Every replacement we quote starts with a Manual J load calculation — the actual heat gain of your house, not a rule-of-thumb guess based on square footage. Then we match equipment to that load, evaluate ducts and electrical, plan for salt exposure and drainage, pull the Martin County permit, and document startup with real measurements. You get a written scope with all of it: equipment model and efficiency, duct and electrical work, permit and inspection, warranty registration, and financing terms in plain language.
Time to replace? Watch for these
- The system needs R-22 refrigerant, which is scarce and expensive
- Compressor failure on a unit more than a few years old
- Coils or cabinet visibly corroded from salt air
- Repairs adding up to a meaningful share of a new system's cost
- Rooms that never cool evenly no matter the repair
- Energy bills climbing year over year on the same habits
- The system is 10–15+ years old and major parts are failing
- Humidity stays high even when the thermostat is satisfied
What affects your price
These factors shape your final price. Published local benchmark ranges appear in the page copy where they're relevant — and you'll get every charge in writing before work begins.
- Load-calculated system size and equipment match
- SEER2 level and compressor type (single, two-stage, variable)
- Coastal coil coating and corrosion-resistant cabinet options
- Duct sealing, insulation, or replacement scope
- Electrical upgrades and surge protection
- Pad elevation, strapping, and drainage work
- Permit, inspection, haul-away, and commissioning
What's included with AC Installation in Stuart
Every AC Installation job is scoped and documented up front — here's what you get when we roll up to your Treasure Coast home or business.
- Manual J load calculation and Manual S equipment selection, in writing
- Duct system evaluation with sealing and insulation recommendations
- Coastal-rated equipment options for homes near the water
- Martin County permit pulled, inspection scheduled, records delivered
- Deep-vacuum evacuation and charge-to-spec refrigerant work
- Commissioning: measured airflow, temperature split, and electrical data
- Warranty registration, maintenance plan, and financing terms documented
Sizing first: Manual J, S, and D, explained simply
Manual J calculates exactly how much heat your home gains — windows, insulation, orientation, infiltration, occupancy. Manual S selects equipment whose capacity matches that load with the right safety margins. Manual D governs duct design and airflow. In Florida's humid climate this sequence matters more than anywhere: an oversized system cools the air fast, shuts off, and leaves the air clammy, because dehumidification happens in the long, steady runs it never performs.
Florida guidance requires sizing calculations at permit for total residential equipment replacement, and Martin County requires a permit to install an air conditioner. We handle the permit, schedule the inspection, and provide the final record. If a contractor quotes your replacement from the driveway without a load calculation, that's the first tell the low price will cost you later.
Coastal-rated equipment: what changes near the water
Salt air kills condensers 4–8 times faster than inland conditions. Within a mile or two of the St. Lucie River, the lagoon, or the ocean — Sewall's Point, Sailfish Point, the Hutchinson Island condos, riverfront Stuart — we spec coastal-rated equipment: factory epoxy-coated condenser coils, corrosion-resistant cabinets and fasteners, and sometimes relocated or shielded placement.
The upgrade cost is modest against the alternative. A standard coil in a waterfront yard can shed fins and lose capacity in five to seven years; a coated coil stretches that meaningfully. We pair it with the rest of the coastal package — elevated pads in surge-prone blocks, hurricane strapping per code, freshwater rinse access, and surge protection — so the new system is built for its actual address.
What installation day actually looks like
A proper replacement is a two-day job more often than a same-day swap. Day one: recover and remove the old system, set the new pad and equipment, run line sets and electrical, and modify duct connections. Day two (or the same evening if scope allows): evacuate the refrigerant lines to a deep vacuum, charge to spec, commission with measured airflow and temperature split, and walk you through the thermostat and maintenance schedule.
The paperwork matters as much as the work. You receive the permit and inspection record, equipment model and serial numbers, warranty registrations, commissioning readings, and maintenance recommendations. If you're comparing quotes, ask each contractor for exactly that list — the one who can't produce it is the one whose $2,000-cheaper bid becomes your next problem.
Financing without surprises
Replacement is often unplanned, so we offer financing options with the terms in writing: APR, promotional periods, whether deferred interest applies, fees, and total repayment. Approval is subject to credit — a prequalification isn't a guaranteed offer — and we'll always show the cash price alongside the financed path so you can compare honestly.
Ask the same questions of any financing offer you're shown elsewhere: what happens if a payment is late, when does the first payment begin, and does the promotional rate vanish retroactively if the balance isn't paid in the window? A monthly payment is marketing; the written agreement is the truth.

Our AC Installation process
Test first, document everything, and get your sign-off before the work happens — no guesswork, no surprises.
- 1
Free on-site estimate
We inspect the existing system, ducts, electrical, and drain arrangement, then run the load calculation that sizes the new equipment honestly.
- 2
Written scope and options
You get repair-vs-replace context, equipment options at different efficiency and corrosion-resistance levels, and line-item pricing with financing terms.
- 3
Permit and scheduling
We pull the Martin County permit, order equipment, and schedule the install around your calendar — most replacements complete in one to two days.
- 4
Installation and startup
Old equipment removed, new system set, lines evacuated to a deep vacuum, charge to spec, and every connection checked under load.
- 5
Commissioning and handoff
Airflow, temperature split, and electrical readings documented; thermostat configured; warranties registered; maintenance schedule explained.
Why Stuart homeowners choose HVAC Stuart FL for AC Installation
15+ years on the Treasure Coast, 4.9★ across 187+ reviews, and a licensed, insured, EPA-608–certified crew that treats your home like a neighbor's.
- Manual J sizing on every quote — no driveway square-foot guesses
- Coastal-rated options that outlast standard coils near the water
- Permits, inspections, and commissioning data delivered, not skipped
- Line-item written scopes that compare cleanly against other bids
- Financing with APR and terms in writing, approval subject to credit
Where we provide AC Installation
We install and replace AC systems across Stuart, Palm City, Sewall's Point, Jensen Beach, Port Salerno, Hobe Sound, and throughout Martin County. We handle AC Installation across all of Martin County — from our shop at 3077 SE Dixie Hwy, Stuart, FL 34997. That includes Martin County, Sewall's Point, Ocean Breeze, Rio, Jensen Beach, Palm City, North River Shores and Port Salerno, plus Treasure Coast neighbors from Fort Pierce to Jupiter. Call (327) 210-5999 and we'll confirm same-day or 24/7 emergency availability for your address.
Ready for AC Installation in Stuart?
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AC Installation FAQs
Central AC installation near Stuart is commonly reported at $5,800–$11,200, and Florida full-system replacement planning figures can reach $6,400–$13,000 depending on equipment match, ductwork, electrical needs, permits, and indoor-air-quality additions. We give you a written line-item quote after the load calculation — those ranges are planning context, not a price.
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