vs. Professional Installation: What’s Better?

DIY Mini Split:
✅ Cheaper upfront cost
✅ No professional fees
❌ Requires electrical & refrigerant knowledge
❌ May void warranty if installed incorrectly

Professional Installation:
✅ Ensures compliance with local codes
✅ Avoids installation errors that reduce efficiency
Warranty protection
❌ Higher labor costs

Pro Tip: If you're not experienced with electrical wiring and refrigerant handling, hiring a pro is the safest choice.

Minimizing Operating Expenses for a Mini Split System 

Choose a High SEER Rating – The higher the SEER, the lower the energy cost.

Use Programmable Thermostats – Set schedules to avoid running the unit unnecessarily.

Maintain the Unit Regularly – Clean filters and remove debris from the outdoor condenser.

Improve Home InsulationSeal leaks to reduce energy waste.

Choose the Right Size – Avoid oversizing or undersizing your unit.

Frequently Asked Questions on Cost to Run a Mini Split Per Month?

How much does it cost to run a mini split per month?

The monthly cost varies based on unit size and usage but typically ranges from $65 to $180 per month.

Does a mini split use a lot of electricity?

Mini splits are more energy-efficient than central HVAC systems, using less power while providing targeted cooling and heating.

Will my electricity bill go up with a mini split?

If you’re replacing inefficient heating or cooling systems, your bill may decrease. However, adding a mini split as an additional cooling source will increase your energy bill.

Are mini splits cheaper than central air?

Yes! Mini splits avoid the energy loss associated with ductwork, making them a cost-effective option for many homes.

Do mini splits work in extreme temperatures?

Yes, but cold-climate models perform better in sub-zero conditions. Standard units may struggle in freezing temperatures.

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