Mermaid M9 – Cool Only Marine A/C Unit 9,000 BTU’s 220V

The 220V version of the Mermaid M9 Cool Only brings the same straightforward, heating-free 9,000 BTU cooling to boats wired for 220V circuits rather than 230V or 110V. It’s built to cool about 800 cubic feet of cabin space on cruisers up to 30 feet or sailboats up to 32 feet, using the same compact stainless steel platform shared across Mermaid’s M6 and M9 lineup.

Why Choose the Mermaid M9 Cool Only (220V)

This configuration exists specifically for boats wired to 220V rather than the more common US 230V or 110V standards — often the case on vessels built for or imported from markets outside the US. Functionally, it’s identical to the 230V Cool Only version at 7.0A running amperage; the only real difference is the voltage input itself.

Owners planning to use the boat somewhere heating might be needed should look at the reverse cycle or electric heat M9 configurations instead, since this cool-only model has no path to add heating later without replacing the unit.

What to Know Before Installing

• Confirm your vessel’s electrical system is genuinely 220V, not 230V, before ordering — the two are close but not always interchangeable depending on regional wiring standards
• Pump is not included and must be sourced separately
• Ducting requires both 6″ and 4″ runs, with at least three 4″ round supply grilles
• Air discharge position must be specified before ordering