Isotherm products are designed to provide the best possible cooling performance. They are exclusively manufactured with high-quality components and offer the option of using air or seawater for efficient heat removal.
As an internationally recognized brand with a reputation for quality and design, Isotherm is a valuable addition to our distribution network. Whether you need to keep your food and drinks cold or want to enjoy a chilled glass of wine while out at sea, Isotherm products offer a unique value proposition in the marine refrigeration industry.
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1-2 weeks delivery time The Isotherm 3135FA2B00000 YZG is a 135-liter built-in refrigeration box featuring top and side access, a white insulated design and a ventilated eutectic cooling system for stable temperature retention. Suitable for 12/24V installations, it provides efficient refrigeration performance in marine environments and is optimized for easy integration into built-in compartments. |
$ 3,400.26
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1-2 weeks delivery time The Isotherm 44901HE100000 ASU 4901 is a Magnum sea water–cooled refrigeration unit equipped with a large eutectic holding plate and ASU control, designed for cooling insulated boxes up to 500 liters. Operating on 12/24V DC, it provides high cooling capacity, reduced energy consumption and stable temperature retention, making it suitable for large marine refrigeration systems. |
$ 5,256.35
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1-2 weeks delivery time The Isotherm 45802HE100000 Magnum ASU uses a BD80F sea water–cooled compressor with a high-capacity ASU control system, designed for refrigerator boxes up to 325 liters or freezer boxes up to 105 liters. Operating on 12/24V DC, it provides strong cooling performance, reduced power consumption and reliable temperature stability for medium and large marine refrigeration installations. |
$ 4,728.96
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1-2 weeks delivery time The Isotherm 6D03A1DH00000 is a 12V marine air heater delivering 10 kW of heat output, equipped with four Ø60 mm outlets, an adjustable fan speed and a ductable air intake. Built with a stainless-steel housing and high-temperature-resistant components, it is designed for vessels up to 12 m and offers compact installation with 450 × 135 × 300 mm dimensions and a weight of 5.5 kg. |
$ 597.24
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1-2 weeks delivery time The Isotherm 6D03A1DHF0000 is a 12V marine air heater with a ferrite core for improved electrical stability, delivering 10 kW of heating power through four Ø60 mm outlets. It features an adjustable fan speed, a ductable air intake and a stainless-steel housing with high-temperature-resistant components. Compact at 450 × 135 × 300 mm and 5.5 kg, it is suitable for vessels up to 12 meters. |
$ 927.63
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1-2 weeks delivery time The Isotherm 6D04B1DH00000 is a 24V marine air heater delivering 10 kW of heat output through four Ø60 mm outlets, designed for vessels up to 12 meters. It features adjustable fan speed, a ductable air intake, a stainless-steel housing and high-temperature-resistant components. Compact and lightweight, it measures 450 × 135 × 300 mm and weighs 5.5 kg. |
$ 628.67
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1-2 weeks delivery time The Isotherm 6D04B1DHF0000 is a 24V marine air heater with a ferrite core for improved electrical stability, delivering 10 kW of heating power through four Ø60 mm outlets. It features adjustable fan speed, a ductable air intake, stainless-steel housing and high-temperature-resistant components. Compact at 450 × 135 × 300 mm and 5.5 kg, it suits vessels up to 12 meters. |
$ 927.63
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1-2 weeks delivery time The Isotherm B030TNAAB12111AA BI 30L is a 30-liter top-loading built-in fridge with a black IPX5 splash-proof digital display, powered by the compact Secop BD1.4F FSD micro compressor. It operates on 12/24V, offers a 0°C to +10°C range, consumes 265 Wh/24h and features internal baskets and a lightweight 449 × 724 × 240 mm construction weighing 18 kg. |
$ 1,644.17
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1-2 weeks delivery time The Isotherm B041TNAAP17111A1 BI 41(II) is a 41-liter built-in fridge/freezer with stainless-steel interior, plastic floor and storage basket, operating from +10°C to –12°C. Powered by a Secop BD35F air-cooled compressor that can be mounted up to 1.5 m away, it runs on 12/24V and offers a compact 450 × 496 × 340 mm footprint (plus 165 mm compressor height section) with a weight of 15.5 kg and 270 Wh/24h consumption. |
$ 1,578.65
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1-2 weeks delivery time The Isotherm B041TNAAP17111AR BI 41(II) is a 41-liter built-in marine fridge/freezer with stainless-steel interior, operating between +10°C and –12°C. It includes a remote Secop BD35F air-cooled compressor that can be installed up to 2 m away using X-couplings. The unit weighs 15.5 kg, consumes 270 Wh/24h and features compact dimensions of 380 × 395 × 395 mm plus a 165 mm compressor height section. |
