Martin County · Treasure Coast

AC Repair & HVAC Installation in Sewall's Point, FL

Maritime Air Co. is the family-owned HVAC and marine specialist Sewall's Point homeowners trust for waterfront comfort. Salt-air-resistant equipment, marine HVAC for private docks, and the kind of craftsmanship that respects a historic Treasure Coast home.

(772) 236-4277 Schedule Service

License # CAC1824400 5.0 · 37 Google Reviews ZIPs: 34996

Why Treasure Coast Trusts Us

Reasons Homeowners & Captains Pick Maritime Air Co.

5-Star Rated
Verified Google reviews
Licensed & Insured
Class-A CAC1824400
Family Owned & Operated
Treasure Coast residents
Residential · Commercial · Marine
Full-spectrum HVAC
Written Estimates
Approved before work begins
Photo-Documented Work
Warranties registered for you
Chamber of Commerce
St. Lucie County member

Sewall's Point HVAC Services

Trusted Air Conditioning Services for Sewall's Point Homeowners

AC Repair in Sewall's Point

Same-day diagnostics for failed compressors, refrigerant leaks, frozen coils, and thermostat issues.

AC Installation in Sewall's Point

Right-sized, energy-efficient systems engineered for Florida humidity and salt-air corrosion.

Duct Cleaning in Sewall's Point

Remove dust, pollen, pet dander and mold for healthier indoor air across coastal homes.

Maintenance Plans in Sewall's Point

Captain's Comfort Club — twice-a-year tune-ups, priority dispatch, and warranty-keeping service.

Local Climate

What Sewall's Point's Climate Means for Your HVAC

Sewall's Point sits in USDA zone 10a with a humid subtropical climate. Summer dewpoints regularly exceed 75°F from June through September, our AC systems run 12–16 hours per day, and August indoor latent loads can double a home's design moisture removal requirement. Homes within 3 miles of the Atlantic or Indian River Lagoon also face chloride-laden salt air that destroys uncoated aluminum condenser coils in 5–8 years. Equipment selection, coil coatings, and dehumidification strategy in Sewall's Point are not the same as inland Florida — and they shouldn't be priced or installed the same way either.

Common HVAC Issues

The Most Common HVAC Problems We See in Sewall's Point

After thousands of service calls across the Treasure Coast, these are the failures we diagnose week after week in Sewall's Point homes. If any of them sound familiar, call us before they turn into a compressor or coil replacement.

Frozen evaporator coils

Florida humidity overworks under-maintained systems — a common Sewall's Point call. We diagnose airflow restrictions, dirty filters, and low-charge issues that cause icing.

Compressor failures from voltage spikes

Summer storms and FPL surges destroy compressors across Sewall's Point. We install whole-system surge protectors and source warranty-replacement Trane, Carrier, and Goodman scroll compressors fast.

Refrigerant leaks at coil joints

Salt air corrodes aluminum coil fins on homes east of US-1. We pressure-test with nitrogen, electronically leak-detect, and re-braze or replace coils with coastal-grade Heresite-coated alternatives.

Sky-high humidity (60%+ indoor RH)

Oversized or single-stage systems short-cycle and never pull moisture out. We right-size with Manual J, install variable-speed equipment, and add dedicated dehumidification when needed.

Mold and mildew on supply registers

Standing condensation, dirty blower wheels, and biofilm in the drain pan all show up as black streaks on ceilings. We sanitize coils, replace drain pans, and add UV-C lights.

Sudden FPL bill spikes

A failing capacitor, dirty condenser coil, or partial duct collapse can quietly add $80–$150/month. Our $89 tune-up catches all three before they snowball.

Local Expertise

Why Sewall's Point Homes Need a Coastal HVAC Specialist

Salt-air destroying condenser coils

Within 3 miles of the Indian River Lagoon, uncoated aluminum fins corrode through in 5–8 years. We spec Heresite or e-coated coastal-grade equipment as standard.

