CTM CT-16N – 16,000 BTU Marine Air Conditioner 115V NMEA 2000

Not every vessel runs 230V shore power, and that gap is exactly what the CTM CT-16N is designed to close. It delivers the same 16,000 BTU of cooling as its higher-voltage sibling, but built specifically for standard 115V electrical systems common on smaller cruisers and older boats, without giving up the titanium coil construction or NMEA 2000 connectivity found across the rest of CTM’s self-contained lineup.

Is the CT-16N Right for Your Boat?

This unit draws noticeably more current than its 230V sibling — 10.5A cooling versus 5.1A — since 115V systems need higher amperage to deliver the same wattage. That’s not a flaw, just physics, but it does mean checking your boat’s electrical panel and breaker capacity before committing to installation. It’s a documented replacement for the Dometic DTU16, DTG16, ECD16, Cruisair STX16/STQ16, and equivalent Marine Air and Webasto 115V units.

If your boat already runs on 230V shore power or a 230V generator, the CT-16HN pulls less current for the same cooling output and is generally the better electrical fit — the CT-16N exists specifically for boats that don’t have that option.

What to Know Before Installing

• Confirm your panel supports the 25–40A fuse range this unit requires — 115V systems draw more current than 230V equivalents
• The CTM PM500L pump (500 GPH, 115V) is the matched water pump for this model
• Return air grille clearance should meet the 160 sq in minimum for unrestricted airflow
• Soft start compatibility is worth using if your boat runs on a smaller generator, since it meaningfully reduces the startup power spike