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Marine Air Conditioner Specifications
Mulmarine marine air conditioners provide 7,000-48,000 BTU cooling using seawater-cooled self-contained units with rotary/scroll compressors, cupronickel condenser coils, titanium heat exchangers, and corrosion-resistant evaporator fins. Chilled water systems deliver 16K-120K BTU capacity for yachts up to 120ft featuring digital touch controls, variable speed EC fans, self-diagnostic systems, and humidity control for reliable climate comfort in tropical cruising conditions.
Performance and Customer Reviews
Mulmarine AC systems earn 4.7/5 stars from 650+ liveaboard reviews praising rapid cabin cooling, ultra-quiet operation, low generator runtime versus Dometic/Marine Air competitors, and proven Caribbean charter season durability—perfect for maintaining comfortable sleeping quarters worldwide without excessive power consumption.
- 20°F cabin temp drop in 15 minutes.
- Seawater cooling independent of engines.
- Titanium exchangers resist salt corrosion.
- Low amperage preserves battery capacity.
- Captain-trusted reliability prevents discomfort.
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CTM CT-25HN Marine AC - 25,000 BTU (NMEA 2000) utilizes a flagship high-capacity thermal architecture, serving as the premier single-unit solution for expansive yacht salons and open-concept deck houses. This 230V system delivers a massive 25,000 BTUs and features integrated NMEA 2000® connectivity, allowing for sophisticated multi-zone climate management and real-time power monitoring via the vessel's primary glass bridge displays.
- Thermal Output: 25,000 BTU/hr with NMEA 2000 digital control.
- Compressor Type: Heavy-duty high-output rotary compressor.
- Power Requirements: 230V AC / 50-60Hz Single Phase.
- Vessel Integration: Engineered for flagship salons and large open-deck areas.
- Warranty Coverage: CTM Marine 2-year limited factory protection.
CTM CT-16HN Marine AC - 16,000 BTU (NMEA 2000) utilizes a flagship high-capacity propulsion design for 230V networked yachts, delivering 16,000 BTUs of reliable climate control. This unit features a heavy-duty cupronickel condenser and advanced digital monitoring, providing the brute thermal force and system transparency needed for flagship vessels operating in the most demanding tropical sea states.
- Thermal Output: 16,000 BTU/hr with NMEA 2000 connectivity.
- Compressor Type: 230V heavy-duty high-output rotary compressor.
- Power Requirements: 230V AC / 50-60Hz Single Phase.
- Vessel Integration: Optimized for large international-spec yachts.
- Warranty Coverage: CTM Marine 2-year limited factory protection.
CTM CT-16N Marine AC - 16,000 BTU (NMEA 2000) features a premier high-capacity thermal architecture designed for 115V flagship salons. Delivering a massive 16,000 BTUs, this unit integrates seamlessly with NMEA 2000® networks, allowing for centralized climate management across expansive open-concept interiors while utilizing a specialized evaporative coil for maximum dehumidification performance.
- Thermal Output: 16,000 BTU/hr with NMEA 2000 digital control.
- Compressor Type: Powerful 115V hermetic rotary compressor.
- Power Requirements: 115V AC / 60Hz Single Phase.
- Vessel Integration: Engineered for flagship salons and large master suites.
- Warranty Coverage: CTM Marine 2-year limited factory protection.
CTM CT-12HN Marine AC - 12,000 BTU (NMEA 2000) utilizes an efficient 4-cycle thermal exchange suite for the 230V international market, featuring full NMEA 2000® integration. This 12,000 BTU unit incorporates a high-efficiency condensate management system and high-velocity airflow, delivering consistent thermal regulation and real-time status updates for technical yacht interiors and luxury cabins.
- Thermal Output: 12,000 BTU/hr with NMEA 2000 control.
- Compressor Type: 230V high-efficiency rotary unit.
- Power Requirements: 230V AC / 50-60Hz Single Phase.
- Vessel Integration: Best for international-spec networked cruisers.
- Warranty Coverage: CTM Marine 2-year limited factory protection.
CTM CT-12N Marine AC - 12,000 BTU (NMEA 2000) features a flagship 115V climate control design for networked marine environments. Delivering a balanced 12,000 BTUs, this unit utilizes an advanced electronic control board and a high-efficiency heat exchanger, providing the thermal grunt and digital precision required for primary staterooms on modern recreational vessels with integrated bridge systems.
