CTM CT-6HS – 6000 BTU Marine Air Conditioner 230V w/ Soft Start
When it comes to marine comfort, the CTM CT-6HS – 6000 BTU Marine Air Conditioner 230V w/ Soft Start sets a new standard in efficiency, reliability, and long-lasting performance. Designed specifically for boaters who demand quiet, powerful cooling and versatile heating, this marine air conditioner combines advanced engineering with corrosion-resistant materials to ensure your vessel stays comfortable in any environment.
This self-contained unit is ideal for both new installations and drop-in replacements for major marine A/C brands such as Dometic, Cruisair, Marine Air, and Webasto. With titanium coils, stainless steel components, and an industry-standard soft start system, the CTM CT-6HS is built to withstand the toughest marine conditions while minimizing power draw.
Key Features of the CTM CT-6HS Marine Air Conditioner
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Capacity: 6,000 BTU cooling
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Voltage: 230V, 50/60Hz dual frequency
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Refrigerant Type: R410A
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Reverse Cycle Heating: Switch between cooling and heating as needed
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Soft Start Technology: Reduces start-up current by up to 75%, ideal for generators or limited power sources
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Durable Construction: Titanium coils, stainless steel bolts, ABS structural pan
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Quiet Operation: High-velocity blower ensures fast cooling with minimal noise
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2-Year Warranty: Peace of mind with parts and labor coverage
Why CTM CT-6HS Stands Out
Unlike many marine air conditioners, the CTM CT-6HS focuses on performance without compromise. Here’s why it’s a top choice:
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Soft Start Advantage
The soft start system ramps up the compressor in four phases, significantly reducing initial power draw. This allows you to:-
Operate on smaller generators
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Run multiple appliances simultaneously
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Sleep comfortably without generator noise
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Corrosion-Resistant Design
Titanium circulating coils outperform copper by 40% in corrosion resistance, making them perfect for saltwater environments. The stainless steel frame and ABS pan further enhance durability, preventing rust and structural degradation over time. -
Universal Compatibility
The CTM CT-6HS works seamlessly with most marine controllers and thermostats, including:-
Dometic
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Cruisair
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Marine Air
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Micro Air
This universal control board ensures easy replacement and retrofitting without complicated rewiring.
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Compact and Lightweight
At just 41 lbs (19 kg), this unit fits into small spaces without sacrificing power. Its rotatable high-velocity blower (up to 250°) ensures rapid and even cooling throughout the cabin.
Installation and Replacement Tips
Installing or replacing a marine air conditioner can be challenging, but the CTM CT-6HS simplifies the process:
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Drop-In Replacement: Compatible with part numbers from Dometic DTG6, DTU6, Cruisair STQ6, STX6, Marine Air VTD6K, and more.
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Ducting Considerations: Minimum duct diameter 4 in / 102 mm; cinch down with standard clamps for tight fit.
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Seawater Pump: Recommended CTM PM500LH 500 GPH, 230V for optimal water flow.
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Control Compatibility: Works with Elite II, Smart Touch, Passport I/O, and SMXir controllers.
Pro Tip: Always verify waterline connections and ducting sizes before replacing older models to prevent installation delays.
CTM CT-6HS vs Competitors
| Feature | CTM CT-6HS | Dometic DTG6 | Cruisair STX6 | Marine Air VTD6K |
|---|---|---|---|---|
| Cooling Capacity | 6,000 BTU | 6,000 BTU | 6,000 BTU | 6,000 BTU |
| Voltage | 230V | 230V | 230V | 230V |
| Soft Start | ✅ | ❌ | ❌ | ❌ |
| Titanium Coils | ✅ | ❌ | ❌ | ❌ |
| Reverse Cycle Heating | ✅ | ✅ | ✅ | ✅ |
| Noise Level | Low | Moderate | Moderate | Moderate |
Expert Insight: The CTM CT-6HS delivers superior efficiency and longevity thanks to its corrosion-resistant materials and soft-start technology—features often lacking in older Dometic or Cruisair units.
