Mermaid M6 6500 BTU 230V Cool Only Marine A/C Unit

The Mermaid M6 delivers 6,500 BTU cool-only capacity from 230V power for dedicated cooling in compact marine spaces.

6,500 BTU output targets smaller interiors.
230V supply guides electrical compatibility.
Cool-only operation excludes heating functions.
Dedicated cooling serves marine cabins.
Compact capacity fits limited spaces.

$2,145.00

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SKU: M6CO230T Category: Marine Air Conditioners Brand: Mermaid Marine Air

SKU:

M6CO230T

Description

Downsizing from an oversized AC unit is more common than most boat owners expect, and the Mermaid M9 Cool Only in 110V trim is often the result — 9,000 BTU of straightforward cooling for boats around 30 feet as a cruiser or 32 feet as a sailboat, without the added mechanical complexity of reverse cycle heating built in.

Key Features of the Mermaid M9 Cool Only (110V)

Simpler mechanical design than the reverse cycle version, with fewer components to maintain long-term
Shares its compact stainless steel base with the smaller 6,500 BTU M6 unit
Soft start technology and variable speed blower reduce startup power draw
Available in right, left, or top air discharge configurations
Resettable 30-amp circuit breaker replaces the older glass fuse for easier field service

Mermaid M9 Technical Specifications (110V, Cool Only)

Model: M9 (Cool Only)
Cooling Capacity: 9,000 BTU
Voltage: 110V
Running Amperage: 7.0 A
Cooling Capacity (Volume): 800 cubic feet
Recommended Boat Size: up to 30′ cruiser or 32′ sailboat
Unit Dimensions (L x W x H): 16″ x 11.5″ x 11.5″
Ducting: 6″ and 4″ combination, minimum three 4″ round supply grilles recommended
Warranty: 5 years against material defects and workmanship

Why Choose the Mermaid M9 Cool Only

Fewer moving parts means one less system that can eventually need service — a real advantage for owners in consistently warm climates with no real use for onboard heating. If your cruising takes you into cooler weather at any point in the year, the Reverse Cycle or Electric Heat versions of the M9 solve that instead, at the same footprint.

Mermaid builds these units by hand in the US, moving roughly 900 to 1,200 units a year across boats from small cabin cruisers up to 75-foot yachts — a detail that matters if lower-volume, hands-on manufacturing factors into your purchase decision.

What to Know Before Installing

Pump is not included and must be sourced separately
Ducting requires both 6″ and 4″ runs, with at least three 4″ round supply grilles
Air discharge position must be specified before ordering
Since this unit has no heating function, confirm it matches your climate needs — there’s no field upgrade path without swapping the full unit

Brand	Mermaid Marine Air Conditioning
Full Model SKU/Code	M-6-C / M6-230V (Cool Only Configuration)
Country of Origin	USA
AC System Type	Self-Contained Direct-Expansion (DX) Marine AC
Cooling Capacity	6,500 BTU/h (1.9 kW)
Refrigerant Type	R-410A Pre-Charged Environmentally Graded Gas
Compressor Technology	High-Efficiency Hermetic Rotary Compressor
Operating Voltage / Frequency	220-240 Volts AC / 50 or 60 Hz Single Phase Platform
Full Load Amps / Running Current	Cooling Duty: 2.8 Amps at 230V Input Cycle
Locked Rotor Amps / Starting Current	14.0 Amps LRA Ultra-Low Start Curve
Recommended Circuit Breaker Rating	10 Amps Heavy-Duty Marine Breaker
Required Sea Water Flow Rate	200 GPH / 12.6 Liters per minute
Sea Water Inlet/Outlet Size	5/8" (16mm) Outer Diameter Hose Barb Connections
Duct Display / Air Discharge Size	4.0" (102mm) Dynamic Air Discharge Collar
Condenser Coil Material	Corrosion-Resistant Cupronickel (CuNi 90/10) Coaxial Heat Exchanger Tube
Control Interface Connectivity	Digital Programmable Thermostat Board / Analog Controller Knob Compatible Matrix
Dimensions (L x W x H)	36.8 cm x 29.2 cm x 29.2 cm / 14.5" x 11.5" x 11.5"
Dry Weight	18.1 kg / 40.0 lbs
Application	Dedicated cooling infrastructure for small sailboats, compact forward cuddy sleeper berths, small center consoles, and utility crew quarters (18-28 ft hulls)