- Thermal Output: 12,000 BTU/hr with NMEA 2000 monitoring.
- Compressor Type: High-performance 115V rotary compressor.
- Power Requirements: 115V AC / 50-60Hz Single Phase.
- Vessel Integration: Ideal for master suites and networked salons.
- Warranty Coverage: CTM Marine 2-year limited factory protection.
CTM CT-10DCN Hybrid - 10,000 BTU (NMEA 2000) utilizes a premier hybrid propulsion architecture engineered for high-efficiency operation on 12V DC or 115V AC power. This 10,000 BTU unit features a specialized BLDC inverter compressor and NMEA 2000® connectivity, delivering elite climate control with a minimal electrical footprint, making it the flagship choice for off-grid sailboats and overnight battery-powered cooling.
- Thermal Output: 10,000 BTU/hr with DC Inverter technology.
- Connectivity: Integrated NMEA 2000 system interface.
- Power Requirements: 12V DC / 115V AC Dual-Source Compatibility.
- Vessel Integration: Elite choice for energy-conscious off-grid vessels.
- Warranty Coverage: CTM Marine 2-year limited factory protection.
CTM CT-10HN Marine AC - 10,000 BTU (NMEA 2000) features a refined high-density power design for 230V global grids, incorporating a full CAN-bus interface. Delivering 10,000 BTUs, this model utilizes an anti-corrosive titanium-condenser variant option and a rotatable high-velocity blower, providing the real-time data feedback and thermal stability required for digitally networked guest staterooms.
- Thermal Output: 10,000 BTU/hr with NMEA 2000 monitoring.
- Compressor Type: Industrial-grade 230V rotary unit.
- Power Requirements: 230V AC / 50-60Hz Single Phase.
- Vessel Integration: Optimized for networked guest suites and mid-sized cabins.
- Warranty Coverage: CTM Marine 2-year limited factory protection.
CTM CT-6HN Marine AC - 6,000 BTU (NMEA 2000) utilizes a flagship digital propulsion architecture for climate control, featuring integrated NMEA 2000® connectivity for elite vessel integration. This 230V unit delivers 6,000 BTUs of reverse-cycle power, allowing users to monitor and control cabin temperatures directly through their primary helm displays while enjoying whisper-quiet operation in v-berths.
- Thermal Output: 6,000 BTU/hr with NMEA 2000 digital control.
- Compressor Type: High-efficiency 230V hermetic rotary compressor.
- Power Requirements: 230V AC / 50-60Hz Single Phase.
- Vessel Integration: Perfect for smart-yacht v-berths and localized zones.
- Warranty Coverage: CTM Marine 2-year limited factory protection.
Network-integrated climate controls define the operational profile of the CTM CT-6N, a self-contained 6,000 BTU marine cooling unit that plugs directly into existing vessel electronics backbones for remote monitoring.
- NMEA 2000 compatibility enables multi-device helm tracking.
- Low 3.8A draw keeps electrical consumption minimal.
- Titanium coils eliminate galvanic seawater corrosion risks.
- Compact 4-inch ducting fits small cabin spaces easily.
- 40-pound self-contained footprint simplifies tight interior installations.
Mermaid M12 Cool Only - 12,000 BTU (110V) utilizes a robust 4-stroke industrial cooling architecture specifically tuned for the North American market. This 12,000 BTU unit features a 304-grade stainless steel chassis and a heavy-duty rotary compressor, providing the mechanical simplicity and high-load durability required for mid-sized cabins where dedicated cooling and maximum moisture removal are the primary operational priorities.
- Thermal Output: 12,000 BTU/hr dedicated cooling only.
- System Layout: Robust stainless steel self-contained architecture.
- Power Requirements: 110V AC / 60Hz Single Phase.
- Vessel Integration: Recommended for 32–40 foot recreational motorboats.
- Warranty Coverage: Mermaid 5-year limited factory protection.
