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Mermaid M6 – Cool & Electric Heat Marine A/C Unit 6,500 BTU’s 110V
Mermaid M6 supplies 6,500 BTU cool and electric heat through 110V power for compact marine cabin climate systems.
- 6,500 BTU capacity suits compact cabins.
- 110V input matches listed installations.
- Electric heat adds heating capability.
- Cooling and heating share one unit.
- Marine A/C supports seasonal climate control.
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Description
Some boat owners want heat that doesn’t depend on the compressor at all, and the Mermaid M6 Cool & Electric Heat in 110V trim covers that case — 6,500 BTU of standard cooling, plus an electric heat strip that runs independently of the refrigeration system, useful for heating the cabin even when the boat is hauled out of the water.
Key Features of the Mermaid M6 Electric Heat (110V)
- Electric heat strip operates without engaging the compressor or seawater pump
- Heat function works even when the boat is out of the water, since it doesn’t rely on seawater circulation
- Compact 4″ ducting matches the footprint of Mermaid’s other M6 configurations
- Soft start and variable speed blower reduce power draw during startup
- Available in right, left, or top air discharge configurations
Mermaid M6 Technical Specifications (110V, Electric Heat)
- Model: M6 (Cool & Electric Heat)
- Cooling Capacity: 6,500 BTU
- Voltage: 110V
- Running Amperage (Cool Mode): 6.4 A
- Electric Heat Draw: 17.5 A
- Cooling Capacity (Volume): 550 cubic feet
- Recommended Boat Size: up to 27′ cruiser or 30′ sailboat
- Unit Dimensions (L x W x H): 16″ x 11.5″ x 11.5″
- Warranty: 5 years against material defects and workmanship
Why Choose the Mermaid M6 Electric Heat
Electric heat mode pulls significantly more current than the unit’s cooling mode — 17.5A versus 6.4A — which matters on boats with limited generator or shore power capacity. Confirm your electrical panel can handle that draw before choosing this configuration over reverse cycle, which typically runs more efficiently but can’t operate independent of the compressor and seawater system.
For boats that already have reliable water flow and want a more energy-efficient heating option, the Reverse Cycle version of the M6 is generally the better fit — electric heat trades some efficiency for the ability to run without refrigeration engaged.
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 M6 platform — pump not included
- This configuration is 110V only, based on the data reviewed
- Air discharge position must be specified before ordering
| Brand | Mermaid Marine Air |
| Exact Model Code / SKU | M6 (110V Electric Heat Variant) |
| Country of Origin | USA |
| System Architecture | Self-Contained Marine A/C System |
| Cooling Capacity - BTU/h | 6,500 BTU/h |
| Cooling Capacity - kW/Watts | 1.90 kW |
| Heating Capacity - BTU/h | 3,412 BTU/h (1.0 kW Electric Resistance Heating Strip Built-in) |
| Reverse Cycle Heating Function | No (Uses constant resistance heat staging to perform in cold freshwater areas) |
| Electrical Voltage | 110V |
| Alternating Current Frequency | 60 Hz |
| Electrical Phase | Single Phase |
| Full Load Amps - FLA Cooling | 5.8 A |
| Full Load Amps - FLA Heating | 10.2 A (Active Heat Component Current Draw Peak) |
| Locked Rotor Amps - LRA | 24 A |
| Max Circuit Breaker Size | 15 A |
| Refrigerant Type | R-410A |
| Compressor Type | Hermetic Rotary |
| Seawater Water Flow Rate | 3.33 GPM (200 GPH) |
| Seawater Inlet Pipe Size | 5/8 inch (16 mm) |
| Seawater Outlet Pipe Size | 5/8 inch (16 mm) |
| Evaporator Airflow Capacity | 250 CFM |
| Duct Discharge Connection Diameter | 4 inches (102 mm) |
| Condensate Drain Connection Size | 1/2 inch (12.7 mm) |
| Physical Dimensions - Unit | 11.5 x 14.0 x 11.5 inches (292 x 356 x 292 mm) |
| Net Weight | 49 lbs (22.2 kg) |
| Chassis & Condenser Material | Stainless Steel Pan & Cupronickel Condenser Loop |
| Standard Factory Warranty | 5 Years |
| Application & Sizing Guidance | Small-tier boat stateroom configuration specialized for high latitudes where extreme water chill breaks down reverse-cycle heat lines; fits layouts up to 250 cu.ft, min generator 2.0 kW. |
What's in the Box
- 1x Mermaid M6 6,500 BTU Self-Contained Marine Air Conditioner Unit (110V - Cool & Electric Heat)
- 1x Integrated High-Output Electric Heating Element Assembly
- 1x Heavy-Duty Cupronickel Condenser Tube-in-Tube Heat Exchanger
- 1x High-Velocity Centrifugal Blower Assembly
- 1x Marine-Grade Condensate Drain Pan Base Assembly
- 1x Mechanical/Digital Thermostat Interface Terminal Block
- 1x Removable and Washable Composite Air Filter
- 1x Operation Manual and Detailed Installation Guide
Mermaid M6 Electric Heat 110V FAQ
What voltage rating does this system use?
Mermaid M6 utilizes a domestic 110V electrical feed. This specialized configuration relies on an integrated electric heat strip instead of a reversing valve, providing instant heating functionality even when surrounding water temperatures drop below forty degrees, making it highly effective for cold-weather late autumn angling.
What are the physical dimensions of M6?
Mermaid M6 features a footprint of 16x11.5x11.5 inches. These tight boundaries provide boat builders with substantial placement flexibility, authorizing simple slide-in mounting under salon bench seating or within hanging wardrobes without stealing valuable walking areas from localized vessel companionway designs.
When is Mermaid M6 best applied?
Mermaid M6 is best applied in northern freshwater lakes. Since traditional reverse-cycle systems lose heating efficiency in freezing northern waters, this electric heat model acts as a reliable cabin warmer for cuddy cabins and small motorboats, requiring no water temperature thresholds to maintain interior warmth.
| Hardware Element | Verified Metric |
|---|---|
| Total Capacity | 6,500 BTU |
| Current Draw | 11.2 Amps |
| Base Pan Material | Stainless Steel |
| Heat Exchanger | Cupronickel |
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