“My highest recommendations for Devon and the Maritime Air team — thorough, honest, and on time. They explained everything in plain language and didn't push any unnecessary upsells.”
Spencer Fuller
May 2026
Cost Education · Treasure Coast
What Actually Affects AC Installation Cost?
There's no single price for an AC installation — and any company that quotes one over the phone is guessing. Here's what we actually look at when we build your written estimate, so you understand exactly what you're paying for.
Why Treasure Coast Trusts Us
Reasons Homeowners & Captains Pick Maritime Air Co.
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Treasure Coast residents
Residential · Commercial · Marine
Full-spectrum HVAC
Written Estimates
Approved before work begins
Photo-Documented Work
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St. Lucie County member
1. Proper system sizing (Manual J)
Florida builders frequently install oversized equipment that cools fast but won't pull moisture out of the air. We calculate the actual heating and cooling load of your home using ACCA Manual J — square footage, insulation, glazing, orientation, infiltration, occupants. Correct sizing is the foundation of an efficient, comfortable install.
- Manual J load calculation
- Latent (moisture) load separate from sensible (temperature) load
- Right-sized equipment, not oversized 'just in case'
2. Equipment tier and efficiency (SEER2)
Florida code minimum is 15.2 SEER2. Mid-tier two-stage systems land around 16–17 SEER2. Premium variable-speed systems (Trane XV20i, Carrier Infinity 26, Mitsubishi hyper-heat) reach 18+ SEER2 and dehumidify dramatically better. The efficiency tier you choose changes equipment cost — and your electric bill for the next 12 years.
3. Coastal-grade coil and cabinet treatment
Salt air destroys aluminum fins and copper coil joints. For homes near the coast, we recommend factory coastal coils plus Heresite or Blygold aftermarket coating. Cabinets get powder-coat or marine-grade treatment. It adds material cost; it can also double or triple equipment lifespan.
4. Ductwork condition
An oversold installation that ignores leaky ducts can waste 20–30% of the air the new system produces. We inspect duct integrity, return capacity, and static pressure before we quote. Sometimes that means a sealing add-on, sometimes targeted replacement, sometimes nothing — but we look first.
5. Indoor air quality additions
UV-C purification, MERV-13+ media filtration, whole-home dehumidifiers, and surge protection are optional but commonly included for coastal Florida homes. We quote them as separate line items so you can choose what fits your priorities.
6. Access, electrical, and permits
Attic vs. garage vs. closet air handler. Ground pad vs. roof pad vs. crane lift. Electrical service upgrade if your panel can't support the new equipment. County permits and inspections — handled in-house — are part of every legitimate Florida install.
- Equipment location and access
- Electrical service capacity and disconnect
- New refrigerant line set if reusing isn't appropriate
- Permits and final inspection coordination
7. Warranty tier
Standard manufacturer warranties cover parts for 10 years on registered equipment. Extended labor warranties (often tied to enrollment in our maintenance program) protect you against future labor costs. Warranty selection is a real cost line — we explain the trade-offs honestly.
How we keep pricing transparent
Every installation starts with a free in-home estimate. You receive a written, itemized quote with 1–3 equipment tiers, the load calc, and the warranty options. You approve in writing. We don't change the number on install day.
- Free in-home Manual J estimate
- Written, itemized quote with 1–3 options
- 0% and low-monthly financing available
- Old equipment removal included
- Permits, inspections, and warranty registration handled
Reviews
What Treasure Coast Customers Say
5.0
37 Google Reviews
Google
“Devon has provided thorough maintenance and excellent service. Truly family-owned care — they treat your home like it's their own. Highly recommend for Treasure Coast homeowners.”
Oh Canada
March 2026
“Working with Devon on my HVAC system was a great experience from start to finish. Fair, clean install, and the system has been running perfectly through Florida summer heat.”
David Alker
February 2026
Our Work
View all projects Example HVAC Scenarios
Real installs and repairs we've completed across the Treasure Coast.
Coil Cleaning
Evaporator Coil Pull & Deep Clean — Port St. Lucie
Port St. Lucie, FL · Residential Split System
Trane Installation
Trane XV20i Installation — Fort Pierce
Fort Pierce, FL · Trane XV20i + TAM9
Trane Installation
Trane XR16 + Heat Pump Installation — Port St. Lucie
Port St. Lucie, FL · Trane XR16
FAQ
Common Questions
Why won't you publish installation prices?+
An honest installation quote requires a Manual J load calculation, a duct inspection, and a conversation about efficiency goals and equipment preferences. Two homes that look identical can need very different systems. We provide a free in-home estimate so the number we give you is the number you'll see on the contract.
Is bigger always better when sizing?+
No — and oversizing is the #1 cause of clammy, humid homes in Florida. An oversized AC cools the air fast but never runs long enough to remove moisture. Proper Manual J sizing is non-negotiable for comfort.
Are coastal coatings worth the cost?+
For homes east of US-1 or near the Intracoastal, yes. Uncoated aluminum coils typically fail in 5–8 years on the beach. Heresite or Blygold coatings extend that lifespan dramatically and pay for themselves in extended equipment life.
Do you offer financing on installations?+
Yes — flexible financing including 0% promotional and low-monthly options on qualifying installations. Ask the estimator for current programs.
Request your free in-home replacement estimate.
Call (772) 236-4277 or schedule online. Class-A licensed across the Treasure Coast.