Marine HVAC Is Not the Same as Home HVAC
A boat's air conditioning system lives in one of the harshest environments a refrigeration system can face: constant vibration, salt air, tight engineering spaces, and — the biggest difference of all — raw-water cooling. Instead of rejecting heat to outdoor air like a home condenser, a marine AC unit pumps seawater through a coaxial condenser to carry heat away. That single design choice drives almost every marine AC problem and every maintenance requirement.
At Fixar Inc., we are a licensed NYC HVAC contractor with EPA-certified technicians who handle refrigerant every day. The same diagnostic discipline we bring to brownstone split systems applies to the sealed refrigerant circuit on your vessel — combined with an understanding of the raw-water loop, marine wiring, and the corrosion realities of a saltwater slip.
Raw-Water Cooled
Seacock, strainer, raw-water pump, coaxial condenser, and overboard discharge — an entire plumbing system your home AC simply does not have, and the source of most "boat AC not cooling" calls.
Corrosion & Salt Air
Electrolysis, galvanic corrosion, and salt-laden air attack coils, fasteners, and electrical connections far faster than anything on land. Marine-grade materials and bonding matter.
Tight Engineering Spaces
Units are tucked under bunks, in lazarettes, and behind joinery. Access, vibration isolation, and condensate management all require a marine-specific approach.
Freeze Risk in Winter
In the Northeast, seawater left in the system can freeze and crack heat exchangers and condensers. Winterization is not optional here — it is essential.
The Three Marine AC System Types
Which system your vessel uses determines how it is serviced, sized, and installed. Most recreational boats and yachts fall into one of three categories:
Self-Contained Units
Compressor, condenser, evaporator, and blower in a single chassis tucked under a bunk or settee. The standard on boats roughly 45′ and under.
Marine AC Installation →Split Systems
Condensing unit and air handler in separate locations, joined by refrigerant lines. Common on vessels up to roughly 80′.
Marine AC Installation →Chilled-Water Systems
A central chiller feeds a water loop to multiple air handlers across zones. The standard on yachts roughly 80′ and up.
Yacht Chilled-Water Systems →Our Marine HVAC Services
Dockside service across the Brooklyn waterfront and the wider NYC harbor. Whatever your vessel needs, start here:
Boat AC Repair
AC not cooling, weak airflow, raw-water pump failure, high-pressure faults — diagnosed and repaired at the dock.
Marine AC Repair →Marine AC Installation
New installs, retrofits, and repowers — self-contained, split, and chilled-water systems, correctly sized and plumbed.
Marine AC Installation →Maintenance & Descaling
Annual dockside maintenance and coaxial condenser descaling. Restore cooling capacity and catch problems before peak season.
Marine AC Maintenance →Winterization & Commissioning
Protect heat exchangers from freeze damage in the off-season, and recommission cleanly in spring.
Winterization & Commissioning →Yacht Chilled-Water Systems
Multi-zone chiller systems, air handlers, and circulation pumps for larger vessels (80′+).
Yacht Chilled-Water HVAC →Marinas We Serve
Dockside service from our Brooklyn waterfront base — Sheepshead Bay, Jamaica Bay, and the NYC harbor.
Marinas We Serve →Talk to a Technician
Not sure what your system needs? Describe the symptoms and we will point you to the right service.
Contact Fixar →Who We Serve — and Why Our Location Matters
Our shop sits at 501 Surf Ave in Coney Island, Brooklyn 11224 — on the waterfront, minutes from Sheepshead Bay and Jamaica Bay. Most marine AC specialists serving the NYC area are based in New Jersey or out on Long Island. We are already here, which means shorter travel time to your slip and less of your bill spent on a technician's drive.
We work with:
- Recreational boat owners — cruisers, sportfish, and sailboats with self-contained or split systems.
- Yacht owners — larger vessels running multi-zone chilled-water systems.
- Liveaboards — where reliable climate control is not a comfort item, it is your home.
Why Fixar for Marine HVAC
Licensed & EPA-Certified
A licensed NYC HVAC contractor with EPA Section 608–certified technicians for proper, legal refrigerant handling on every job.
Local to the Water
Based on the Brooklyn waterfront — not New Jersey or eastern Long Island — so dockside response is faster and travel costs lower.
Systems We Service
We service marine AC systems from manufacturers including Dometic, Cruisair, Marine Air Systems, Mermaid, and Webasto.
Frequently Asked Questions
Do you service marine AC at the dock?
Yes. Most marine AC diagnosis, repair, winterization, and commissioning is performed dockside at your slip. Our Brooklyn waterfront location keeps response times and travel costs down compared with shops based in New Jersey or eastern Long Island.
What marine AC system types do you work on?
All three common types: self-contained units (boats roughly 45′ and under), split systems (up to roughly 80′), and chilled-water systems (yachts roughly 80′ and up). See our marine AC installation and yacht chilled-water pages for details.
Which marine AC brands do you service?
We service systems from manufacturers including Dometic, Cruisair, Marine Air Systems, Mermaid, and Webasto. We are an independent service contractor, not a brand dealer, so our recommendations are based on your system and situation.
Is marine AC winterization really necessary in New York?
Yes. Seawater left in the raw-water side of the system can freeze over a Northeast winter and crack the condenser or heat exchanger — an expensive repair that proper winterization prevents.
Keep Your Boat Cool All Season
Dockside marine HVAC across Brooklyn and the NYC harbor. Get a free estimate or talk to a technician today.
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