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Kingfisher MA37X12B Marine Air Conditioner

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Introducing the NEXT MODEL Kingfisher MA37X12B* marine air conditioner with simple DIY installation. Designed by boaters for boaters! This unit will cool up to 350 cubic feet of air volume -- a nice size cabin on a 40-42 foot boat.

Designed, engineered and assembled in the USA! Proud to Make it in Maryland

Why this system?

  • State-of-the-art electronics. A digital electronic expansion valve synchronized to a variable speed BLDC compressor constantly calibrates from 6 different data collection points
  • 12V Direct Current. Yes, you can wire it yourself directly to a battery shunt. No VAC wiring, no inverters, no starter loads, and NO GENERATORS!
  • Superior cooling. This unit can deliver up to 5000 BTU/hr.
  • Control Box mounting flexibility. It can remain mounted to the side of the unit or use the 4 foot wiring harness to mount it separately. The wiring between the Control Box and the unit can be disconnected and reconnected.
  • 1.75 GPM water flow. Small enough to T-it from an existing seacock. **Don’t forget, you still have to install a seawater pump - but with these units, all you need is a DC water pump (Not included)**
  • Incredible air flow. 275CFM on High, 245 CFM on Medium, 185 CFM on Low
  • Whisper quiet. We designed this system with the idea that the user may be sleeping on a berth over it!
  • Digital user interface screen. This simple bulkhead mount (just like your home thermostat) monitors the room temperature and humidity and includes easy-to-understand error icons
  • Sleep timer. Set it to cool for up to 8 hours and go to sleep. The unit will shut itself off at the designated time. No risk of draining your batteries!
  • Rated Current of the compressor is only 12.1A/hour. The variable speed BLDC compressor speeds up and down depending on the loads and conditions.
  • ABS plastic drain pan. No more rusty drain pans! Our drain pan is angled so that the water drains quickly and doesn't pool. Other components made out of aluminum.
  • Adjustable blower exit. Vertical or horizontal placements allows for easier install
  • R134a refrigerant is same as in your car.  Units are shipped pre-charged so there is no need for a service call during installation
  • Air duct diameter. Standard 4”
  • Seawater and condensate drain connections. Standard 3/4”
  • High Side and Low Side service ports. Industry standard 1/4" should it ever need refrigerant servicing


  • Unit dimensions (Control Box attached): 20.5"L x 13.4"W x 12.8"H
  • Unit dimensions (Without Control Box): 20.5"L x 9.9"W x 12.8" H
  • Control Box Dimensions: 11.8"L x 3.4"W x 9.6" H
  • Unit Net Weight: 36 lbs.




    Current shipping time is approximately 5-7 business days.

    We do NOT ship internationally, however we can ship to a freight forwarder of your choice within the lower 48, and you can coordinate delivery from there.

    Due to shipping restrictions, all orders will be delivered via UPS Ground.