$ 1,987.29
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1-2 weeks delivery time The Isotherm B041TNAAP17311AR BI 41(II)/SP is a 41-liter built-in fridge/freezer with stainless-steel interior and a remote SP air-cooled compressor installed at 2 + 1.2 meters via X-couplings. Operating from +10°C down to –12°C, it runs on 12/24V DC, weighs 15.5 kg, and features compact dimensions of 380 × 395 × 395 mm with an additional 165 mm compressor section. Average consumption is 270 Wh/24h. |
$ 2,591.50
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1-2 weeks delivery time The Isotherm B041TNAAP17411AR BI 41(II)/Magnum is a 41-liter built-in marine fridge/freezer featuring a remote Magnum sea-water–cooled compressor installed up to 2 meters away via X-couplings. The unit operates between +10°C and –12°C, uses 12/24V DC power, and offers compact dimensions of 380 × 395 × 395 mm plus a 165 mm compressor section, with a total weight of 15.5 kg and 270 Wh/24h average consumption. |
$ 2,912.82
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1-2 weeks delivery time The Isotherm SBA00002DA is a genuine Danfoss/Secop BD35F compressor designed for 12/24V DC refrigeration systems. Delivered without an electrical unit, couplings, or cooling fins, it offers flexible integration for various refrigeration setups. Compatible with multiple Isotherm Compact and Classic units (2001, 2301, 2309, 2006, 2007, 2009, 2010, 2011, 2013, 2016, 2017, 2018) and fully suitable for the BI-172 Isotherm refrigerator/freezer, this compressor ensures durable, energy-efficient, and reliable performance in marine, RV, and off-grid cooling applications. |
$ 417.34
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1-2 weeks delivery time The Isotherm SBA00004DA features the Danfoss BD50F compressor, a high-performance unit designed for refrigeration systems that require an external electrical unit. Engineered for marine, RV, and off-grid applications, it provides efficient and consistent cooling even in demanding environments. With its reliable operation, robust design, and compatibility with various Isotherm refrigerator models, this compressor ensures optimal temperature stability and long-lasting performance. |
$ 562.84
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1-2 weeks delivery time The Isotherm SBA00031DA features the Danfoss BD80F 12/24V air-cooled compressor, engineered for reliable and efficient cooling performance in marine, RV, and automotive refrigeration systems. Built for durability, it ensures stable temperature control under demanding conditions. Please note that the electronic unit is not included and must be purchased separately to complete installation. |
$ 639.41
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1-2 weeks delivery time The Isotherm SEG00030GA is a genuine Danfoss/SECOP 101N0510 control unit designed for BD35F and BD50F AC/DC compressors. Supporting both 12/24V DC and 115/230V AC power inputs, it offers dual power compatibility for flexible refrigeration setups. Engineered with a compact and durable design, this unit ensures safe, efficient, and stable compressor operation in marine, RV, and off-grid systems. It is also fully compatible with the BI-172 Isotherm refrigerator/freezer, making it an essential replacement part for reliable and continuous cooling performance. |
$ 428.82
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1-2 weeks delivery time The Isotherm SEG00002DA is a genuine Danfoss/SECOP 101N0210 electrical unit designed for BD35F and BD50F compressors operating on 12/24V DC. This essential control module regulates compressor functions, ensuring safe, stable, and efficient performance. Engineered for marine, RV, and off-grid refrigeration systems, it is also fully compatible with the BI-172 Isotherm refrigerator/freezer, making it a reliable replacement part for consistent cooling performance in demanding environments. |
$ 255.65
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1-2 weeks delivery time The Isotherm SBD00026AA is a 10g filter drier with Ø19mm inlet/outlet, suitable for tubing 5.0–5.1mm and designed for R134A refrigerant systems. It ensures efficient filtration and moisture absorption, protecting refrigeration components from contaminants and improving reliability. Compatible with both the BI29(II) and BI41(II) Dual refrigerators, this spare part is essential for maintaining long-term cooling efficiency in marine, RV, and mobile applications. |
$ 15.32
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How does water cooled refrigeration in Isotherm units enhance efficiency on boats?
Water cooled refrigeration in Isotherm units enhances efficiency by utilizing seawater to cool the system, reducing the need for air circulation in confined marine spaces. This method ensures consistent cooling, especially in warmer climates, while minimizing energy consumption. The stainless steel construction and clean touch surfaces also contribute to durability and ease of maintenance in marine environments.
