CTM CT-6HN – 6,000 BTU Marine Air Conditioner 230V 50/60HZ NMEA 2000

Smaller cabins, day berths, and guest staterooms rarely need a full-size AC system, and CTM built the CT-6HN with that in mind — a 6,000 BTU marine air conditioner on 230V power, compact enough for tight installs but still carrying the same titanium coil construction and NMEA 2000 integration found across CTM’s larger units. It’s a natural fit for boats adding zoned cooling to a space that doesn’t justify a bigger unit.

Why Choose the CTM CT-6HN

This unit is a documented replacement for the Dometic DTG6 (part 205162069), DTU6 (205161060), Cruisair STQ6/STX6, and equivalent Marine Air 230V 6K units — a common swap for boats retrofitting a small cabin or head with its own dedicated cooling zone rather than relying on the main system.

Where it’s not the right choice: larger salons or staterooms that need more than 6,000 BTU of cooling capacity, or boats without 230V power available. For those cases, CTM’s 10K/12K models or the 115V CT-6N are better matches.

What to Know Before Installing

• Ducting steps down to 4″ on this unit versus the 5″ typical on Dometic equivalents — a clamp handles the transition
• Water connections are a standard 5/8″, matching most units it replaces
• Return air grille clearance requirements are lower than CTM’s larger models, easing placement in tight spaces
• Confirm fuse sizing stays at 15A before wiring the unit in