HVAC zoning systems solve the most frustrating problem in two-story Orange County homes: hot upstairs, cold downstairs. By dividing your ductwork into independent zones with motorized dampers and separate thermostats, each area maintains its own temperature. Aerosphere installs Honeywell TrueZONE, Trane ComfortLink, and Carrier zoning systems across OC.
Services We Provide
Two-Zone System
Standard upstairs/downstairs split for two-story homes. Two thermostats, two dampers, one control board.
Three-Zone System
Living areas / master suite / bedrooms — three independent zones with three thermostats.
Four+ Zone System
Whole-home zoning for large homes (3,500+ sq ft) or homes with significant sun-exposure differences across rooms.
Smart Vent Integration
Flair Smart Vents or Keen Home automated registers for room-by-room control without permanent damper installation.
Bypass Damper Configuration
Proper bypass damper installation prevents static pressure issues when only one zone is calling for air.
Communicating Zone Controls
Integration with Trane ComfortLink II, Lennox iHarmony, or Carrier Infinity for variable-speed-system synergy.
2026 Pricing in Orange County
| Service | Typical Cost | Notes |
|---|---|---|
| Two-zone basic system (Honeywell TrueZONE) | $2,500 – $4,500 | Two thermostats + dampers + controller |
| Three-zone system | $3,500 – $6,000 | Three independent zones |
| Four-zone system | $5,000 – $8,500 | Whole-home zoning |
| Premium communicating zoning (Trane/Lennox/Carrier) | +$1,500 – $3,000 | Variable-speed compatible |
| Smart Vent system (Flair) — 6 vents | $1,200 – $2,200 | No ductwork modification |
| Bypass damper add-on | $400 – $800 | Critical for proper static pressure |
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
Will HVAC zoning fix my hot upstairs?
Yes — properly designed zoning gives the upstairs more airflow when it is cooling and less when it is not, eliminating the "hot upstairs / cold downstairs" problem common in two-story OC homes. Most customers report a 3-5 degree improvement on the previously hot floor.
How much does HVAC zoning cost?
A basic two-zone system runs $2,500-$4,500. Three-zone systems run $3,500-$6,000. Premium communicating zoning paired with variable-speed AC adds $1,500-$3,000. Most two-story OC homes see ROI in 3-5 years through bill savings.
Do I need new ductwork for zoning?
Not usually. Most existing ductwork can be retrofitted with motorized zone dampers at the trunk-line splits. Aerosphere does a Manual D analysis first to verify your current ductwork can handle zoning — some undersized older duct systems need upsizing before zoning will work.
Can I retrofit zoning to my existing HVAC?
Yes — most existing single-stage and two-stage AC systems can be zoned. Variable-speed systems work best with their manufacturer-matched communicating zoning (Trane ComfortLink, Lennox iHarmony, etc.) for optimal modulation.
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.