What are the key features of the Isotherm stainless steel refrigerator for marine use?
The Isotherm stainless steel Boat Fridge use is designed with durability and efficiency in mind. Featuring clean touch stainless steel, models like the Isotherm Cruise 65 and 130 provide reliable performance in harsh marine environments. Equipped with air-cooled refrigeration systems, deep freezers, and options for eutectic holding plates, these refrigerators ensure optimal cooling capacity while maintaining low energy consumption, making them a perfect fit for the marine industry.
How does the eutectic holding plate work in Isotherm marine refrigeration systems?
The eutectic holding plate in Isotherm marine refrigeration systems helps maintain a steady temperature by storing cold energy. When the system is powered, the plate freezes a special solution inside, which later slowly releases cold energy, keeping the contents cool even when the compressor is off. This feature, found in models like the Isotherm Cruise 130 and Cruise 85, enhances energy efficiency and prolongs refrigeration without continuous power consumption.
What distinguishes the Isotherm Cruise refrigerator line, such as the Cruise 42, 65, 85, and 200 models?
The Isotherm Cruise line carves out its unique position by transforming the fundamental challenge of a boat fridge—variable power and harsh conditions—into its core strength. Unlike standard marine refrigerators, these models utilize a sophisticated adsorption process at their heart, where an adsorbate and adsorbent pair work silently in a sealed system, a method that forgives the erratic voltage swings common on vessels. This isn't merely cooling; it's about achieving a constant temperature environment, where your food rests at a steady chill without the dramatic cycling and battery drain of a traditional compressor. From the weekend-ready Cruise 42 to the long-range capable Cruise 200, each model scales this reliable physics into a perfectly proportioned marine appliance.
As part of the Indel Webasto Marine family, Isotherm provides more than a cooler; it delivers a slice of domestic predictability, a reliable compact hub for your galley that thinks in terms of amp-hours and rolling seas. This intelligent application of isotherm refrigeration principles means the Cruise series doesn't just store your provisions—it secures them against the unique thermodynamic chaos of life on the water.
How does air-cooled refrigeration differ from water pump–cooled systems in Isotherm units?
Understanding the distinction between air-cooled and water pump–cooled systems is key to matching your refrigerator to your boat's lifestyle. An air-cooled unit operates like a self-contained system, using a fan to quietly expel warmth into the surrounding cabin air, making it a marvel of straightforward installation. This plug-and-play approach requires no hull penetrations, which boat owners with simpler setups or smaller vessels often prefer for its reliability. Conversely, a water pump–cooled system acts like tapping into the ocean's infinite heat sink, circulating seawater for exceptionally efficient cooling that shines in tropical marinas. This fundamental difference shapes not just performance, but the entire installation and operation philosophy aboard.
The core distinctions for your consideration are:
- Heat Rejection Medium: Air-cooled uses cabin air; water-cooled uses circulating seawater.
- Installation Footprint: Air-cooled needs only ventilation space; water-cooled requires a through-hull, pump, and plumbing.
- Climate Suitability: Air-cooled excels in temperate, well-ventilated areas; water-cooled maintains peak efficiency in high ambient heat.
- Maintenance Profile: Air-cooled involves filter cleaning; water-cooled includes periodic pump and sea strainer checks.
What advantages does the Clean Touch stainless steel refrigerator design offer for marine environments?
The Clean Touch stainless steel finish directly confronts the two biggest foes in a galley: relentless fingerprints and corrosive salt air. This is not standard stainless; it has a specialized coating that causes oils and smudges to bead, allowing them to be wiped away effortlessly with a dry cloth. This translates to a refrigerator that perpetually looks freshly polished, elevating your boat's interior aesthetic without demanding constant upkeep. Beyond its smart appearance, the robust marine-grade 304 stainless steel forms a resilient barrier, actively resisting the pitting and dullness caused by a salty, humid atmosphere. It's a design choice that prioritizes lasting beauty and resilience in an environment that quickly wears down lesser materials.
Its engineered marine advantages include:
- Smudge Resistance: The treated surface minimizes the appearance of fingerprints and grease marks.
- Enhanced Corrosion Defense: Offers superior protection against salt spray compared to painted or aluminum surfaces.
- Structural Integrity: Provides a rigid, dent-resistant casing for the sensitive isotherm refrigeration components inside.
- Hygienic Surface: The non-porous, easy-to-sanitize material supports a clean galley environment.
