Why Mini Splits Are Perfect for Heating Missouri Garages and Additions
Garages and home additions are some of the hardest spaces to keep comfortable—especially in Missouri’s unpredictable weather. Traditional HVAC systems often don’t extend into these areas, and running new ductwork is costly and invasive. That’s where mini splits shine. Here’s why they’re the perfect heating (and cooling) solution for garages and additions.
9/10/20251 min read
No Ductwork Needed
Garages and additions are usually built after the original HVAC system was installed, meaning they’re often unconditioned. Mini splits offer a ductless solution, requiring just a small hole through the wall to connect the indoor and outdoor units. No floor vents, attic runs, or ceiling cuts.
Zoned Temperature Control
Your garage or addition might be used differently than the rest of the house. With a mini split, you can:
Keep it warm while you’re using the space
Turn it off completely when you’re not
Set different temperatures from the main living area
This control equals major energy savings and tailored comfort.
Fast and Affordable Installation
Installing a traditional HVAC extension into a garage or addition can cost $3,000–$8,000 or more. A mini split installation typically ranges from $2,500 to $5,000—and it’s usually done in one day.
Cold-Climate Performance
Modern mini split systems are designed to perform even during Missouri’s coldest months. Cold-climate models operate efficiently in temperatures as low as -13°F, keeping garages and additions warm and usable all winter long.
Common Use Cases
We’ve installed mini splits in:
Detached garages turned into workshops
Sunrooms and four-season rooms
In-law suites and apartment additions
Finished attics or basements
Homeowners consistently report more comfort, lower energy bills, and better year-round use of these spaces.
Bonus: No Extra Load on Your Main HVAC
Trying to heat a garage or addition with your main HVAC system can stress it out and shorten its lifespan. Mini splits take that load off, giving your central system a break and saving money over time.
Thinking about heating your garage, sunroom, or addition? Call Global Kingdom Contracting at 636-222-3509 for a free quote and custom system recommendation.