How does a mini-split work? An installer's breakdown
A mini-split is an air conditioner (or heat pump) that doesn't use ductwork. Here's how the refrigerant cycle, indoor heads, and outdoor unit actually work together.
Everything we've written about ductless — straight from the technicians who handle these jobs across San Diego County. Pricing, troubleshooting, and what actually works in our climate.
A mini-split is an air conditioner (or heat pump) that doesn't use ductwork. Here's how the refrigerant cycle, indoor heads, and outdoor unit actually work together.
For pre-1970 SD homes without ducts: ductless wins. For modern homes with existing ducts: ducted is cheaper. Here's the decision framework with real install costs.
Real 2026 pricing for ductless mini split installation in San Diego, single-zone, multi-zone, rebates, and what drives the final number up or down.
Mini splits cost $4,800–$7,500 (single-zone) or $10,000–$15,000 (3-zone) installed in San Diego. When they beat central AC and mistakes to avoid.
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