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Can I Put a Mini-Split in My Garage?


Garages are versatile spaces that can serve many purposes, from housing your vehicles and tools to providing a workshop or extra living space. To make your place comfortable year-round, especially in extreme weather conditions, you may consider installing an air conditioning system.

If you’ve ever wondered, “How can I add a mini-split in my garage?,” you’re in luck. Before adding a mini-split to your home, we’ll discuss the things to consider.

What Is a Mini-Split System?

Can i put a mini split in my garage

A mini-split system, also known as a ductless mini-split, is a heating and cooling system comprising two main components: an indoor air-handling unit and an outdoor compressor/condenser unit.

These units are connected by refrigerant lines, allowing for efficient temperature control. Mini-splits are famous for their energy efficiency, versatility, and ease of installation compared to traditional central HVAC systems.

Can I Put a Mini-Split in My Garage?

Yes, you can! In fact, using a mini-split system inside the garage is highly recommended to efficiently cool and heat the space, as mini-splits are well-suited for this purpose. But, before determining whether you can install a mini-split in your garage, you should evaluate the following factors:

Size of the Garage

Mini-splits are effective for spaces ranging from a few hundred square feet to around 1,500 square feet. A mini-split could be suitable if your garage is within this range. However, huge garages might require multiple units or other HVAC solutions.


Proper insulation is essential so you can maintain a comfortable indoor environment. A well-insulated garage retains conditioned air more efficiently, reducing the workload on the mini-split system.


Consider your local climate when deciding on a mini-split system. If you experience extreme temperature variations, you may need a higher heating and cooling capacity unit.

Garage Usage

How you plan to use your garage matters. A basic system might suffice if it’s solely for storage or parking vehicles. But if you intend to use it as a workspace, gym, or living area, you may want a more sophisticated mini-split system.

Installation Considerations

Installing a mini-split in your garage involves several key considerations:

Local Codes and Regulations

Check with your local building department to determine if specific regulations govern installing garage HVAC systems. Compliance with codes and obtaining necessary permits is crucial.


Properly sizing the mini-split system is essential for efficient operation. An HVAC professional can calculate the required heating and cooling capacity based on the garage’s size, insulation, and usage.


Decide where to mount the indoor air-handling unit. Wall-mounted, ceiling-mounted, and floor-mounted options are available, but the choice depends on your garage’s layout and preferences.


Mini-splits generate condensate, so you’ll need a suitable drainage system to prevent water accumulation.

Electrical Requirements

Ensure your garage has the necessary electrical capacity to accommodate the mini-split system. You may need to hire an electrician to upgrade the wiring if necessary.


The outdoor unit must have adequate clearance and be positioned for proper airflow. It should also be accessible for maintenance and repairs.

Maintenance and Costs

Mini-splits are generally low-maintenance systems but require periodic servicing to ensure optimal performance. Maintenance tasks may include cleaning filters, checking refrigerant leaks and levels, and inspecting electrical connections. Additionally, factor in the initial equipment cost, installation, and potential energy savings when considering a mini-split for your garage.

Where Should You Not Install a Mini-split?

While mini-split systems are versatile and can be installed in a variety of locations, there are certain situations where it may not be advisable or practical to install them:

Extreme Outdoor Climate

Mini-splits may not be suitable for extreme outdoor conditions such as severe cold or hot climates. The system’s efficiency can be reduced in icy areas, and in extremely hot regions, it may struggle to cool adequately. Specialized HVAC systems like geothermal or high-capacity central air conditioners may be more appropriate.

Poorly Insulated Spaces

Mini-splits work best in well-insulated spaces. Suppose the area where you intend to install the mini-split has inadequate insulation. In that case, the system may push itself to maintain your preferred temperature, leading to reduced efficiency and higher energy bills.

Spaces With Excessive Moisture

Mini-splits can handle some humidity, but they may not be the best choice for extremely humid environments. Excessive and extreme moisture can lead to mold and mildew growth in the indoor unit, reducing air quality and potentially damaging the system and your health.

Rooms With Limited Space

Mini-splits require indoor and outdoor units, which can take up valuable space. In tiny rooms with minimal space, alternative heating and cooling solutions like window units or portable air conditioners may be more practical.

Mini-split systems also require professional installation, and the positioning of the indoor and outdoor units is crucial. If the room has limited access for installation or lacks a suitable location for the outdoor unit, it may be challenging to install a mini-split system.

Budget Constraint

While energy-efficient, mini-split systems can have higher upfront costs than other HVAC solutions. If budget constraints are a concern, it’s essential to consider alternative heating and cooling options.

Ultimately, the suitability of a mini-split system depends on the specific characteristics of the space, the local climate, and your budget. Consulting with an HVAC professional is highly recommended to assess whether a mini-split is the right choice for your particular situation or if an alternative HVAC system would be more appropriate.

Final Thoughts

Installing a mini-split system in your garage can be a wise choice to create a comfortable and usable space year-round. However, assessing your garage’s size, insulation, local regulations, and specific needs is crucial before proceeding.

Consulting with an HVAC professional is advisable to ensure your mini-split system is correctly sized and installed, ensuring efficient operation and long-term comfort in your garage.

JP Reyes

JP has been in the aircon industry for almost as long as he has been alive. As a child JP would help his tatay fix aircon units at their junk shop in Cavite. After graduating UP in the early 2000's, JP then started his own Aircon servicing business and within 5 years had 10 shops in 8 different cities. Fast forward to today and JP brings all his experience and expertise online to give readers trustworthy advice and reviews about Air-conditioning buying, servicing, cleaning and repair in the Philippines.

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