CTM CX-12H – 12,000 BTU Condenser – Marine Split A/C Unit – 230V – 50/60HZ – R410A

For boats standardized on 230V power that need 12,000 BTU of cooling and heating, the CTM CX-12H condenser delivers a direct drop-in replacement for the Dometic DEU12, DEG12, and 220V DEU12 condensing units. A verified owner and refrigeration mechanic reviewed the installation as “clean looking,” noting it connected to existing control wiring without needing to run new wires.

That kind of clean electrical integration matters most for retrofit installs — being able to reuse existing control wiring instead of pulling new runs through bulkheads and overheads saves real labor hours and avoids opening up finished spaces unnecessarily. It’s one of the practical advantages of choosing a condenser built specifically to match OEM control architecture rather than a generic replacement.

Why Choose the CTM CX-12H

A verified review from an owner who also works as a refrigeration and air conditioning mechanic speaks directly to the quality of this installation experience, and the unit carries CTM’s standard 2-year warranty against material and workmanship defects. If you’re replacing a Dometic DEU12 or DEG12, dimensions and control wiring compatibility make for a straightforward swap.

What to Know Before Installing

• EPA certification must be provided before shipping
• Requires a separately purchased evaporator — this listing is the condenser only
• If replacing a Cruisair RX unit, the evaporator will also need replacing since RX systems use R22/R417A refrigerant, not R410A
• Waterline connections use a standard 5/8″ fitting