Buying a new AC is a $5,000–$12,000 decision you'll live with for 15 years. In Florida, getting it wrong means a decade of high bills, humidity problems, and constant repairs. Here's the complete guide.
Step 1: Don't Trust "Rule of Thumb" Sizing
The old rule says "1 ton per 500 sq ft." It's wrong, especially in Florida. Sizing should be done with a Manual J calculation that considers:
- Square footage AND ceiling height
- Insulation level (R-value)
- Window count, orientation, and type
- Number of occupants
- Local climate data (Miami vs. Orlando vs. Pensacola)
- Shade and tree coverage
Why it matters: oversized systems cool the air too fast and don't run long enough to remove humidity. Result: cold, sticky homes that feel worse than a properly-sized system at the same temp.
Step 2: Pick the Right SEER Rating
SEER is efficiency. Higher = lower bills.
- SEER 14 (minimum 2024 standard): Entry-level. Skip unless budget is critical.
- SEER 16: Sweet spot for most South Florida homes. Pays back upgrade in 3–4 years.
- SEER 18–20: Variable-speed compressors. Better humidity control. Pays back in 5–7 years if you run AC 9+ months/year (basically everyone here).
- SEER 22+: Premium variable-speed (Carrier Greenspeed, Lennox SL28). Best comfort, longest payback (~10 years).
Our recommendation for most homes: SEER 16. For premium homes/Long stayers: SEER 18–20.
Step 3: Heat Pump vs Straight AC
For 90% of South Florida homes: heat pump wins. Full comparison here.
Step 4: Pick a Brand
The dirty secret of HVAC: the install matters more than the brand. A perfect Goodman install will outlast a sloppy Trane install.
Top brands ranked by reliability + Florida service network:
- Carrier — most-installed brand in FL, strongest dealer network
- Trane — built like a tank, "Nothing stops a Trane" tagline is earned
- Lennox — highest SEER ratings, best for efficiency hounds
- American Standard — same factory as Trane, often $1,000+ cheaper
- Rheem / Ruud — best value tier with reliable mid-range systems
- Goodman / Amana — budget tier with lifetime compressor warranty
- Bryant — Carrier's sister brand, good variable-speed options
Step 5: Get 3 Quotes (Done Right)
Make sure each quote includes:
- The exact model number and SEER rating
- Manual J load calculation (ask for the printout)
- New refrigerant line set, drain pan, and pad — standard, not extras
- Permit fees and inspection
- 10-year parts warranty AND a labor warranty length
- Thermostat (smart Wi-Fi should be included)
- Removal and disposal of old equipment
- Total out-the-door price, no asterisks
Step 6: Don't Get Tricked by These 5 Common Scams
1. "Free" services that are baked into the price
"Free thermostat!" "Free duct cleaning!" — usually $300 padded into the install cost. Ask for itemized pricing.
2. Same-day "decision" pressure
"This price is only good today" = walk away. Reputable installers will honor a quote for 30+ days.
3. "Bait and switch" SEER ratings
The salesperson quotes a SEER 16 system, the installer puts in a SEER 14 indoor coil — making the whole system effectively SEER 14. Insist on matched-system AHRI certificate.
4. Skipping the permit
FL law requires permits for AC replacement. "Permit-free" installs are illegal, void warranties, and cause insurance issues at resale.
5. Wildly oversized systems
Easy sale = bigger system = bigger commission. If your current 3-ton works and a contractor wants to sell you 5 ton, get another opinion.
Step 7: Stack Your Incentives
- Federal Tax Credit (Inflation Reduction Act): Up to $2,000 for qualifying heat pumps (SEER 16+, HSPF 9.5+)
- FPL Rebates: $200–$1,000 depending on system efficiency. Apply within 6 months of install.
- Manufacturer rebates: Seasonal — usually $300–$1,500 spring/fall. Ask.
- 0% financing: Available on most installs. Spreads $7,000 system over 60–84 months at $0 interest.
What You Should Actually Pay (2026 South Florida)
| System Size | SEER 14 | SEER 16 | SEER 18+ |
|---|---|---|---|
| 2 ton (900–1,200 sf) | $4,295–$5,500 | $5,200–$6,800 | $6,500–$8,500 |
| 3 ton (1,500–2,000 sf) | $5,500–$6,800 | $6,500–$8,500 | $8,000–$10,500 |
| 4 ton (2,200–2,800 sf) | $6,500–$8,000 | $7,500–$9,800 | $9,500–$12,500 |
| 5 ton (2,800–3,500 sf) | $7,500–$9,500 | $8,500–$11,000 | $11,000–$14,500 |
Prices include standard install. Add ~$1,500–$3,000 for duct rework if needed.
Ready to get an honest quote? Call (855) 417-8866. Free in-home estimates across South Florida.