Marine Grade.    US-Based.    Fanatical Support.

Quiet, Efficient DC Air Conditioning & Heat For Your Boat

12V 24V 48V 120V — COMING SOON
No generators. No maintenance. No noise. Just quiet comfort wherever you drop anchor.
Shop DC Systems Is SeaAir right for your boat?

Trusted by cruisers over thousands of hours in the most demanding climates.

SeaAir DC marine air conditioner with the SeaAir mobile app home screen
BOAT SHOW SPECIAL Now’s the time to join the SeaAir Family - $250 off every systemthrough November 30
Claim the offer →

Real Installs. Real Boats. Real Comfort.

These videos were filmed by real customers and installers - not actors or AI
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ONE MACHINE · 12V · 24V · 48V

The Complete DC Solution

Say goodbye to generators and noisy marine HVAC. SeaAir systems run straight from battery power.

30–60 A
POWER DRAW AT 12V
5k–12k
BTU CAPACITY RANGE
45 lb
13" × 18.25" × 13"
0
GENERATORS REQUIRED
Variable output
Choose Overnight, Daytime or Boost to match the cabin and the conditions.
Power use limits
Set an amp-hour budget — it stops when the limit is reached.
iOS & Android app
Full control, analytics and AI diagnostics from your phone.
Whisper quiet
Hear the ocean at anchor — not the machine keeping you cool.
See the technology →
PROOF FROM THE WATER

Cruiser tested. Off-grid proven. Comfort always on.

Real installs on real boats — in their owners' words.

42' Lagoon Catamaran — Bahamas
"Silent cooling at anchor. Absolute game changer."
42' LAGOON CATAMARAN — BAHAMAS
44' Cabin Cruiser — Florida Keys
"No more generator noise at night. The 12V draw is exactly as promised."
44' CABIN CRUISER — FLORIDA KEYS
47' Hanse — Coastal Florida
"Sleeping in air conditioning without a generator is next level."
47' HANSE — COASTAL FLORIDA
Island Packet 420 — East Coast, USA
"Other machines keep me awake at night, but this machine is remarkably quiet! Very pleased!"
ISLAND PACKET 420 — EAST COAST, USA
Helia 44' Fountaine Pajot — Bahamas
"Excited about this system and continuous over-the-air updates."
HELIA 44' FOUNTAINE PAJOT — BAHAMAS
Find an installer

Want a pro to install it?

Find marine installers near you who have put SeaAir systems into our customers' boats. Enter your zip code to see who works in your area.

Or browse the installer map →
ABYC standardsWe like to work with ABYC certified installers and look for work built to American Boat & Yacht Council standards.
Exceptional workClean wiring, tidy plumbing, and a system tested before they leave the dock.
They take care of their customersProfessionals who communicate clearly and stand behind their work.

Installers are independent business owners and are not part of SeaAir. SeaAir does not endorse or warranty installation work.

SeaAir mobile app home screen
SEAAIR MOBILE APP

The industry's first mobile app for marine climate systems

Control every SeaAir device aboard, set hard power budgets in amp-hours, and let AI diagnostics watch water flow, heat exchange and filters for you.

1
Multi-device control
Every SeaAir system on the boat, one app — switch cabins with a swipe.
2
Power budgets
Set a hard amp-hour limit — the system stops when it's reached. Your batteries stay safe.
3
AI diagnostics & performance graphs
Live system health checks and usage-over-time analytics, built from real machine data.
Download on the App Store Get it on Google Play
SEE THE FULL TECHNOLOGY →
Reviews

Fanatical support, but don't take our word for it

The reviews speak for themselves.

5.0 on Google (9 reviews) Trustpilot (7 reviews)
★★★★★ Trustpilot

I reached out to the company directly and spoke to the owner, he was super knowledgeable and I purchased it over the phone that day.

The unit shipped immediately and I had it in hand within 2 days from Florida.

During install he answered my phone calls and was able to explain and resolve all my issues.

This product is fantastic, I highly recommend.

Read the full review →
Mark P.SV Lord Batten · Oriental, NC
★★★★★ Google

Recently installed Sea Air 12 Volt HVAC unit to use with 24 Volt system and are thus far very pleased with its performance. It is a good, efficient and powerful unit.

The updated APP is very promising and makes it easy to check, analyze and customize the system from our iPhone/iPad.

John and Howie have been very helpful with their support and knowledge!

