Narrowing down to the right type of AC system is an essential first step when finding a solution to rising heat problems in your home, office, workshop, or complex. But how are you supposed to know if a portable air conditioner or a mini-split AC is the best system to meet your air conditioning expectations?
The best way to know is to identify what kind of space needs climate control, and what your cost, installation, and performance expectations are. In this Portable AC vs Mini-Split: Cost and Performance Comparison guide, we will break down exactly what you need to know about each system and everything you can expect from installation, cost, long-term operation, and maintenance.
Mini-Split Vs Portable Air Conditioner: Quick Comparison
What’s the Difference? Portable AC Vs. Mini-Split AC
While mini-split systems and portable ACs may look like they are one and the same, they are designed for completely different spaces and usage levels. Which is why it's so important to know exactly what you need from your air conditioning system. For a breakdown on when a portable air conditioner or a mini-split is best used, take a look at our Ductless Mini-Splits vs. Portable Air Conditioners application comparison guide.
What's a Portable AC?
A portable air conditioner provides supplemental cooling and sometimes heating to specific spaces or rooms to bolster an existing whole-home AC system. Designed as a compact and temporary solution, they are made for easy maneuverability, do-it-yourself installation, and lower upfront costs. Portable ACs work best as a temporary and supplemental cooling solution during peak hot seasons in living rooms, bedrooms, and offices. Take a look at the portable air conditioner buying guide to help select the best one for your needs.
What’s a Mini-Split AC?
A Mini-Split Air Conditioning System is a permanent cooling and heating system for single rooms or for multiple rooms, making it an alternative to whole-house AC systems. Ducted Mini-split systems are most similar to traditional whole-home AC systems since they require existing or new ductwork and are practically invisible, with only vent-like air handlers in each room. Ductless Mini-Split systems are a less invasive but just as permanent alternative that doesn’t require any ductwork, with the most invasive part of installation being a hole for the lineset connection from the Indoor air handler to the outdoor compressor.
Both systems are great primary cooling systems for homes, offices, workshops, garages, and sunrooms. For a more through break down of each type of mini-split, take a look at the Ductless Mini-Split Air Conditioner Buying Guide and the Ducted Mini-Split AC Buying Guide.
Cost Comparison: Mini-Split AC Vs. Portable ACs
Upfront Costs
Portable Air Conditioners
Portable Air Conditioners typically have lower upfront costs, which can increase based on the coverage area of the AC, but they usually don’t require any additional upfront costs. Since they are made for easy residential use, the setup consists of venting the AC to a window with the included window exhaust kit for ventilation and plugging the unit into a power source. Most portable air conditioners include a window kit for a sliding or double-hung window, but it is important to double-check that the included kit will fit the window in your space.
The only additional cost that may occur is the purchase of specialized window exhaust kits for installation into less common window types, like crank-out, casement, awning, and hopper windows, if the portable AC is not designed for those specific window types. Other accessories may also be needed for more commercialized spaces, including specialized intake and exhaust hoses and adapters.
Mini-Split Air Conditioner
Mini-split ACs' initial cost can vary depending on whether it’s ducted or ductless, and upfront costs can increase based on room coverage and the number of air handlers. These systems often require additional costs, including professional installation (unless designed specifically for DIY installation) and additional hardware and accessories like ducting if it doesn’t exist in the applicable area, line sets, and other installation accessories.
Operation Costs
Long-term cost will entirely depend on a couple of factors: the efficiency, maintenance and servicing costs, and longevity of the Air conditioner.
Efficiency Costs
Mini-split systems, specifically ductless mini-splits, typically have the best efficiency, meaning they use less electricity to provide more temperature control. Compared to portable ACs, they use less electricity in the long run and are capable of controlling the climate in larger, more compartmentalized spaces.
Longevity
Portable ACs typically don’t last as long as mini-split systems since they are designed for seasonal operation with a portable design. Portable ACs can last for around 5 to 10 years when regularly maintained and properly handled, while mini-split systems can last from 10 to 20 years when installed correctly and maintained and serviced regularly.
Maintenance and Servicing
Overall, mini-splits and portable ACs are fairly equal when it comes to maintenance costs and servicing. They both are designed to require little maintenance, utilizing washable filters and requiring regular dusting. However, mini-splits do require yearly servicing to flush out drain lines to prevent blockages that cause leaks and check refrigerant levels to ensure optimal performance.
A Portable AC Requires:
- Regular filter cleaning (typically a washable filter, keeping costs low)
- Condensate tank emptying at least once or twice a day, unless hooked up to a gravity drain or condensate pump.
- Dust the air vents
A Mini-split Requires:
- Regular filter cleaning (typically a washable filter, keeping costs low)
- Wipe air handler coils
- Clean the compressor blower wheel
- Yearly servicing to check refrigerant lines and flush the condensate drain.
Installation Considerations
Efficiency and Performance Comparison
Portable Vs Mini-Split Air Conditioners' Efficiency
Mini-splits tend to be overall more efficient than portable ACs, largely due to their permanent installation, which allows for better insulation and more complex setups. The efficiency and performance capability of mini-split systems will largely depend on the number of air handlers, refrigerant, brand and series, and whether it is a ducted system or a ductless system. While the efficiency of a portable AC will depend on how large a space the system covers and the technology in the unit.
