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CTM CT-6N – 6,000 BTU Marine Air Conditioner 115V 50/60HZ NMEA 2000
The CTM CT-6N supplies 6,000 BTU cooling from 115V 50/60HZ power with NMEA 2000 connectivity for compact onboard climate zones.
- 6,000 BTU capacity suits compact spaces.
- 115V input matches listed vessel systems.
- 50/60HZ rating covers listed frequencies.
- NMEA 2000 supports connected controls.
- Cooling output targets smaller cabins.
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Description
Not every small-cabin install has 230V available, and CTM’s CT-6N fills that gap with a 115V version of the same 6,000 BTU platform — titanium coils, NMEA 2000 support, and the same compact footprint that makes the 6K series a common choice for tight spaces like guest berths, heads, and small salons.
Key Features of the CTM CT-6N
- Titanium coils resist saltwater corrosion far better than the copper coils in comparable older units
- NMEA 2000 connectivity lets the unit report to and take commands from Garmin, Raymarine, or OneHelm helm displays
- Compact 4-inch duct ring suits boats where space is at a premium
- Reverse cycle heating covers both cooling and heating needs from one small unit
- Universal control board keeps most existing 115V-compatible thermostats usable after installation
CTM CT-6N Technical Specifications
- Cooling Capacity: 6,000 BTU
- Voltage / Frequency: 100–120V, 50/60 Hz
- Refrigerant: R410A
- Seawater Connections: 5/8″ (16 mm) inlet and outlet
- Dimensions (Depth x Width x Height): 15.65″ x 9.65″ x 11.2″
- Duct Ring Size: 4″ (102 mm)
- Connectivity: NMEA 2000 (Garmin EmpirBus, OneHelm, Raymarine YachtSense)
- [DATA MISSING: exact 115V current draw and locked rotor amps for the N-variant] — figures for the equivalent 115V CT-6 model are available on request; the N-series electrical specs were not published as a separate table at the time of writing and should be confirmed with CTM before finalizing an installation plan
Is the CT-6N Right for Your Boat?
This model exists specifically for boats without 230V power, running on standard 115V dockside or generator circuits instead. If 230V is available on your boat, the CT-6HN pulls less current for the same 6,000 BTU output and is generally the more efficient electrical match.
This unit is best suited to small, enclosed spaces — a single cabin, head, or berth — rather than open salons or larger staterooms that need more cooling capacity than 6,000 BTU provides.
What to Know Before Installing
- Confirm exact current draw and fuse requirements with CTM or a dealer before finalizing your electrical plan, since precise 115V figures for this specific N-variant weren’t available in the sources reviewed
- Ducting steps down to 4″, smaller than the 5″ or 6″ found on many OEM units it might replace
- Water connections are a standard 5/8″ fitting
- Universal control board compatibility should be double-checked against older SMXir or Passport I/O firmware versions
| Brand | CTM Marine |
| Model | CT-6N |
| Series | NMEA 2000 Ready |
| System Architecture | Self-Contained |
| Cooling Capacity | 6,000 BTU/h |
| Heating Capacity | 6,000 BTU/h |
| Voltage | 115V |
| Frequency | 50/60Hz |
| Phase | 1Ph |
| Running Amperage | 5.2A |
| Startup/LRA | 20A |
| Power Consumption | 600W |
| Refrigerant Type | R-410A |
| Compressor Type | Rotary |
| Condenser Coil | Cupro-Nickel |
| Air Flow Rate | 250 CFM |
| Dimensions - Unit | 400x280x280mm |
| Net Weight | 20kg |
| Noise Level | 48 dB(A) |
| Water Pump Req | 3.0 GPM |
| Duct Connection | 4" |
| Control Interface | NMEA 2000 |
| IP Rating | IP22 |
| Certifications | CE, ISO 8846 |
| Warranty | 2 Years |
What\'s in the Box
- 1x CT-6N 6000 BTU Self-Contained A/C Core
- 1x Digital Display Thermostat Interface Panel
- 1x Multi-Pin Thermostat Control Cable Harness
- 1x Integrated NMEA 2000 Circuit Control Board
- 1x Eco-Friendly R410A Refrigerant Charge
- 1x User Manual
CTM CT-6N AC FAQ
What network bridges to the CTM CT-6N?
An NMEA 2000 data backbone links directly to the self-contained CTM CT-6N marine climate control unit. This advanced digital connectivity network node routes internal temperature data and hardware diagnostics straight to your dashboard multi-function displays. It allows small cruiser owners to monitor cabin climate properties through centralized helm monitors.
How much current does a CTM CT-6N draw?
The CTM CT-6N draws an average running current of 3.8A when hooked to a standard 115V electrical grid. This exceptionally lean power requirement makes it an ideal cooling solution for pocket yachts running on small auxiliary generator lines. Rigging yards must plan for a 20A locked rotor startup spike before the cooling loop stabilizes.
What operational performance baselines run this climate system?
Delivering a continuous 6000 BTU cooling capacity across an integrated four-inch duct pipeline, this unit relies on these points:
| Technical Component | Certified Operational Parameters |
|---|---|
| Condenser Core | Heavy-duty titanium coil condenser heat exchanger engineered to resist corrosive raw marine water fields completely |
| Electrical Input | 115V single-phase power system cross-compatible with 50 Hz and 60 Hz shore frequencies natively |
| Weight Rating | Compact self-contained frame weighting exactly 40 lbs (18.1 kg) for easy under-bunk cabin bedding layouts |
| Application Base | Self-contained cooling system optimized to deliver the lowest amp draw configurations across small pleasure cruisers |
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