Read the full review →
J.Z.24V system
★★★★★ Google

Just completed my install of the Sea Air 12 volt HVAC unit. We’ve been using it for night heating and midday cooling for two days now, just to test things. It’s working flawlessly. The app is super easy to use. The system is looking to be a game changer for us…very quiet, and it’s low power use means we could use it at anchor without having to run a genset. Very impressive!

Read the full review →
Tom12V system
★★★★★ Google

I installed my SeaAir last winter. We spent 83 days cruising some of the Great Lakes. The system made cold mornings warm and hot muggy nights, cool! Of all the additions I’ve done to my boat, the SeaAir system has made the biggest contribution to the comfort we experience.

Catalina Morgan 381, 600ah LiFePO, additional Balmar alternator and soon to have solar.

Read the full review →
Ken K.Catalina Morgan 381 · Great Lakes
★★★★★ Google

Just installed a 12v unit from sea air on our 50 foot catamaran, SV Chasing Serenity. The guys from Sea Air went above and beyond to help plan out and answer questions during the installation process. Finally practical to use AC on anchor!

SV Chasing Serenity50' catamaran
★★★★★ Trustpilot

SeaAir’s product and customer support is top notch! Very knowledgeable and patient with answering questions regarding their AC units. Quality support is a rarity of today, when you call SeaAir REAL people attend you. That is a gem in it of itself!

Pryscilla M.
★★★★★ Google

The folks at SeaAir have been beyond helpful with my 12v hvac unit. I have a 1987 Sabre 34ft sailboat. And the one unit I have in the wet locker does plenty well. During peak summer heat I can cool boat to 70-75 in Maryland - when it is 90-100 outside.

In a perfect world with some insulation work - I’m sure it would be better.

John has helped me through some troubleshooting over the phone and has been there for me when I have any question!

This was what I was hoping for when supporting a US company. IDC what unit you buy - there are going to be questions. Some places are responsive, most aren’t. But just wanted to say thank you again!

Read the full review →
Justin W.1987 Sabre 34 · Maryland
★★★★★ Google

We had a great experience purchasing and installing the 48v version of the SeaAir AC with variable speed compressor. Soon after installing, the mobile app became available which greatly improves the usability to be more like our other devices. The engineers provided excellent in person and remote support.

Read the full review →
Stefan F.48V system
★★★★★ Google

Love working with SeaAir!

Our 12v unit has been great. We’ve had it since may 2024. Super quiet. Easy and straightforward to install. South Florida summers are HOT, this AC does well even when the water temp is high. Any questions we’ve had the people over at SeaAir have responded very quickly, always with solutions and information, never excuses. It’s been refreshing.

Read the full review →
Christopher W.South Florida
★★★★★ Trustpilot

Great product! User friendly and a great addition to the boat for the hot summer!

Michael M.
★★★★★ Google

I was an early purchaser of this air condition, Had a few technical issues which the technical department quickly took care of. Mostly run it on low speed which Burns about 31 amps per hour. I also have used the heat in the winter

Michael W.
Read all reviews

What's next from SeaAir

SEE EVERYTHING COMING →
16k BTU Smart Climate Control System
NEW · SHIPPING SOON

16k BTU Smart Climate Control System

48V & 120V. The technician comes built in — diagnostics and remote support.
SeaAir Touchscreen Display
NEW ACCESSORY

SeaAir Touchscreen Display

Wall-mounted touchscreen, wired to DC power, running the full SeaAir app for the whole crew.
🧊
COMING SOON

12v Fishing Ice Maker

15 lbs of ice an hour, straight off the battery bank.
Shipped worldwide

From our Florida docks to anchorages around the world

SeaAir systems ship from Jacksonville and Fort Lauderdale to boats across the US and around the globe. The countries lit up below have SeaAir systems running in them today.

47Destinations
27Countries & territories
2Florida shipping hubs
Map highlighting the countries SeaAir systems have shipped to from Jacksonville and Fort Lauderdale, Florida
Ships from Jacksonville & Fort LauderdaleCountries where SeaAir systems have shipped
Instagram

Follow along on Instagram

Product news, boat show dates, installs and life at anchor. Follow @goseaair so you don't miss what's next.

Is SeaAir Right For Your Boat?

Answer a few simple questions to find out how a SeaAir machine can transform your experience on the water.

Make Comfort a Standard, Not a Compromise.

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