Everyday use
Standard garage
Reliable year-round comfort for parking, storage, projects, and regular household use.
Start with 9K-12KGarage comfort
Mini Split for Garage
Hot in summer, cold in winter. Build year-round comfort around the way you actually use your garage.
- 1-car
- 9K-12K BTU
- 2-car
- 12K-18K BTU
- Workshop
- 18K-24K BTU
Before you size
Start with the garage, not the product.
Square footage narrows the range. Insulation, climate, ceiling height, door openings, and equipment decide the final load.
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01
Insulation first
The garage door is often the biggest source of heat gain and heat loss.
-
02
Account for extra heat
Workout equipment, tools, vehicles, and direct sun can push the load higher.
-
03
Match the winter rating
Choose a model rated to keep heating at your local outdoor design temperature.
-
04
Avoid guesswork
Too little capacity can struggle, while oversizing can reduce comfort and humidity control.
Choose by use
What kind of garage are you conditioning?
Match the closest use case first. It gives the sizing guide context without turning the page into an HVAC manual.
Everyday use
Higher activity
Garage gym
Plan for body heat, equipment, humidity, and the hours you actually train.
Compare 12K-18K
Higher load
Workshop
Frequent door openings and heat-producing tools can require more capacity.
See workshop sizing
Large or divided space
Storage-heavy garage
Shelving, partitions, tall ceilings, and blocked airflow all affect the final fit.
Review 18K-24KBTU sizing guide
Choose by garage size.
These ranges are practical starting points for enclosed garages with typical ceiling heights.
Sizing is a starting point
Final sizing should account for insulation, ceiling height, sun exposure, door openings, local design temperatures, and installer review.
Recommended systems
Garage-ready Della picks.
One practical starting point for each common garage size, connected to live Shopify products.
Cold-climate pick
DELLA Optima Series 12000 BTU 23 SEER2 Ultra Heat Mini Split AC (R-454B) - Up to 550 Sq.Ft.
- Garage fit
- 1-2 car
- Capacity
- 12K BTU
$914.96
Compact garage
DELLA Vario Series 9000 BTU 20 SEER2 Mini Split Heat Pump AC - Up to 400 Sq.Ft.
- Garage fit
- 1 car
- Capacity
- 9K BTU
$729.96
2-car garage
DELLA Vario Series 18000 BTU 21 SEER2 Mini Split Heat Pump AC - Up to 1000 Sq.Ft.
- Garage fit
- 2 car or gym
- Capacity
- 18K BTU
$1,049.96
Large shop
DELLA Vario Series 24000 BTU 21 SEER2 Mini Split Heat Pump AC - Up to 1500 Sq.Ft.
- Garage fit
- Large or high load
- Capacity
- 24K BTU
$1,499.96
Installation planning
Plan the placement before checkout.
A clear route for power, drainage, and the line set matters as much as the wall where the indoor unit goes.
Indoor placement
Use a clear high-wall location that can move air across the active area.
Outdoor clearance
Keep the condenser serviceable and clear of stored items, snow, and exhaust.
Electrical and line set
Confirm voltage, dedicated circuit, drainage, and line-set length before ordering.
Free shipping
Fast standard delivery on eligible Della systems.
30-day returns
A straightforward return window for eligible purchases.
24/7 live support
Get help with product questions and installation planning.
Quick answers
Garage mini split questions.
Clear answers to the sizing, insulation, and winter-performance questions that usually hold up the decision.
Is a ductless mini split good for a garage?
Yes. A mini split can efficiently heat and cool an enclosed garage without extending existing ductwork. The right capacity still depends on insulation, climate, and how the space is used.
What size mini split should I start with for a 2-car garage?
Many insulated 2-car garages start in the 12K-18K BTU range. Tall ceilings, poor insulation, frequent door openings, direct sun, or workshop equipment can increase the load.
Can a mini split heat an uninsulated garage?
It can, but air leakage and uninsulated doors or walls make the system work harder. Improve the envelope first when possible, then confirm sizing with an HVAC professional.
Which model should I choose for a cold winter?
Choose a low-ambient heating model whose published operating range covers your local winter design temperature. Compare the rating, not only the BTU number.
Build your garage comfort plan
Ready for a garage that works in every season?
Start with the 12K collection, or compare 18K options for larger and higher-load spaces.
