Commercial HVAC Replacement Cost Estimator
Replacement pricing for aging commercial HVAC systems — rooftop units, chillers, and packaged systems, sized to your building.
Replacing Commercial HVAC Systems in Florida
Replacing an aging commercial HVAC system is a different project than new construction — it has to work around an occupied building, existing curb and ductwork, and often code upgrades that weren't required when the original system was installed.
Florida's commercial buildings run their HVAC systems harder and longer than most of the country, which means replacement often comes with additional considerations: upgraded curb adaptors, code-required efficiency improvements, and coordination around business operating hours.
We prepare CSI Division 23 replacement estimates for rooftop units, packaged systems, and chillers — scoped for occupied-building replacement work.
What Drives Commercial HVAC Replacement Costs
System Type
Rooftop packaged units, split systems, and chillers carry very different replacement costs.
Curb & Ductwork Compatibility
Mismatched curb sizes between old and new units can add significant labor cost.
Efficiency Code Upgrades
Current commercial energy codes may require higher-efficiency equipment than the original install.
Occupied-Building Scheduling
After-hours or phased replacement work to minimize business disruption affects labor cost.
Permit & Inspection
Commercial mechanical permits typically require engineered documentation for replacement.
Building Size & Zoning
Multi-zone buildings may require multiple units or a coordinated replacement phasing plan.
Commercial HVAC Replacement Cost by System Size
Ranges reflect typical Florida installed costs for commercial system replacement. Final quotes depend on tonnage, system type, and building access.
| Building Size | System Type | Typical Cost Range |
|---|---|---|
| Under 5,000 sq ft | Rooftop Packaged Unit | $12,000 – $28,000 |
| 5,000–15,000 sq ft | Multiple RTUs or Split Systems | $28,000 – $75,000 |
| 15,000–50,000 sq ft | Multi-Zone RTU System | $75,000 – $220,000 |
| 50,000+ sq ft | Chiller / Central Plant | $220,000+ |
Get Your Commercial HVAC Replacement Estimate
Submit Building Details
Send square footage, current system info, and plans through the form below.
Receive a Flat-Rate Quote
We review scope and send a firm price and delivery date.
We Prepare Your Estimate
Division 23 line items scoped for occupied-building replacement.
Get Your Bid-Ready Report
Delivered in PDF + Excel, ready for contractor bids.
Frequently Asked Questions
How much does commercial HVAC replacement cost?
Typical costs range from $12,000 for a small rooftop unit to $220,000+ for a large multi-zone or central plant system, depending on building size and system type.
Do I need to upgrade to a higher-efficiency system?
Current Florida commercial energy codes may require higher SEER2 or equivalent ratings than older systems, which we factor into the estimate.
Can HVAC replacement happen without closing my business?
Often yes, with proper scheduling and phasing. We factor after-hours or phased work into the estimate when requested.
Is a permit required for commercial HVAC replacement?
Yes, most Florida jurisdictions require a commercial mechanical permit with engineered documentation for full system replacement.
How fast can I get a commercial HVAC replacement estimate?
Most commercial HVAC estimates are delivered within 48–72 hours depending on building complexity.
Get a Flat-Rate Commercial HVAC Replacement Estimate
48–72 hour delivery · CSI Division 23 format · PDF + Excel