Practical Usage Tips
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Maximize Efficiency: Run the soft start feature during peak power usage to reduce strain on your generator or shore power.
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Regular Maintenance: Inspect titanium coils and clean seawater intake regularly to prevent scaling and maintain airflow.
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Reverse Cycle Heating: In colder climates or night use, switch to heating to maintain cabin comfort without auxiliary heaters.
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Noise Reduction: Ensure the blower rotation is unobstructed; small adjustments can improve quiet operation significantly.
Expert Recommendation
Boaters consistently report that the CTM CT-6HS is the ideal choice for both sailboats and powerboats requiring compact, reliable, and quiet climate control. Its combination of soft start technology, universal compatibility, and anti-corrosion design makes it a superior long-term investment.
Example: A 40-foot sailboat replacing its Dometic DTG6 with a CTM CT-6HS reduced electrical load by 30% while maintaining consistent cooling—even during peak summer temperatures.
CTM CT-6HS Specifications
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Capacity: 6,000 BTU
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Voltage: 208–230V
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Cycle: 50/60 Hz
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Current Consumption: 2.1 A cooling / 2.7 A heating
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Starting Amps: 7 A
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Locked Rotor Amps: 35 A
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Fuse Max/Min: 15 A / 10 A
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Blower Airflow: 282 CFM
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Blower Speed: 2,000 RPM
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High-Velocity Blower: Yes, rotatable <250°
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Seawater Inlet: 5/8″ (16 mm)
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Suggested Water Flow: 250 GPH
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Net Weight: 41 lbs / 19 kg
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Warranty: 2 years
Why Choose CTM Marine Air Conditioners
CTM marine A/C units combine nearly a decade of US-based marine air conditioning experience with top-tier customer service. Key benefits include:
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Fully compatible with major marine controls
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Quick installation as drop-in replacements
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Soft start for energy efficiency and generator compatibility
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Quiet, reliable, and long-lasting performance
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Corrosion-resistant design built for harsh marine conditions
Pro Tip: Register your CTM CT-6HS for the full 2-year warranty and get dedicated customer support.
Conclusion
The CTM CT-6HS – 6000 BTU Marine Air Conditioner – 230V – 50/60HZ w/ Soft Start is a top-tier choice for boaters seeking reliability, quiet operation, and long-lasting performance. Its corrosion-resistant titanium coils, soft start technology, and universal control compatibility make it the best drop-in replacement for older systems while providing superior efficiency and comfort. Whether installing new or upgrading an existing system, the CTM CT-6HS ensures your marine environment remains cool, comfortable, and energy-efficient. Contact us
CTM CT-6HS – 6000 BTU Marine Air Conditioner 230V w/ Soft Start
Q1: What size boat is the CTM CT-6HS suitable for?
A1: The 6,000 BTU capacity is ideal for small to mid-sized boats, including sailboats and powerboats up to 40 feet.
Q2: Can the CTM CT-6HS replace a Dometic DTG6?
A2: Yes, it is fully compatible with Dometic DTG6, DTU6, Cruisair STX6, and Marine Air VTD6K units.
Q3: Does the CTM CT-6HS have reverse cycle heating?
A3: Yes, it can provide both cooling and heating, allowing year-round comfort.
Q4: What is soft start, and why is it important?
A4: Soft start reduces initial power draw by up to 75%, allowing the unit to run efficiently on generators and in limited power scenarios.
Q5: Is the CTM CT-6HS quiet?
A5: Yes, the high-velocity blower operates quietly, making it ideal for overnight use.
Q6: What type of coils does the CTM CT-6HS use?
A6: It uses titanium coils, which are highly corrosion-resistant and ideal for marine environments.
Q7: What warranty comes with the CTM CT-6HS?
A7: Registered units come with a 2-year warranty covering parts and labor for the first year and parts only for the second year.
Q8: Can I use the CTM CT-6HS with existing Dometic or Cruisair controllers?
A8: Yes, it is compatible with most major marine controllers, including Elite II, Smart Touch, Passport I/O, and SMXir.











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