Garages are one of the trickiest areas in the home to keep cool. Unlike bedrooms or living rooms, garages often lack insulation and aren’t connected to central HVAC systems. Portable air conditioners are ideal for this purpose.
Instead of drilling into walls or setting up ductwork, portable ACs provide a simple, flexible, and efficient way to manage indoor temperatures.
In this article, we’ll walk you through the best options currently available and how to select the right model based on garage size, usage, and setup needs.
Common Garage Cooling Challenges
Poor Insulation And Rising Heat
Garages typically aren’t designed with comfort in mind. Thin walls, metal doors, and direct sunlight can easily turn your garage into an oven. On summer days, interior temperatures may climb well above the outside ambient level.
Lack Of HVAC Connection
Most garages aren’t connected to a central HVAC system, which makes cooling options more limited and harder to manage.
Electrical Load And Space Limitations
Installing a large AC system isn’t always realistic in a garage setting. Portable ACs solve this by offering plug-and-play convenience and taking up less space.
Key Factors To Consider When Choosing A Portable Air Conditioner
BTU Rating Based On Square Footage
The larger your garage, the higher the BTU rating you’ll need. Here’s a basic reference:
- 200–300 sq ft: Look for 8,000–10,000 BTUs
- 300–500 sq ft: Aim for 12,000–14,000 BTUs
- Over 500 sq ft: Consider 14,000+ BTUs or dual hose units
Ventilation Requirements
Most portable ACs need to exhaust hot air outside. Make sure your garage has a suitable window or can accommodate a wall/door panel for the exhaust hose.
Smart Features And Mobility
Units with app control, programmable timers, and rolling wheels enhance usability. For example, Della models include smart WiFi control that lets you manage temperature and settings from your phone.
Top 5 Della Portable Air Conditioners For Garage Use
8,000 BTU Portable AC – Best For Small Garages (Up To 300 Sq Ft)
This compact model is perfect for tight garage spaces or smaller workstations. It features a single-hose system, three-in-one functionality (cooling, dehumidifying, and fan), and a user-friendly remote control. Its small footprint and caster wheels make it easy to move around.
Highlights:
- Covers up to 300 sq ft
- Built-in dehumidifier
- Easy-to-clean air filter
- Quiet operation suitable for workshops
10,000 BTU Portable AC – Balance Between Size And Power (Up To 400 Sq Ft)
If your garage is mid-sized and you’re using it more regularly, this unit provides stronger cooling power without being too bulky. It includes a sleep mode, 24-hour programmable timer, and three fan speeds.
Highlights:
- Digital LED display
- Auto-evaporation system
- Remote and touch panel controls
- Easy hose installation
12,000 BTU Portable AC – Heavy-Duty Solution (Up To 500 Sq Ft)
For larger garages that house multiple tools, cars, or even double as workspaces, this model hits the sweet spot. It combines energy efficiency with wide area coverage and multiple cooling modes.
Highlights:
- Covers up to 500 sq ft
- Three-in-one functionality
- Washable air filter
- Sleep and eco modes included
14,000 BTU Portable AC With Heat – All-Season Use (Up To 700 Sq Ft)
This high-capacity unit is not just for cooling—it also has heating functionality, making it ideal for year-round use. Great for insulated garages, converted spaces, or semi-permanent work zones.
Highlights:
- Dual functionality: cooling and heating
- Remote, digital display, and app control
- Quiet operation
- Full-function control panel with swing function
Dual Hose 14,000 BTU Portable AC – Fastest Cooling Option
This model uses dual-hose technology to provide faster and more stable cooling by separating intake and exhaust. It’s ideal if your garage gets unbearably hot or is exposed to direct sunlight.
Highlights:
- Quick temperature control
- Better efficiency in large open garages
- Includes complete installation kit
- Dehumidifying mode
Setup Tips For Using Portable ACs In A Garage
Plan Ventilation Carefully
Choose a model that fits the available exhaust route — a window, wall hole, or even a modified door panel can work. Always seal the opening well to avoid air leaks.
Use Insulated Panels Or Curtains
Even partial insulation can help keep the cold air in and reduce workload on the AC unit. Consider foam panels or reflective curtains behind garage doors.
Elevate The Unit Off The Ground If Needed
Avoid placing the unit directly on concrete, especially if water tends to pool in the garage. A small platform can prevent damage and improve airflow.
Regular Maintenance Is Key
Clean filters monthly and check the exhaust hose for blockages. Units with washable filters, like those from Della, are easier to maintain.
Pros And Cons Of Using Portable ACs In Garages
| Pros | Cons |
| Easy installation | Requires regular maintenance |
| No need for ducts | Not as efficient as mini-splits |
| Mobile and space-saving | Some noise, depending on the model |
| Ideal for renters | Needs venting access |
Additional Recommendations For Garage Cooling
To improve the effectiveness of your portable air conditioner in the garage, consider using ceiling or oscillating fans to help distribute cool air more evenly. Avoid running heat-generating tools while the AC is on, as they can counteract the cooling effect.
Over time, upgrading insulation and applying reflective paint or installing insulation panels on garage doors can also significantly enhance overall temperature control.
Conclusion
If you need a quick, effective way to cool your garage, portable air conditioners are a smart choice. From compact models for small garages to heavy-duty units for larger areas, there’s a Della AC that fits the bill. With features like smart control, washable filters, and multi-mode operation, you can expect year-round comfort with minimal effort.
Choose the right size, prepare your space for efficient ventilation, and perform regular upkeep — and your garage can stay cool even during the hottest months.