Mermaid M9 Cool & Reverse Cycle - 9,000 BTU (230V) features a premier 230V dual-mode thermal architecture designed for European and Australian vessel grids. Delivering 9,000 BTUs of cooling and heating, this model incorporates a high-velocity blower and an "over-built" refrigeration circuit, ensuring the rapid temperature regulation and superior dehumidification required for flagship interiors in tropical saltwater environments.
- Thermal Output: 9,000 BTU/hr Cooling and Reverse-Cycle Heat.
- System Layout: Compact 230V self-contained stainless steel frame.
- Power Requirements: 230V AC / 50-60Hz Single Phase.
- Vessel Integration: Optimized for luxury international motorboats and sailboats.
- Warranty Coverage: Mermaid 5-year limited factory protection.
Mermaid M9 Cool & Reverse Cycle - 9,000 BTU (220V) utilizes a refined 4-cycle thermal exchange design engineered for the 220V international maritime market. This 9,000 BTU self-contained unit features a high-efficiency reversing valve and a specialized cupronickel condenser, providing elite cooling and heating performance while maintaining a compact footprint for discrete installation in mid-sized guest cabins and master staterooms.
- Thermal Output: 9,000 BTU/hr Cooling and Reverse-Cycle Heat.
- System Layout: Heavy-duty 304 stainless steel base and housing.
- Power Requirements: 220V AC / 50-60Hz Dual Frequency.
- Vessel Integration: Ideal for international-spec cruisers and motor yachts.
- Warranty Coverage: Mermaid 5-year limited factory protection.
Mermaid M9 Cool & Reverse Cycle - 9,000 BTU (110V) features a premier 4-cycle thermal exchange design specifically for the North American marine market. Delivering 9,000 BTUs of cooling and heat recovery, this model utilizes a high-efficiency reversing valve and a specialized condensate management system, providing the thermal stability and whisper-quiet operation preferred for luxury sailboat and motor cruiser interiors.
- Thermal Output: 9,000 BTU/hr Cooling and Reverse-Cycle Heat.
- System Layout: Compact 110V self-contained stainless steel frame.
- Power Requirements: 110V AC / 60Hz Single Phase.
- Vessel Integration: Perfect for master suites and salons.
- Warranty Coverage: Mermaid 5-year limited factory protection.
Utilizing an integrated heat strip that functions completely independently of external sea temperatures, the Mermaid M9 gives domestic boat owners reliable 9,000 BTU cooling or raw winter heating power.
- 110V single-phase electrical framework fits standard US docks.
- 7.8A cooling draw operates efficiently on small generators.
- Marine grade stainless steel base defeats corrosive condensate.
- 5-inch duct size optimizes balanced cabin air distribution.
- Electric heating elements warm spaces during freezing winter dockage.
Mermaid M9 Cool Only - 9,000 BTU (230V) features a refined high-density power design for 230V global compatibility. This 9,000 BTU model utilizes an oversized evaporative coil and a high-velocity blower, providing the brute thermal grunt and rapid cooling response required for master staterooms on yachts operating in extreme high-humidity tropical saltwater environments.
- Thermal Output: 9,000 BTU/hr dedicated cooling only.
- System Layout: Heavy-gauge 304 Stainless Steel construction.
- Power Requirements: 230V AC / 50-60Hz Single Phase.
- Vessel Integration: Recommended for flagship international staterooms.
- Warranty Coverage: Mermaid 5-year limited factory protection.
Mermaid M9 Cool Only - 9,000 BTU (220V) utilizes a robust industrial cooling architecture designed for 220V offshore vessels. Delivering 9,000 BTUs of dedicated cooling power, this unit focuses on maximum dehumidification and rapid air temperature reduction, utilizing a robust mechanical interface and industrial-grade components to ensure long-term durability in mid-sized cabins and technical zones.
- Thermal Output: 9,000 BTU/hr dedicated cooling only.
- System Layout: High-efficiency stainless steel self-contained unit.
- Power Requirements: 220V AC / 50-60Hz Dual Frequency.
- Vessel Integration: Ideal for guest staterooms and mid-sized interiors.
- Warranty Coverage: Mermaid 5-year limited factory protection.
Mermaid M9 Cool Only - 9,000 BTU utilizes an efficient 4-cycle cooling architecture specifically tuned for high-humidity coastal environments. Delivering 9,000 BTUs of dedicated cooling power, this 110V model focuses on maximum moisture removal and rapid air temperature reduction, utilizing a robust mechanical thermostat and industrial-grade components to ensure long-term durability in small motorboats and guest quarters.
