Mermaid M12 – Cool and Electric Heat Marine A/C Unit 12,000 BTU’s 110V
Mermaid M12 combines 12,000 BTU cooling and electric heat with 110V power for dual-mode onboard climate management.
- 12,000 BTU output supports cabin cooling.
- 110V supply matches listed installations.
- Electric heat adds heating functionality.
- Dual-mode operation supports seasonal use.
- Marine unit manages interior temperature.
$1,945.32
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Some boat owners need heat that doesn’t depend on the compressor or seawater system at all, and the Mermaid M12 Cool and Electric Heat covers that specific case — 12,000 BTU of standard cooling, plus a radiant heat strip that runs independently of the refrigeration system, useful for heating the cabin even when the boat is hauled out of the water.
Why Choose the Mermaid M12 Electric Heat
Electric heat mode draws roughly 8 more amps than the unit’s cooling mode, which matters on boats with limited generator or shore power capacity — confirm your electrical panel can handle that before choosing this configuration over reverse cycle. The upside is heat that works completely independent of the compressor and water system, something reverse cycle heating cannot do.
For boats that already have reliable seawater flow and want a more energy-efficient heating option, Mermaid’s Reverse Cycle configuration is generally the better fit — electric heat trades some efficiency for the ability to run without refrigeration engaged, or while the boat is on the hard.
What to Know Before Installing
- Confirm your electrical system can handle the 17.5A draw during electric heat operation
- Ducting and pump requirements match the standard M12 platform — pump not included
- This configuration is 110V only, based on the data reviewed
- Air discharge position must be specified before ordering
Product Specifications
Product Specifications
| Brand | Mermaid Marine Air |
|---|---|
| Exact Model Code / SKU | M12 (110V Electric Heat Variant) |
| Country of Origin | USA |
| System Architecture | Self-Contained Marine A/C System |
| Cooling Capacity - BTU/h | 12,000 BTU/h |
| Cooling Capacity - kW/Watts | 3.51 kW |
| Heating Capacity - BTU/h | 5,640 BTU/h (1.65 kW Electric Heating Element Integrated) |
| Reverse Cycle Heating Function | No (Uses Electric Resistance Heat Staging for constant heating output independent of seawater temperature) |
| Electrical Voltage | 110V |
| Alternating Current Frequency | 60 Hz |
| Electrical Phase | Single Phase |
| Full Load Amps - FLA Cooling | 9.5 A |
| Full Load Amps - FLA Heating | 15.0 A (Auxiliary Heat Loop Active Peak Draw) |
| Locked Rotor Amps - LRA | 40 A |
| Max Circuit Breaker Size | 25 A |
| Refrigerant Type | R-410A |
| Compressor Type | Hermetic Rotary |
| Seawater Water Flow Rate | 5.0 GPM (300 GPH) |
| Seawater Inlet Pipe Size | 5/8 inch (16 mm) |
| Seawater Outlet Pipe Size | 5/8 inch (16 mm) |
| Evaporator Airflow Capacity | 400 CFM |
| Duct Discharge Connection Diameter | 6 inches (152 mm) |
| Condensate Drain Connection Size | 1/2 inch (12.7 mm) |
| Physical Dimensions - Unit | 11.5 x 16.0 x 12.0 inches (292 x 406 x 305 mm) |
| Net Weight | 58 lbs (26.3 kg) |
| Chassis & Condenser Material | Stainless Steel Pan & Cupronickel Condenser Loop |
| Standard Factory Warranty | 5 Years |
| Application & Sizing Guidance | Optimized for northern or freshwater installations where cold lakes/seawater would degrade reverse-cycle heat loops; services areas up to 500 cu.ft, min generator 3.5 kW. |
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