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Mermaid M12 Cool & Reverse Cycle Marine A/C Unit - 12,000 BTU's - 110V

With a cooling capacity of 1,000 cubic feet, the Mermaid M12 is designed to cool / heat up to a 32′ cruiser or 34′ sailboat. The ultimate in climate control - the Mermaid 12,000 BTU marine air conditioner packs the perfect punch of cool, comfortable air to keep your cabin temperate. Reverse cycle heating feature. M12RC110. Digital Control / Thermostat included.

5-Year Warranty. Free US Shipping! 1 to 2 Weeks Lead Time. 


Reference: M12RC110T
Please Select Air Discharge Position

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Mermaid M12 Cool & Reverse Cycle Marine Air Conditioner - 12,000 BTU's - 110V

Mermaid M12 Cool & Reverse Cycle Unit 12,000 BTU's 110 V

With a cooling capacity of 1000 cubic feet, this unit is designed to cool / heat up to a 32′ cruiser or a 34′ sailboat.

The Mermaid 12,000 BTU marine air conditioner has the smallest footprint on the market and only weighs 31.5 pounds. It is the ultimate in climate control. Don’t mistake that compact size for impaired function, however; the Mermaid unit packs the perfect punch of cool, comfortable air to keep your cabin temperate. Thanks to the expertise of Mermaid's engineering and manufacturing team, even the electrical box on this unit only weighs 4.7 pounds. 

The Mermaid 12,000 BTU marine air conditioner also has rotatable blowers and tapers into a V shape to make odd angle discharge installations a breeze. 4″ ducting is used and Mermaid recommends a minimum of 2, 4″ round supply grills with this installation. This unit will run off of the new Honda EO1000i 1,000 watt portable generator while in cool mode. Another option Mermaid recommends is to use a Statpower pure sine wave 1,800 watt inverter and 450 amp hours of battery power and you can anchor out for the night.

Reverse cycle heating feature. All M12 Models include a digital thermostat. Pump Not Included.

With Reverse Cycle Heating 

With reverse cycle heating in a marine A/C unit, a reversing valve reverses the flow of freon. Normally the evaporator / fan blows cold into the cabin while the condenser expels the heat into the water. When reversed, the evaporator / fan blows heat into the cabin and the condenser expels the cold into the water. Unit BTU ratings are based on it’s cool mode. The reverse cycle heat mode produces 10-15% more BTU’s than the unit does in cooling mode.

Digital Control/Thermostat Options (Included w/Unit) - Select Programmable or Non-Programmable 

Programmable Thermostat
Mermaid Programmable ThermostatMermaid Digital Thermostat

Mermaid’s standard Digital Programmable Thermostat. Designed to be used with any Mermaid unit. 

Programmable features allow for weekday and weekend setting for those boater’s who care to use the unit for dehumidification or simply climate control while not on board. The thermostat is also accompanied with 20 feet of four-wire thermostat cable and installation instructions.

Dimensions: 4 1/2″ length x 1 1/4″ width x 3 1/4″ height

Non-Programmable Thermostat
Mermaid Non-Programmable Thermostat

As an alternative to the standard Digital Programmable Thermostat, Mermaid offers a simple Non-Programmable Thermostat that can be mounted vertically or horizontally. It is ideal for applications where programming features will not be necessary.

Simply turn the unit to HEAT or COOL, set the fan to AUTO (comes on with the unit) or ON (continuous duty), and set your desired temperature – and that's it! The thermostat will now maintain that set temperature until you turn it off or change the temperature. Again, this item is ideal for folks looking for a simple controller and a slimmer wall mount design. This can be a FREE alternative to your Programmable Thermostat upon purchase of any Mermaid Air System. 

Dimensions: 4 5/8″ length x 7/8″ width x 3 1/4″ height

Technical Specifications

Model M12
Cooling Capacity 12,000 BTU's
Voltage  110 V
Running Amperage 11.4 A
Unit Length 19.75 inches
Unit Width  13.00 inches
Unit Height  14.25 inches

Mermaid M-5 Cool Only Unit 5,200 BTU's

Mermaid Manufacturing - Top of the Line Marine Air Conditioning, Backed By 5 Year Warranty

Mermaid Manufacturing is so committed to delivering quality that they make all of their units by hand. Every unit is constructed of quality components assembled on solid stainless steel bases right here in the United States.

Mermaid has the right system for marine vessels ranging from the smallest cabin cruiser to a 75′ sailing yacht, selling between 900 - 1200 marine A/C units to happy customers each year. Every unit comes with a 5 year warranty against material defects and workmanship. For more details on the guarantee see downloads section below.

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