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Flagship FM18RLP – 18,000 BTU Marine Air Conditioner 230V Cool Only Low Profile
Flagship FM18RLP specifies 18,000 BTU cool-only capacity with 230V power in a low-profile marine air conditioner.
- 18,000 BTU capacity suits larger interiors.
- 230V input guides system compatibility.
- Cool-only operation excludes heating functions.
- Low-profile design suits shallow installations.
- Dedicated output supports cabin cooling.
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Description
For boats that only need cooling and want to keep the system as simple as possible, the Flagship FM18RLP Cool Only in 230V trim strips out the heating function entirely — same 18,000 BTU capacity, same 11-inch low-profile build for tight installation spaces, just without the added electric heat components.
Key Features of the Flagship FM18RLP Cool Only (230V)
- Simpler system than the Cool & Heat version, with one less function to service over the unit’s lifespan
- No PC board design keeps the electronics straightforward and easier to troubleshoot
- LG rotary compressor delivers quiet operation, quiet enough for under-berth mounting on many boats
- 11-inch height fits catamarans and other low-clearance installations
- Top or side discharge configuration available
Flagship FM18RLP Technical Specifications (230V, Cool Only)
- Cooling Capacity: 18,000 BTU
- Voltage: 230V
- Refrigerant: R410a
- Amps Cooling: 6.4 A
- Blower Airflow: 555 CFM
- Dimensions (L x W x H): 24″ x 17″ x 10.5″
- Net Weight: 113 lbs (52 kg)
- Warranty: 5 years parts / 1 year labor (condenser, chassis, compressor, evaporator)
Why Choose the Flagship FM18RLP Cool Only
Skipping the heat function means fewer components that can eventually need service — a reasonable choice for boats that cruise exclusively in warm climates with no real heating need. If your plans ever take you into cooler weather, the Cool & Heat version of this same low-profile platform covers that instead, at the same footprint and installation requirements.
This 230V configuration draws notably less current than the 115V Cool Only version for the same cooling output, which is worth factoring in if your boat’s 230V circuit capacity is more readily available than 115V.
What to Know Before Installing
- Made-to-order with a typical 5-6 day lead time
- Ships via LTL freight to a commercial address only
- Since this unit has no heat function, confirm it matches your climate needs before ordering
- An optional install kit is available separately
| Brand | Flagship Marine |
| Exact Model Code / SKU | FM18RLP (230V Cool Only) |
| Country of Origin | USA |
| System Architecture | Self-Contained Low-Profile Marine A/C System |
| Cooling Capacity - BTU/h | 18,000 BTU/h |
| Cooling Capacity - kW/Watts | 5.27 kW |
| Heating Capacity - BTU/h | 0 (Cool Only) |
| Reverse Cycle Heating Function | No |
| Electrical Voltage | 230V |
| Alternating Current Frequency | 50/60 Hz |
| Electrical Phase | Single Phase |
| Full Load Amps - FLA Cooling | 6.9 A |
| Locked Rotor Amps - LRA | 32 A |
| Max Circuit Breaker Size | 20 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 | 550 CFM |
| Duct Discharge Connection Diameter | 6 inches (152 mm) |
| Condensate Drain Connection Size | 1/2 inch (12.7 mm) |
| Physical Dimensions - Unit | 12.0 x 21.0 x 15.0 inches (305 x 533 x 381 mm) |
| Net Weight | 71 lbs (32.2 kg) |
| Chassis & Condenser Material | Stainless Steel Frame & Cupronickel Condenser Coil |
| Standard Factory Warranty | 5 Years (Limited) |
| Application & Sizing Guidance | International 230V low-height build optimal for commercial or pleasure hulls operating in hot climates needing dedicated cooling profiles up to 1,000 cu.ft, min generator 4.5 kW. |
What's in the Box
- 1x Flagship FM18RLP 18,000 BTU Low-Profile Self-Contained Marine Air Conditioner Unit (230V - Cool Only)
- 1x Heavy-Duty 100% Cupronickel Seawater Condenser Coil
- 1x High-Velocity Rotatable Low-Profile 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 FM18RLP 230V Cool Only FAQ
How much does Flagship FM18RLP weigh?
Flagship FM18RLP weighs exactly 68 lbs net weight. This cool-only variation removes heavy internal reverse-cycle plumbing, optimizing overall vessel balance on lightweight sportfishers while delivering a full 18,000 BTU of output to quickly eliminate high humidity levels inside cabin companionways over long summer cruising weekends.
What duct size does this unit need?
Flagship FM18RLP requires a 6 inch duct ring size. This factory specification allows the high-velocity low-profile centrifugal blower assembly to push cold air smoothly through tight bulkheads without encountering backpressure limitations, securing optimal airflow distribution throughout expansive salon areas during high-heat operations.
Where should you install Flagship FM18RLP?
Flagship FM18RLP is perfect for shallow cockpit benches and flybridge seating blocks. Certified marine technicians typically slide this 230 Volt single-phase unit into low-clearance storage pockets on sportfishing boats up to forty-eight feet, where its flat layout avoids encroaching on valuable interior headroom.
| System Metric | Factual Value |
|---|---|
| Cooling Capacity | 18,000 BTU |
| Voltage Rating | 230V 50/60Hz |
| Current Draw | 6.2 Amps |
| Chassis Height | 11.5 inches |
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