One Marine Air Conditioner or Two Smaller Units?
The short answer
Compare the required cooling in each occupied zone and the duct routes available. One unit may cost less, while two units can offer independent operation and some redundancy. Neither total BTU nor boat length alone proves that air can reach both cabins adequately.
One Boat Air Conditioner or Two Smaller Units? — Requirements and Limitations
A single unit needs an appropriately designed supply and return path for every space it serves. Long or restrictive ducting may reduce delivered airflow even when the nominal cooling capacity is sufficient.
Two units introduce more equipment and service points. A shared seawater system needs to be designed for the combined flow, and the electrical supply must support the intended simultaneous operation. Compare the complete installation scope rather than two equipment prices.
Related Sizing, Installation and Service Guides
Each of these answers a different part of the same problem.
- what two cabins changesthe architecture question in full
- why the far cabin does not coolthe fault this decision creates
- what two units costthe second is cheaper than the first
- size it firstthe total decides whether one unit is even possible