CTM CT-25HN – 25,000 BTU Marine Air Conditioner 230V 50/60HZ NMEA 2000

Cabin comfort on a mid-size cruiser demands more than raw cooling power — it demands a unit engineered to survive constant saltwater exposure without breaking down halfway through the season. The CTM CT-25HN answers that directly: a 25,000 BTU marine air conditioner built around titanium condenser coils and native NMEA 2000 connectivity, so the cooling system reports to your boat’s existing navigation network instead of requiring another standalone control panel.

Why Choose the CTM CT-25HN

Copper coils corrode faster in saltwater than titanium does — that’s the trade-off most boat owners eventually run into with older AC units. The CT-25HN sidesteps that by using titanium from the start, and it’s engineered as a direct drop-in replacement for Dometic, Webasto, Cruisair, Marine Air, and Mermaid Air units, so an existing control system usually doesn’t need to be rewired during a swap.

This unit is best suited to owners who already run an NMEA 2000 network onboard, or plan to. If you just want a standalone 25,000 BTU unit without network integration, CTM’s non-NMEA CT-25H is a simpler, slightly less expensive option.

What to Know Before Installing

• CTM recommends the PCX1500 (1,500 GPH) pump for proper water circulation
• A control display is sold separately — choose the Easy Cool Standard 3.5″ (NMEA 2000) or Easy Cool Mini 2.4″
• Confirm your ductwork meets the minimum sizing before installing, since airflow drops if the ducting is undersized
• Self-installation is possible thanks to the universal control board, though boats with complex NMEA 2000 setups usually benefit from a certified marine technician for the MFD integration step