- Thermal Output: 9,000 BTU/hr Dedicated Cooling.
- System Layout: Heavy-duty stainless steel base and housing.
- Power Requirements: 110V AC / 60Hz Single Phase.
- Vessel Integration: Optimized for small cabins and technical spaces.
- Warranty Coverage: Mermaid 5-year limited factory protection.
Mermaid M6 Cool & Reverse Cycle - 6,500 BTU (230V) features a flagship 230V propulsion design for dual-season thermal stability. Delivering 6,500 BTUs of cooling and heating, this model utilizes an "over-built" thermal circuit and a cupronickel heat exchanger to prevent electrolysis, ensuring the precise temperature regulation required for discrete installation in high-end yacht cabins.
- Thermal Output: 6,500 BTU/hr Cooling and Reverse-Cycle Heat.
- System Layout: Compact 230V stainless steel architecture.
- Power Requirements: 230V AC / 50-60Hz Single Phase.
- Vessel Integration: Optimized for luxury international cruisers and tenders.
- Warranty Coverage: Mermaid 5-year limited factory protection.
Mermaid M6 Cool & Reverse Cycle - 6,500 BTU (220V) utilizes a refined 4-cycle reverse-cycle heating and cooling design for the 220V market. This model incorporates a high-efficiency reversing valve and a specialized vibration-isolating base, providing 6,500 BTUs of dual-season comfort with a whisper-quiet acoustic profile, ideal for localized elite climate control on international motor yachts.
- Thermal Output: 6,500 BTU/hr Cooling and Reverse-Cycle Heat.
- System Layout: International-spec 220V self-contained unit.
- Power Requirements: 220V AC / 50-60Hz Dual Frequency.
- Vessel Integration: Best for small guest staterooms and tech rooms.
- Warranty Coverage: Mermaid 5-year limited factory protection.
Mermaid M6 Cool & Reverse Cycle - 6,500 BTU features a refined compact thermal design engineered for the sailboat auxiliary and small cruiser market. This 110V unit utilizes a 4-cycle reverse-cycle heating and cooling architecture, providing 6,500 BTUs of localized climate control with a stainless steel condensate tray and a high-velocity blower, ensuring a dry and comfortable atmosphere for v-berths and small cabins.
- Thermal Output: 6,500 BTU/hr Cooling and Heating.
- System Layout: Compact self-contained 304 stainless steel frame.
- Power Requirements: 110V AC / 60Hz Single Phase.
- Vessel Integration: Perfect for v-berths and small sailing yachts.
- Warranty Coverage: Mermaid 5-year limited factory protection.
Mermaid M6 Cool & Electric Heat - 6,500 BTU features a premier 110V dual-mode thermal architecture incorporating a high-output resistive heating element. This 6,500 BTU unit is engineered to provide immediate, dry warmth regardless of seawater temperature, bypassing the limitations of reverse-cycle systems to deliver elite climate control and superior moisture removal for v-berths in near-freezing water conditions.
- Thermal Output: 6,500 BTU Cooling with Electric Heat.
- Heating Type: Industrial-grade resistive electric heating.
- Power Requirements: 110V AC / 60Hz Single Phase.
- Vessel Integration: Perfect for small cabins in temperate/cold climates.
- Warranty Coverage: Mermaid 5-year limited factory protection.
Inside cramped cuddy cabins and tight small-cruiser berths, the Mermaid M6 supplies an ultra-compact 6,500 BTU climate footprint configured to eliminate heavy humidity while utilizing minimal space.
- Low 2.6A running current draw prevents battery depletion.
- Featherweight 39 lbs build ensures simple panel mounting.
- Standard 4-inch duct size routes through narrow bulkheads.
- 12A startup current prevents tripping dockside shorepower breakers.
- Cooling-only configuration maximizes internal space engineering efficiency.
Mermaid M6 Cool Only - 6,500 BTU (220V) features a refined clean-running boat motor design for air circulation, tuned for 220V international maritime electrical grids. Delivering 6,500 BTUs of cooling, this model utilizes a specialized cupronickel condenser and a high-velocity blower to provide elite dehumidification and stable air distribution for guest quarters on yachts traversing varied global climate zones.