Mature trees and humid microclimates

Sewall's Point's tree canopy holds humidity around homes. We design for dewpoint, add dehumidification where needed, and seal returns to prevent musty air handlers.

Hurricane resilience

Surge protection, hurricane straps on condensers, and elevated pads on flood-prone lots. We install with the next storm in mind.

Neighborhoods We Serve in Sewall's Point

North Sewall's Point
South Sewall's Point
Archipelago
Castle Hill
River Forest
Knowles Park area
Indian River Drive estates

Call (772) 236-4277 Schedule Service

Marine HVAC in Sewall's Point

Dockside Marine Air Conditioning Service for Sewall's Point Boaters

Serving Indian River Drive private docks, Sewall's Point waterfront homes, Manatee Pocket access and every private dock in Sewall's Point. Class-A licensed and EPA 608 certified — we diagnose, repair, and replace every major marine HVAC brand with the saltwater corrosion expertise your vessel demands.

Marine AC Repair

Full-spectrum dockside marine HVAC service & emergency response.

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Cruisair Repair

Self-contained, split-gas, and chilled-water Cruisair systems.

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Dometic Marine AC Repair

Dometic Turbo, Emerald, SMX controls, and chiller diagnostics.

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Marine Chiller Systems

Chilled-water yacht HVAC, fan-coil units, zone controls.

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Barnacle Buster Service

Closed-loop seawater coil descaling to restore cooling capacity.

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Marine Water Pump Replacement

March, Cruisair & Headhunter raw-water pumps swapped dockside.

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Boat AC Down?

Same-day dockside response in Sewall's Point.

(772) 236-4277

Why Maritime Air Co.

Why Sewall's Point Homeowners Choose Maritime Air Co.

Class-A Licensed (CAC1824400)

Florida Class-A Certified Air Conditioning Contractor with no job-size limitations — residential, commercial, and marine.

Family-owned, Treasure Coast based

Local Port St. Lucie shop. You speak to the owner, not a national call center.

5.0 ★ on Google + Nextdoor Fave 2025

Hundreds of neighbors trust us. Read every review before you book — we publish them all, good and bad.

10-year parts & labor warranty

Standard on qualifying new installs. We register every system the day it's commissioned.

Marine HVAC specialists

Cruisair, Dometic, Webasto chillers and air handlers. Dockside service across every Treasure Coast marina.

Upfront flat-rate pricing

You approve the price before we turn a wrench. No surprise add-ons, no commission-driven tech upsells.

Our Work

Recent Sewall's Point Area Projects

A sample of installs and repairs we've completed near Sewall's Point.

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Coil Cleaning

Reviews

What Sewall's Point Customers Say

Real Google reviews from Treasure Coast homeowners, business owners, and captains.

5.0

37 Google Reviews

“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

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

Google

“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

Google

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FAQ

Sewall's Point HVAC Questions, Answered

Do you service Sewall's Point, FL?+

Yes — Sewall's Point is a core part of our Martin County service area. Same-day for emergencies, scheduled for installs. We're familiar with the waterfront homes and the salt-air challenges they face.

How do you handle salt-air corrosion on Sewall's Point HVAC equipment?+

We recommend coastal-grade condensers with Heresite or e-coated coils, twice-yearly coil washing with non-acidic cleaners, and aluminum-clad disconnect boxes. Salt destroys uncoated equipment within 5–8 years in Sewall's Point.

Do you service waterfront docks and boats in Sewall's Point?+

Yes — Sewall's Point homeowners use our marine HVAC division for Cruisair, Dometic, and Webasto systems on boats kept at private docks.

Are you familiar with the historic homes in Sewall's Point?+

Yes. Many older Sewall's Point homes have undersized returns, original ductwork in attics, and no modern surge protection. We retrofit carefully and respect the home's character.

Knowledge Graph

Every honest repair starts with the same measurements. These are the diagnostic guides our technicians use in the field — read them before you accept a diagnosis.

Diagnostic