Mini-Split Heat Pump units are a great way to heat and cool a garage since they are small and are low-cost to operate.
They can be installed by an HVAC company or by a handy Do-It-Yourself type person.
DIY mini-split kits have become very popular since they can be installed by a homeowner and are highly efficient.
They have high SEER rating that makes them ideal for heating and cooling a space such as a garage.
I recently installed a MR Cool Mini Split on my garage which works very nicely. (Video is at the bottom of the page.)
I have also installed several other types of units on home additions and even as whole house systems.
Below is my picks for the best Mini Split unit to heat or cool a garage.
I also wrote post and made videos of installing the units to show the steps involved if you install a unit yourself.
Be sure to read the reviews on Amazon, forums, or elsewhere to be sure a unit is a good fit for you.
*This post contains affiliate links which at no cost to you allows us to earn a commission on product purchases.
My Picks for The Best Mini Split for a Garage 2019
- MRCOOL DIY Series
PIONEER Air Conditioner Pioneer Mini Split Minisplit Heatpump 9000 BTU-208/230 V
Pioneer units are very popular for Do-It-yourself homeowners who want to install a unit themselves.
Some basic tools will be needed such as a vacuum pump and HVAC gauges.
There are many low-cost budget tools can be bought and used.
Of course an HVAC tech can also be paid to do the install.
Pioneer builds several units from 9000 BTU to 36000 BTU along with both 120 volt and 220 volt systems.
The average garage size of 20×20 feet is a total of 400 SQ Ft which a 9,000 – 12,000 BTU unit would heat and cool.
Of course, how hot the temperature gets will be a factor when choosing how big a unit to get.
Senville 9000 BTU SENA-09HF/Z Energy Star Mini Split Air Conditioner Heat Pump, White
Senville is another popular brand that comes with everything needed for an install and is great for a garage.
The kits have different size units to fit any size garage.
Like the Pioneer kits, they are low-cost budget units that a Do-it-yourself type person can install.
I have installed many Senville units and like all mini-split heat pumps work great heating and cooling.
MRCOOL Comfort Made Simple DIY 12,000 BTU Ductless Mini Split Air Conditioner and Heat Pump System with Wireless-Enabled Smart Controller; Works with Alexa, Google or App; 115V AC
The MRCOOL DIY Series of Heat pump mini split units are the easiest kits to install.
The line set comes already in a vacuum that the seal is broken when bolted up.
This means there is no need for a vacuum pump or gauges with simply bolting the line set to the outside condenser.
I installed a Mr Cool on my garage and it has been working very well during the summer and winter both heating and cooling.
The one downside to Mr Cool units is they do cost more but may be worth it for anyone looking for the quick and easiest unit to install.
Daikin 12,000 BTU 17 SEER Wall-Mounted Ductless Mini-Split Inverter Air Conditioner Heat Pump System 15 Ft. Installation Kit & Wall Bracket (230 Volt) 10 Year Limited Warranty
Daikin is another good A/C manufacture that has many DIY kits.
Like the Pioneer and Senville kits, a vacuum pump and gauges will be needed during an install.
As an HVAC tech I have installed many Daikin units.
A company I once worked for had an owner that would only install Daikin mini split.
They are good units that would have no problem heating and cooling a garage.
What Size Mini Split Does a Garage Need?
HVAC units such as garages heat and cool by size rated with BTU’s.
The square feet of a garage is calculated and matched to the BTU size.
For example, a 15 X 20 foot garage would be a total of 300 Sq Ft and would use an 8,000 – 9,000 BTU unit.
To get the square feet of a garage measure the width by the length an multiply the 2 numbers.
See Here for an HVAC Mini split Sizing Chart.
Do All Mini Split Units Heat and Cool?
Not all mini split unit heat and cool.
All units will cool a space but only heat pump units also heat in the winter.
They do work less efficiently at very low temperatures 10-15 degrees.
A heat pump works the reverse of a standard A/C system when it needs to heat. This requires it to dissipate the cold air pulled from a space outside. When the temperature drops too low a heat pump can start to have problems working.
In very cold weather the outside condenser can freeze solid. When this happens a heat pump will go into air conditioning mode for 5-10 minutes to melt the condenser ice.
Heat pumps can be fitted with heat strips that like a large space heater have elements to keep sending out heat if this happens.
Getting heat strips installed will depend on how cold it gets where you live.
For example in the south west heat strips are rarely used since the temperatures almost never drop below 10-15 degrees.
How to Install Mini Split in a Garage
A Mini split unit can be installed by an HVAC company or a Do-It-Yourself person can install it themselves.
The units are not difficult to install depending on your prior skills. Here are the basics of installing a unit.
The inside blower unit will need to be mounted on a wall.
A hole will need to be cut through the wall to run the line set and thermostat wire.
The line set will need to be connected for the outside condenser unit to the inside unit. A flaring tool will be needed.
Electrical will need to be run to the unit going through a fuse box or disconnect.
After everything is hooked up a vacuum pump is used to create a vacuum in the line set. Gauges will be used to make sure it holds a vacuum.
Once the line set holds a vacuum the refrigerant is released by turning the release valve.
Mini split heat pumps are ideal for a garage or any open space that needs heating and cooling.
For a Do-It-Yourself type of person installing one shouldn’t take more than a day. There is plenty of information online on how to install one. Check out the video at the bottom of the page, one of many YouTube videos on how to install a mini split.
Hiring a local HVAC company is always a good idea if you are not comfortable installing a unit.