- Thermal Output: 6,500 BTU/hr dedicated cooling only.
- System Layout: Heavy-duty stainless steel base and housing.
- Power Requirements: 220V AC / 50-60Hz Dual Frequency.
- Vessel Integration: Ideal for international small cabins and crew quarters.
- Warranty Coverage: Mermaid 5-year limited factory protection.
Mermaid M6 Cool Only - 6,500 BTU (110V) utilizes a robust 4-cycle cooling architecture specifically engineered for sailboats and small powerboats. This 110V self-contained unit features a high-grade 304 stainless steel base and a compact footprint, delivering 6,500 BTUs of dedicated cooling power with a low startup amperage, making it the premier choice for localized climate control in v-berths and small cabins without the complexity of a reversing valve.
- Thermal Output: 6,500 BTU/hr dedicated cooling only.
- System Layout: Compact 304-grade stainless steel chassis.
- Power Requirements: 110V AC / 60Hz Single Phase.
- Vessel Integration: Optimized for small sailboats and mid-range cruisers.
- Warranty Coverage: Mermaid 5-year limited factory protection.
Mermaid M3 Reverse Cycle - 3,500 BTU features a refined 4-cycle thermal exchange design, serving as one of the smallest reverse-cycle units available in the marine market. Delivering 3,500 BTUs of cooling and heating, this 120V model incorporates a high-efficiency reversing valve and a whisper-quiet blower, providing the thermal stability and dehumidification required for discrete installation in guest cabins or technical rooms.
- Thermal Output: 3,500 BTU/hr Cooling and Reverse-Cycle Heat.
- System Layout: Ultra-compact self-contained stainless steel frame.
- Power Requirements: 120V AC / 60Hz Single Phase.
- Vessel Integration: Ideal for small cabins and technical technical spaces.
- Warranty Coverage: Mermaid 5-year limited factory protection.
Mermaid M3 Cool Only - 3,500 BTU utilizes a compact high-performance architecture designed for the most confined technical spaces and small v-berths. This 120V unit provides 3,500 BTUs of dedicated cooling power with a minimal electrical draw, utilizing a robust 304 stainless steel base and a localized blower housing to ensure precision temperature regulation for small sailing yachts and overnight cruisers.
- Thermal Output: 3,500 BTU/hr dedicated cooling only.
- System Layout: Ultra-compact self-contained stainless steel frame.
- Power Requirements: 120V AC / 60Hz Single Phase.
- Vessel Integration: Recommended for small v-berths and localized zones.
- Warranty Coverage: Mermaid 5-year limited factory protection.
Flagship FM18RLP Heat/Cool LP - 18,000 BTU (230V) features a flagship dual-mode thermal architecture designed for high-end international yachts with restricted cabinetry depth. This 230V model provides 18,000 BTUs of cooling and electric heating, utilizing an oversized evaporative coil and specialized vibration isolation to deliver elite climate control and whisper-quiet operation in a low-profile format.
- Thermal Output: 18,000 BTU Cooling with Electric Heat.
- Chassis Design: 12-inch height Low Profile stainless steel.
- Power Requirements: 230V AC / 50-60Hz Single Phase.
- Vessel Integration: Optimized for luxury international cruisers and motorboats.
- Warranty Coverage: Flagship 5-year parts / 1-year labor.
Flagship FM18RLP Heat/Cool LP - 18,000 BTU (115V) utilizes an efficient 4-cycle thermal exchange suite delivering 18,000 BTUs of cooling and integrated electric heat in a space-saving chassis. This 115V unit is engineered to fit into narrow voids while providing the brute thermal force necessary for large cabins, utilizing a high-output resistive heat strip to ensure a dry, smoke-free atmosphere regardless of external conditions.
- Thermal Output: 18,000 BTU Cooling with Electric Heat.
- Chassis Design: 12-inch height Low Profile stainless steel.
- Power Requirements: 115V AC / 60Hz Single Phase.
- Vessel Integration: Best for salons and primary cabins with height limits.
- Warranty Coverage: Flagship 5-year parts / 1-year labor.
