Ductless Mini Split Installation & Replacement Experts

At Sterling Mechanical, we specialize in ductless mini split installation and replacement done right—the first time. We never cut corners or rush the job. Whether you’re replacing an older unit or adding a new system for better comfort and efficiency, we focus on clean, precise work that meets manufacturer standards and exceeds your expectations.

100% Gurantee

Local Heating Experts

Membership Options

Custom Heating Service

Why Homeowners Choose Sterling Mechanical

Free Estimates, No Pressure
Whether you’re ready today or just exploring options, we’re here when you need us.

One Standard of Work
We have ductless mini split options for every budget, but installation quality never changes. Every job is held to the same high standard.

Owner-Reviewed Quality
Photos are taken at the end of each job and reviewed by the owner before inspection. Your system doesn’t move forward until it passes our internal check.

Transparent Pricing
What we quote is what you pay. If anything comes up outside the original scope, we’ll explain it clearly and provide straightforward pricing before proceeding.

Signs It Might Be Time to Replace Your Ductless Mini Split

  • System is 10–15 years old

  • Uneven temperatures between rooms or zones

  • Unusual noises, odors, or frequent error codes

  • Rising energy bills without increased use

  • Leaks, rust, or visible wear on the indoor or outdoor unit

  • Reduced cooling or heating output

  • Frequent repairs or unreliable performance

Choosing the Right System

We help you select the best ductless mini split for your home, comfort needs, and energy goals. Key factors we’ll walk through:

  • Home Size and Layout
    Proper sizing ensures optimal efficiency, even temperatures, and longer system life.

  • Energy Efficiency
    We’ll help you compare upfront costs to long-term savings with high-efficiency models.

  • Number of Zones
    Choose single-zone or multi-zone setups to match your home’s layout and comfort needs.

  • Maintenance Preferences
    Some systems are easier to service than others. We’ll help you pick what fits your lifestyle.

  • Extra Features
    Options like Wi-Fi control, advanced air filtration, and variable-speed compressors can make a big difference in comfort and control.

Systems We Install

  • Single-Zone Mini Splits

  • Multi-Zone Mini Splits

  • Wall-Mounted Units

  • Ceiling Cassette Units

  • Floor-Mounted Units

Need a Fast Replacement?

We’re based in San Diego and ready to help. Call us for quick turnaround and quality work you can count on.