Dometic FreshJet 5 Mechanical Heat Pump | 15K BTU | Black | FJX5557MHP

Upgrade to heat-pump-capable rooftop AC with the Dometic FreshJet 5 Low-Profile Heat Pump RV Air Conditioner — Black Mechanical (Part #FJX5557MHPBKCS / SKU 9620015928). Mechanical 15,000 BTU low-profile AC with integrated heat pump for electric heating. Direct Penguin II replacement — same 10.5" installed height, quieter operation, reinforced steel base, and built-in hard start. Mechanical control operation via ceiling ADB OR wall thermostat.

⭐ Mechanical Heat Pump — Rare Configuration

Standout differentiator: this is the MECHANICAL heat pump variant of the FreshJet 5 platform. Combines two features that don't typically appear together:

• Heat pump capability — integrated electric heating (typically only on electronic models)
• Mechanical control — can operate via ceiling air distribution box OR wall thermostat, no pre-installed electronic control board required

Meaningful for buyers who want heat pump function without the electronic control complexity of the FJX5557EHP variants — or for installations that already have compatible mechanical control components.

Companion Ceiling ADB

For non-ducted installations using a ceiling ADB for control, see the Dometic Air Distribution Box for Non-Ducted Heat Pump ACs (3314853.000) — manual-control ADB engineered for heat pump systems, compatible with this FreshJet 5 Mechanical Heat Pump unit.

Alternative Configurations

The FreshJet 5 platform is available in multiple configurations. Choose based on your needs:

Prefer White Mechanical Heat Pump?

• 📋 White mechanical heat pump variant may be available — check the catalog

Cooling-Only (No Heat Pump):

• FreshJet 5 15K BTU Mechanical Cooling-Only — Black (FJX5557MBKCS)
• FreshJet 5 15K BTU Mechanical Cooling-Only — White (FJX5557MWHCS)

Electronic Heat Pump (Pre-Installed Control Board):

• FreshJet 5 Electronic Heat Pump — Black (FJX5557EHPBKCS)
• FreshJet 5 Electronic Heat Pump — White (FJX5557EHPWHCS)

⭐ Direct Penguin II Replacement — Same Height and Footprint

The FreshJet 5 is engineered as a drop-in replacement for the Dometic Penguin II:

• Same 10.5" low-profile installed height as Penguin II
• Same mounting footprint
• No roof modifications required

Mechanical Control — Ceiling ADB OR Wall Thermostat

This unit operates through mechanical control components — no pre-installed electronic control board. Two control options work with this AC:

• Ceiling Air Distribution Box (ADB) with integrated controls — twist-knob operation from the ceiling assembly
• Wall thermostat — remote-mounted control

If your existing installation uses either configuration, this AC is a compatible replacement.

Integrated Heat Pump for Electric Heating

• Reversible refrigerant cycle for efficient electric heat
• Cooling AND heating from one rooftop unit
• Reduced propane/furnace dependency in mild weather

⭐ Built-In Hard Start

Standout reliability feature: built-in hard start improves startup performance and reduces the chance of tripping breakers when multiple appliances start simultaneously. Meaningful for RVs on 30-amp service or generator power.

15,000 BTU Cooling

• 15,000 BTU cooling capacity
• Reinforced steel base for long-term durability
• Improved airflow performance vs Penguin II

⭐ Up to 9dB Quieter

Upgraded motor and blower system: up to 9dB quieter operation. Meaningful improvement over legacy Penguin II noise levels.

Low-Profile 10.5" Height

Low-profile design gives improved roof clearance for low-clearance parking, garage storage, or driveway constraints.

Ducted OR Non-Ducted Installation

Versatile installation flexibility — works with both ducted and non-ducted systems.

⭐ Pre-Installed Roof Compression Gasket

Comes with a pre-installed roof compression gasket on the base of the unit. This gasket provides the proper seal between the AC and RV roof — no additional sealant or roof gasket required.

⭐ SHIPS FREE via Freight to the 48 States

Free freight shipping to the 48 contiguous states. Most orders arrive within a week.

⚠️ Freight Shipping Note

This is a large-format freight item. Because of the shipping method, this item may not be eligible for standard return processing — inspect thoroughly upon delivery and note any damage on the delivery receipt before signing.

Cross-Reference Part Numbers

• Manufacturer Part: FJX5557MHPBKCS
• SKU: 9620015928
• UPC: 7315091543224

Black Finish

⚠️ Professional Installation Required

Installation involves rooftop mounting, weather sealing, 120V AC electrical wiring, and integration with your ceiling ADB or wall thermostat. Installation should be performed by a qualified RV service technician.

2-Year Manufacturer Warranty

Genuine Dometic OEM

Key Features

• Genuine Dometic OEM FreshJet 5 mechanical heat pump rooftop AC
• Part number: FJX5557MHPBKCS (SKU 9620015928)
• UPC: 7315091543224
• Direct low-profile replacement for Dometic Penguin II — same 10.5" height and mounting footprint
• 15,000 BTU cooling
• Integrated heat pump for efficient electric heating
• Mechanical control — works with ceiling ADB or wall thermostat
• Built-in hard start
• Up to 9dB quieter than previous FreshJet models
• Reinforced steel base
• Ducted OR non-ducted installation
• Pre-installed roof compression gasket — no additional sealant needed
• Black finish
• SHIPS FREE via freight to 48 states
• Backed by 2-year manufacturer warranty

Specifications

• Brand: Dometic
• Series: FreshJet 5
• Part Number: FJX5557MHPBKCS
• SKU: 9620015928
• UPC: 7315091543224
• Type: RV Rooftop Air Conditioner with Heat Pump (Low-Profile, Mechanical)
• Cooling Capacity: 15,000 BTU
• Heat Pump: Yes (integrated electric heating)
• Control Type: Mechanical (uses ceiling ADB or wall thermostat)
• Hard Start: Built-in
• Configuration: Ducted OR Non-Ducted
• Installed Height: 10.5" (matches Penguin II)
• Mounting Footprint: Matches Penguin II
• Direct Replaces: Dometic Penguin II
• Noise Reduction: Up to 9dB quieter
• Base Construction: Reinforced steel
• Roof Compression Gasket: Pre-installed
• Color: Black
• Cooling-Only Mechanical Sibling: FJX5557MBKCS (15K black)
• Electronic Heat Pump Sibling: FJX5557EHPBKCS (15K black)
• Shipping: Ships FREE via freight to 48 states
• Warranty: 2-year manufacturer warranty