Air Conditioning

Keeping the below-deck environment livable when temperatures rise requires proper management of the available space. A marine air conditioning system must cope with brackish humidity, constant vibrations, and a limited energy budget. Before choosing, always assess the actual volume of the spaces to be treated and the availability of shore power or a generator.

Installing an air conditioner means integrating a complex circuit that requires seawater piping, circulation pumps, and dedicated discharge lines. The main risk is undersizing, which forces the unit into continuous operation without dehumidifying, or oversizing, which causes excessively frequent start-stop cycles that are harmful to the compressor. At Nautiba, we analyze your system configuration to ensure every component is consistent with the technical specifications.

Our pre-sales technical support exists precisely for this purpose: to prevent you from ending up with a system that is difficult to install or incompatible with your existing seacocks. When you review our product pages, always verify fluid flow rates and fitting diameters. We are here to guide you toward well-considered choices, based on a realistic ETA and the availability of all components needed to complete the installation.

Critical parameters for your system

Selecting an air conditioner involves a few fundamental technical constraints. Do not look only at the nominal output; check how the unit integrates with your boat's specific characteristics.

  • Evaluate BTU output relative to the volume of the spaces and the thermal insulation of the bulkheads.
  • Verify that the seawater circulation system is compatible with the installed pump.
  • Consider the compressor start-up surge current relative to the capacity of your inverter or generator.
  • Check the IP protection rating of the electronic components, especially if they are located in areas subject to condensation.

What should I check for the piping installation?

Make sure the seawater supply and discharge diameters comply with the air conditioner's specifications. It is essential to avoid restrictions and to ensure the circulation pump is correctly positioned to prevent dry priming.

Is marine maintenance different from home maintenance?

The marine environment requires frequent cleaning of the seawater filter and periodic inspection of the heat exchanger to prevent salt scale buildup that would reduce the system's thermal efficiency.

How do I calculate the thermal load of a cabin?

The calculation requires adding up the volumes of the spaces to be cooled and factoring in sun exposure and insulation. BTU requirements are estimated based on cubic volume, also accounting for heat generated by large glazed areas.

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