A mini split is the single best upgrade you can make to a garage in Arizona. It turns a July sauna into a workshop, gym or flex room you actually want to use, and it does it more efficiently than a window unit or an HVAC extension.
See how it works, step by step ↓The guide
Before the equipment order goes in, three things matter most: correct sizing, the garage's layout and insulation, and where the hot spots are.
01 · Size it
An undersized unit runs nonstop and never gets there. An oversized unit short-cycles, wastes energy and leaves the room clammy.
A 400 sq ft one-car garage is a very different load than a 700 sq ft two-car.
10 and 12 foot ceilings need more BTU than a 9 foot ceiling.
The number and size of windows adds to the load.
One zone, or splitting the space between two heads.
02 · Prep the garage
An uninsulated attached garage in Phoenix can easily need 40% more BTU than the same footprint of indoor space.
An insulated door moves the load number a lot.
R-19 in the walls and a drywalled ceiling help the unit keep up.
Afternoon sun creates heat the unit has to fight.
Metal roll-up doors add heat too. Placement and sizing account for it.
03 · Install
The install is straightforward for an experienced crew, and most jobs are done in a single day.
Outdoor condenser on a pad, indoor head on the wall or ceiling.
Run through a small penetration in the wall.
Tie in power. Some garages need a circuit upgrade.
The step that decides long-term efficiency.
04 · Maintain
Clean them every 1 to 3 months in a dusty garage.
Check for leaks once a year.
Verify the unit is reaching its SEER rating.
A professional look once a year. Watch energy use for early signs of efficiency loss.
Garage guide
Sizing, unit choices, heating and cooling, and running it on solar.
A mini split turns an Arizona garage into a workshop, gym or flex room you want to spend time in.
Choosing a system
Professional vs. DIY
“The price was in budget and they were able to accommodate our roofer's schedule.”
Suzette L. · Google Review
“I highly recommend Solar Fix for their caring approach and top-notch service!”
Melissa D. · Google Review
“Very refined process in place here with lots of communication.”
Brian G. · Google Review
What we can help with
Mini splits give you targeted temperature control without extending your central HVAC.
No existing ductwork required, so you skip the drywall work.
Highly efficient compared to extending central HVAC into the garage.
Holds a stable environment for classic cars, instruments, tools or a home gym floor.
The most common and least expensive option. Mounts high on a wall and stays out of the way.
Recessed into the ceiling for a cleaner look. Great for finished garages and flex rooms.
One outdoor unit drives two indoor heads. Useful for a three-car garage or a garage plus workshop.
A conventional garage mini split typically lands between $1,000 and $4,000 installed, depending on unit size, SEER rating and electrical work. The Peak Cool solar mini split from SolarFIX is $6,999 for a one-room system, installed with panels.
See the install cost breakdown →SolarFIX is AZ ROC #323541, licensed, bonded and insured. Call for a load calc and install quote, or request service online.
