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Flagship FM12 – 12,000 BTU Marine Air Conditioner 115V Cool Only
With 12,000 BTU cool-only capacity, Flagship FM12 uses 115V power for dedicated air conditioning across marine interior spaces.
- 12,000 BTU capacity handles cabin cooling.
- 115V input suits compatible vessel systems.
- Cool-only operation excludes heating functions.
- FM12 identifies the listed configuration.
- Dedicated output serves onboard interiors.
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Description
Warm-weather cruising does not always require onboard heating, making a cool-only system practical for many vessels. The Flagship FM12 provides 12,000 BTU/h, or 3.51 kW, of cooling from a 115V single-phase electrical supply. This self-contained marine air conditioner is designed for commercial-grade cruiser applications and staterooms up to 500 cubic feet according to the supplied guidance.
Key Features
- Provides 12,000 BTU/h cooling for marine staterooms.
- Operates on 115V power for compatible boats.
- Removes heating complexity with dedicated cool-only operation.
- Delivers 400 CFM airflow through a six-inch duct.
- Uses seawater cooling with a specified 4.16 GPM flow.
- Combines stainless steel and cupronickel marine components.
Technical Specifications
- Model FM12, cool-only configuration
- Cooling capacity 12,000 BTU/h or 3.51 kW
- Zero heating capacity without reverse-cycle function
- 115V, 60 Hz, single-phase electrical supply
- Cooling current 9.8 A with 44 A LRA
- Maximum circuit breaker size 25 A
- R-410A refrigerant with hermetic rotary compressor
- Seawater flow 4.16 GPM through five-eighth-inch connections
- 400 CFM airflow with six-inch duct connection
- Dimensions 13.0 x 14.5 x 12.0 inches; weight 58 lbs
Application and Installation Notes
The FM12 is described for harsh marine environments and is intended for staterooms up to 500 cubic feet. Before installation, verify the 115V single-phase supply, 25 A maximum circuit breaker, and minimum generator capacity of 3.5 kW. The installation space must accommodate the 13.0 x 14.5 x 12.0-inch unit, six-inch duct route, half-inch condensate drain, five-eighth-inch seawater lines, electrical connections, and service clearance. The seawater circuit should support 4.16 GPM.
Who This Unit Is Not Ideal For
The FM12 is not suitable for owners who need cabin heating or boats designed around 230V power. A 12,000 BTU/h system may also be unsuitable for areas substantially larger than the stated 500-cubic-foot guidance or cabins with unusually high heat gain. Final sizing should reflect actual vessel conditions.
Warranty and Product Summary
The Flagship FM12 includes a five-year limited factory warranty. Its cool-only 115V configuration, 12,000 BTU/h capacity, 400 CFM airflow, and marine stainless steel and cupronickel construction suit compatible cooling-focused installations.
| Brand | Flagship Marine |
| Exact Model Code / SKU | FM12 (Cool Only) |
| Country of Origin | USA |
| System Architecture | Self-Contained Marine A/C System |
| Cooling Capacity - BTU/h | 12,000 BTU/h |
| Cooling Capacity - kW/Watts | 3.51 kW |
| Heating Capacity - BTU/h | 0 (Cool Only Model - No Reverse Cycle) |
| Reverse Cycle Heating Function | No |
| Electrical Voltage | 115V |
| Alternating Current Frequency | 60 Hz |
| Electrical Phase | Single Phase |
| Full Load Amps - FLA Cooling | 9.8 A |
| Locked Rotor Amps - LRA | 44 A |
| Max Circuit Breaker Size | 25 A |
| Refrigerant Type | R-410A |
| Compressor Type | Hermetic Rotary |
| Seawater Water Flow Rate | 4.16 GPM (250 GPH) |
| Seawater Inlet Pipe Size | 5/8 inch (16 mm) |
| Seawater Outlet Pipe Size | 5/8 inch (16 mm) |
| Evaporator Airflow Capacity | 400 CFM |
| Duct Discharge Connection Diameter | 6 inches (152 mm) |
| Condensate Drain Connection Size | 1/2 inch (12.7 mm) |
| Physical Dimensions - Unit | 13.0 x 14.5 x 12.0 inches (330 x 368 x 305 mm) |
| Net Weight | 58 lbs (26.3 kg) |
| Chassis & Condenser Material | Stainless Steel Frame & Cupronickel Condenser Coil |
| Standard Factory Warranty | 5 Years (Limited) |
| Application & Sizing Guidance | Commercial-grade heavy-duty cruiser air conditioner designed for harsh marine environments, optimal for staterooms up to 500 cu.ft with a minimum generator capacity of 3.5 kW. |
What's in the Box
- 1x Flagship FM12 12,000 BTU Self-Contained Marine Air Conditioner Unit (115V - Cool Only)
- 1x Heavy-Duty 100% Cupronickel Seawater Condenser Coil
- 1x High-Velocity Rotatable Centrifugal Blower Assembly
- 1x Deep-Draw Marine-Grade Stainless Steel Drain Pan
- 1x Solid-State Digital Control Circuit Board
- 1x Washable Aluminum Mesh Return Air Filter
- 1x User Manual and Installation Guide
Flagship FM12 115V Cool Only FAQ
What are the electrical requirements for FM12?
Flagship FM12 operates on a standard 115V power connection. This dedicated single-phase domestic configuration draws only 9.2 amps during active cooling procedures, allowing vessel owners to run comfort equipment effortlessly via standard marine auxiliary generators or common shore power drops at local marinas without trip issues.
What airflow volume does this system deliver?
Flagship FM12 generates an airflow volume of 380 CFM. The integrated rotatable high-velocity centrifugal blower fan operates dynamically to flush hot humidity profiles from cramped living spaces while keeping system resonance decibels extremely low against lightweight composite structural hull partitions and marine plywood cabin walls.
Which vessels fit the Flagship FM12?
Flagship FM12 is designed for mid-sized cabins and crew quarters. It provides optimal cooling coverage for sailboats and motor yachts ranging from twenty-eight to thirty-six feet, delivering efficient climate regulation underneath bunk spaces or within designated cockpit lockers without taking up crucial living space.
| System Attribute | Factory Value |
|---|---|
| Thermal Output | 12,000 BTU |
| Net Weight | 55 lbs |
| Unit Width | 14.0 inches |
| Unit Height | 12.5 inches |
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