Ductless mini-split systems are the fastest-growing HVAC category in Orange County — perfect for room additions, ADUs, garages, casitas, hot/cold rooms in existing homes, and whole-home conversions where ductwork is impractical. Aerosphere installs Mitsubishi (including Hyper-Heat H2i), Daikin, Fujitsu, and LG ductless systems with full permit and HERS coordination.
Services We Provide
Single-Zone Installation
One indoor head + one outdoor condenser. Perfect for additions, garages, bonus rooms, master suites, or single hot/cold zones.
Multi-Zone Installation
2 to 8 indoor heads on one outdoor condenser. Different temperatures per room, premium comfort, no ductwork needed.
Mitsubishi Hyper-Heat H2i
Cold-climate heat pump that works below 0°F. Required for foothill communities (Yorba Linda, Coto, Anaheim Hills) where winter nights drop near freezing.
Whole-Home Ductless Conversion
Replace central air + furnace with multi-zone ductless system. Maximum efficiency, no ductwork losses.
ADU + Casita Installation
Code-compliant mini-split installs for ADUs, casitas, pool houses, granny flats, garage conversions.
Commercial Mini-Split
Office spaces, retail, restaurants, server rooms — ceiling cassette and concealed-duct options.
2026 Pricing in Orange County
| Service | Typical Cost | Notes |
|---|---|---|
| Single-zone 9,000 BTU (small room) | $3,800 – $5,500 | One indoor head |
| Single-zone 12,000 BTU (1 ton) | $4,500 – $6,500 | Bedroom or garage |
| Single-zone 24,000 BTU (2 tons) | $5,800 – $8,500 | Large open area |
| 2-zone multi-split | $7,500 – $11,000 | Two rooms |
| 3-zone multi-split | $9,500 – $14,000 | Three rooms |
| 4-zone multi-split | $12,000 – $18,000 | Whole-home small home |
| 6-8 zone multi-split (whole-home conversion) | $18,000 – $32,000 | Replaces central air entirely |
| Mitsubishi Hyper-Heat premium | +15-25% upcharge | Sub-freezing capability |
Why Orange County Homeowners Choose Aerosphere
- C10 + C20 licensed — Both electrical and HVAC contractor licenses (CSLB #1108650).
- Same-day response — Most calls dispatched same-day across Orange County.
- Free written estimates — No hidden fees, no high-pressure sales.
- Permits handled — We pull all required permits and coordinate city inspections.
- Full warranty — Parts and labor warranty on every job.
- Licensed and insured — General liability and workers comp.
Get a Free On-Site Estimate
Aerosphere Electric provides free written estimates across Orange County. Same-day response on emergency calls.
Call 714-499-6656Frequently Asked Questions
Are ductless mini-splits worth the higher cost?
For room additions, ADUs, and homes without existing ductwork — absolutely. For whole-home conversions, mini-splits have 30-40% lower operating costs than central air because there are no duct losses. Federal IRA rebates ($2,000-$8,000) plus SCE rebates can offset 30-50% of install cost on heat pump mini-splits.
How long does mini-split installation take?
Single-zone installs take 1 day. Multi-zone installs take 1 day per zone (2 zones = 2 days, 4 zones = 4 days). Permit and city inspection add 1-2 weeks to total project timeline. Aerosphere can typically have your system running same-day after install.
Are mini-splits quieter than central air?
Yes — indoor heads run 19-30 decibels (whisper-quiet). Outdoor condensers run quieter than central air units because they are variable-speed. Most Aerosphere customers comment on the noise reduction as much as the cooling performance.
Which mini-split brand is best?
Mitsubishi has the deepest catalog and the only true cold-climate option (Hyper-Heat H2i). Daikin has excellent reliability and quietest operation. Fujitsu is the budget premium choice. LG is value-tier. Aerosphere installs all four and helps you choose based on your home and budget.
Service Areas
Aerosphere Electric serves all of Orange County including: Anaheim · Irvine · Santa Ana · Huntington Beach · Garden Grove · Fullerton · Costa Mesa · Mission Viejo · Fountain Valley · Yorba Linda · Lake Forest · Newport Beach · Tustin · Orange · Buena Park · Brea. C10 + C20 California contractor license 1108650.