Wisconsin weather is rough. In January and February, the frigid air hurts your face when you go outside and the furnace is working overtime. In July and August, you’re sweaty, and your home feels like a sauna without the AC cranked. The rest of the year is anyone’s guess!
What if there was a way to keep your home perfectly comfortable year-round without adding expensive ductwork or going bankrupt from your energy bills? That’s where mini split systems come in. These ductless heating and cooling units are gaining popularity among Wisconsin homeowners—but are they the right fit for your home?
Today we’re answering some of the most common questions we get about mini splits from our customers around the Fox Cities to help you decide if they’re worth the investment for your home.
- What is a Mini-Split System?
- Why Choose A Mini-Split System?
- Are Mini-Splits Efficient?
- Do Mini Splits Work in Older Homes?
- How Long Do Mini Splits Last?
- How Big of a Mini Split Do I Need?
- Are There Any Incentives for Installing a Mini-Split in Wisconsin?
- How Much Does A Mini Split System Cost?
- Are Mini-Splits Worth It?
What is a Mini-Split System?
A mini-split system is a ductless heating and cooling system that allows you to control the temperature in specific rooms or zones. These systems use an outdoor compressor unit and one or more indoor air handlers, offering flexibility and energy efficiency without extensive ductwork.
Why Choose A Mini-Split System?
Great question! Many Wisconsin homeowners choose a mini-split air conditioning system for improved energy efficiency, more control over their home’s heating and cooling, and lower costs. Some of the key benefits include:
- Save Money on Your Heating & Cooling Bills: Mini-splits let you zone your comfort, saving you money. You only pay to heat or cool rooms you’re using!
- No Ductwork Needed: Ductwork can be expensive. Mini-splits don’t need it, which makes it a convenient and affordable option for older homes, garages, and workshop areas here in Wisconsin.
- Peace and Quiet: Mini-splits are much quieter than traditional air conditioners and noisy window units so that you can relax without constant noise.
- Year-Round Comfort: Most mini-splits have both heating and cooling options, which is a must with Wisconsin’s crazy temperatures and weather fluctuations.
- Control Your Comfort, Room by Room: No more bickering over temperatures. Mini-splits allow for individual room temperature settings so everyone is happy and comfortable.
Are Mini-Splits Efficient?
Yes! Mini-splits are among the most energy-efficient heating and cooling options available. And they use technology to allow you to adjust output based on demand. For people without a ducted system mini-splits are more efficient than window air conditioners. Energy savings, comfort, and noise reduction — it’s a win-win.
Do Mini Splits Work in Older Homes?
Yes, mini-splits are a great option for older homes here in the Fox Cities area! Since these systems don’t require ductwork, they’re ideal for homes built before central HVAC systems were common. If you’re planning to remodel or update your home, they also work for additions, garages, basements, and other spaces that didn’t originally have heating and cooling.
How Long Do Mini Splits Last?
A high-quality mini split system can last 15-20 years with proper maintenance. Regularly cleaning your filters and annual inspections will keep your system running efficiently for years, making these a great long-term investment for your home.
How Big of a Mini Split Do I Need?
The size of the mini split system you need depends on the square footage of the space. The quality of your insulation and layout can also impact sizing.
Our team of experienced HVAC experts can help you find the right size mini-split, but here are some general guidelines to get you started:
- A 9,000 BTU mini-split unit can cover about 350 square feet
- A 12,000 BTU mini-split unit can cover up to 500 square feet
- A 18,000 BTU mini-split unit can cover up to 750 square feet
- A 24,000 BTU mini-split unit can cover up to 1,000 square feet
(BTU stands for British Thermal Units, which is used to measure heat.)
We recommend you get a professional assessment to ensure your mini-split system is properly sized for both heating and cooling. Oversized or undersized units can result in wasted money and uncomfortable nights when Wisconsin temps hit extreme highs and lows.
Are There Any Incentives for Installing a Mini-Split in Wisconsin?
Yes! Many Wisconsin utility companies offer rebates for installing energy-efficient heat pumps — including mini splits. You may also qualify for federal tax credits. Our team of experienced Wisconsin HVAC contractors and your local energy provider can help you find out the specific incentives for your home.
In general, Wisconsin homeowners will spend $2,000-$5,000 for a single-zone mini split (one indoor unit) and between $5,000-$15,000+ for a multi-zone system (multiple indoor units).
The cost of your mini-split system fluctuates based on the size, number of units needed, and installation factors such as electrical upgrades.
Keep in mind that while that upfront investment may seem big, these mini-split systems offer long-term savings due to their high efficiency. And rebates and tax incentives can help balance out some of the initial costs.
How Much Does A Mini Split System Cost?
In general, Wisconsin homeowners will spend $2,000-$5,000 for a single-zone mini split (one indoor unit) and between $5,000-$15,000+ for a multi-zone system (multiple indoor units).
The cost of your mini-split system fluctuates based on the size, number of units needed, and installation factors such as electrical upgrades.
Keep in mind that while that upfront investment may seem big, these mini-split systems offer long-term savings due to their high efficiency. And rebates and tax incentives can help balance out some of the initial costs.
Are Mini-Splits Worth It?
If you’re looking for an efficient, flexible heating and cooling solution for your Appleton or Oshkosh-area home, a mini split could be a great option. We have many customers in Northeast Wisconsin who absolutely love their mini-split system. However, it’s important to choose the right HVAC system that suits your home and your family’s needs. The experienced HVAC contractors at Martens Heating & Cooling in Omro can help you determine if a mini split is the best choice for your home.
Enjoy a More Comfortable, Efficient Home Today

If you have questions about mini-splits for your home in Northeastern Wisconsin or other heating and cooling solutions, the Fox Valley HVAC contractors at Martens Heating & Cooling are here to help. Let’s chat about how to make your home more comfortable and efficient.