The best indicator of how efficient an air conditioner is for year-round operation is the SEER2 (Seasonal Energy Efficiency Ratio 2) rating for mini-split systems. The EER2 (Energy Efficiency Ratio 2) rating found in the specifications for both mini-splits and portable ACs indicates its efficiency in the hotter seasons. Understanding what the difference is between the two metrics is important.
SEER2 is a testing method mandated by the U.S. Department of Energy for HVAC systems that shows how efficiently a system runs at 65 degrees to 104 degrees Fahrenheit. This testing method is typically more accurate for real-world operation, as it is tested on multiple temperature ranges to be more accurate.
EER2 is a testing method mandated by the U.S. Department of Energy for air conditioners, showing how efficiently an AC operates at 80 degrees Fahrenheit with 50 percent humidity.
Portable air conditioners' EER2 rating ranges from 28 to 14.7, while mini-splits' SEER2 ranges from 12.5 to 33.3 for ductless systems and 15.2 to 21 for ducted systems.
Portable Vs Mini-Split Air Conditioners' Performance
There are many performance metrics to consider that will affect how well an air conditioner fits into a space, including the operational temperature range, sound levels, and CFM. For more information about
Operational Temperature Range
This is the range of temperatures that an air conditioner can efficiently operate within.
- Portable Air Conditioners: Operate in 0 to 110 degrees F. Unreliable in indoor/outdoor environments or as a primary cooling solution. Great as supplemental cooling solutions indoors
- Mini-Split Systems: Operate in -22 to 131 degrees F. (Varies on the brand or type of system) Great primary air conditioning solution for indoor and semi-indoor spaces like workshops and sunrooms
CFM
CFM, or Cubic Feet per Minute, is a metric that measures how many cubic feet of airflow pass in one minute, which determines how quickly an air conditioner can push out fresh and conditioned air.
- Portable Air Conditioners: 725 to 2,400 CFM, making them ideal for smaller residential spaces.
- Mini-Split Systems: 235 to 4,503 CFM (ductless) and 335 to 5,700 CFM (ducted systems), making them more versatile for small and larger spaces.
Sound levels
Noise levels are an important factor when looking for a cooling solution for your space because while you want to feel a difference in your space, you don’t want to hear it.
- Mini-Split Systems: Quieter, typically 29 to 79 dB of noise. Consist of the indoor air handler and outdoor condenser, with the noisiest part being the condenser.
- Portable Air Conditioners: Single-unit AC located inside the space and will generate around a maximum of 42 to 74 dB.
Frequently Asked Questions
Is a mini-split cheaper to run than a portable air conditioner?
Yes, based on the efficiency ratings, mini-splits are usually cheaper to run than a portable air conditioner. However, these systems typically have a higher upfront cost or installation cost that you should be aware of.
Can a portable AC cool as well as a mini-split?
For single zones, yes; for other spaces, maybe not. The best portable ACs cool almost as well as a mini-split in a smaller single room, but for larger rooms or homes with multiple rooms, a mini-split definitely provides a more even cooling solution.
How long does each system typically last?
The life span of your AC is largely dependent on the quality of the brand and how well it’s installed, maintained, and serviced, but a mini-split typically lasts somewhere between 10 and 20 years, while a portable AC can last between 5 and 10 years on average.
Can renters install a mini-split?
Mini-splits could be a good option for rental properties, and while ductless systems are minimally invasive to install, installation should always be discussed with the property owner first. Mini-split systems are permanently installed, requiring a hole to be drilled through an external wall to connect the indoor air handler to the outdoor condenser.
Are mini-splits worth the higher cost?
Mini-splits are definitely worth their higher initial cost if you are looking for a primary cooling system for your space, year-round temperature control, or just a low-profile, quiet cooling solution in a sunroom, workshop, or garage. A portable mini-split would be the better way to go if you need supplemental cooling in a bedroom, office, or living space for the summer.
Do portable air conditioners remove humidity?
Yes, most portable air conditioners and mini-split air conditioners remove some humidity from the air as they operate; however, they won’t be a reliable solution to humidity problems, like a dehumidifier is. If your space has a humidity issue, take a look at this Dehumidifier vs Air Conditioner: When To Use Each or Both article to learn more about both types of appliances.
Can mini-splits heat in winter?
Yes, most modern mini-splits have a built-in heat pump or a supplemental electric heater that can provide heating, making it a great investment for year-round temperature control.
Should I get a Mini-Split or a Portable AC?
Whether you should get a mini-split system or a portable air conditioner completely depends on where and why you need temperature control.
Portable ACs are best for a single bedroom, office, or living space as an additional cooling source that works alongside your existing HVAC system. The best ducted mini-split systems are installed in newly built homes or homes with existing ductwork as a main cooling and heating system, while ductless mini-splits are great for retrofit HVAC installation in your whole home or for individual installation in a room.
This can be a complex decision, but we are here to help! Whether you’re looking for the best ductless mini-split for your sunroom, a portable AC for the room above your garage, or a ducted mini-split as a whole-home cooling system, we are here to help you decide. Just give our air conditioning experts a call at 1-800-934-9194 or email experts@sylvane.com to get expert recommendations you can count on.