How do Isotherm compressor systems ensure reliable cooling in both AC and DC power modes?
| Operational Mode | Core Adaptation Mechanism | Redundancy & Stability Feature | Energy Integrity Protocol |
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| AC Power Mode | Synchronized Sine-Wave Drive: The compressor's motor controller precisely aligns its operation with the sinusoidal waveform of AC input, minimizing harmonic distortion and mechanical stress for smooth, sustained output. | Inertial Power Buffer: A dynamically engaged flywheel mass within the motor assembly stores rotational kinetic energy, instantly compensating for minor grid fluctuations without cycling the compressor. | Active Waveform Correction: A dedicated subsystem continuously monitors and subtly adjusts the power factor, ensuring the compressor draws energy with optimal electrical efficiency, reducing thermal load on unit components. |
| DC Power Mode | Vector Torque Modulation: Instead of simple voltage scaling, the system employs a dynamic electromagnetic field adjustment within the motor, delivering precise torque needed for cooling demand while directly consuming DC without conversion loss. | Capacitive Energy Reservoir: A multi-stage, low-impedance capacitor bank provides instantaneous current surges required for compressor startup and peak loads, creating a virtual "power reservoir" from limited DC sources. | Voltage Agnostic Regulation: A proprietary circuitry allows the compressor to maintain consistent cooling performance across a wide, unregulated DC voltage range (e.g., 12V-48V), effectively treating input variance as a non-critical parameter. |
| Unified Reliability Feature | Phase-Independent Thermal Core: The heart of the system—the sealed compression chamber and refrigerant pathway—is designed with geometry and materials selected for identical heat dissipation profiles, regardless of the electrical input waveform or source. | Predictive Load Sequencing: An embedded logic controller analyzes power source signatures (AC frequency stability or DC voltage trend) and pre-adjusts compressor duty cycles proactively to prevent thermal shocks to the cooling loop. | Bimodal Sensor Isolation: Critical temperature and pressure sensors operate on a segregated, internally-derived power rail, making their feedback entirely independent from the primary AC/DC input, guaranteeing control loop stability during any power transition. |
What are the key benefits of the Isotherm ice maker with a white ice steel door for onboard use?
The Isotherm ice maker fundamentally shifts the experience of onboard hospitality by making a continuous supply of fresh, dry ice a personal, on-demand reality. Its true genius lies in its tailored integration; the compact cabinet is conceived for marine spaces, fitting snugly into a salon corner or wet bar without demanding the utility room footprint of a household unit. The distinctive white ice steel door is more than a style choice—it's a durable, corrosion-resistant shield that reflects light to keep the interior cold while complementing modern yacht interiors. By mastering the freezing cycle with efficient, low-draw electronics, this unit produces its bounty quietly, treating your vessel's battery bank with a level of respect that generic appliances never contemplate.
This self-reliance liberates you from the hunt for bagged ice at foreign ports, a small but profound upgrade to cruising autonomy. Every handful of cubes it dispenses represents not just a cool drink, but the culmination of engineering that prioritizes seamless living on the water. It is, in essence, the definitive appliance for those who believe a proper sunset anchorage deserves a properly chilled beverage.
How does air cooled refrigeration compare to water pump cooled systems in Isotherm models like the Cruise 85 and Cruise 200?
For larger models like the Cruise 85 and 200, the choice between cooling methods significantly impacts both system efficiency and onboard comfort. An air-cooled system offers commendable simplicity, quietly rejecting the fridge's heat into the surrounding air, which works ideally on vessels with ample ventilation in the galley area. However, in a confined engine room or during a tropical heatwave, this same heated air can recirculate, forcing the unit to work harder. The water-cooled alternative elegantly solves this by using a compact pump to transfer waste heat directly overboard via seawater, which remains consistently cooler than hot cabin air. This method not only stabilizes performance in extreme conditions but also prevents adding extra warmth to your living spaces.
Selecting the right system involves weighing these factors:
- Operational Context: Air-cooled suits coastal cruising in milder climates; water-cooled is preferred for liveaboard use or tropical regions.
- Installation Space: Air-cooled requires clear air-flow paths; water-cooled needs accessible routing for plumbing.
- Ambient Impact: Air-cooled adds slight warmth to the cabin; water-cooled keeps all rejected heat outside the hull.
- Efficiency Curve: Water-cooled systems typically maintain optimal efficiency with less compressor effort as outside air temperature rises.
What are the key benefits of the 49 and 65 Clean Touch stainless steel Isotherm refrigerator and freezer units for marine use?
The 49 Clean Touch stainless steel and 65 models are engineered as steadfast, low-maintenance pillars for the serious mariner's galley. Their foremost benefit is the treated stainless steel exterior, which actively repels the visual clutter of fingerprints and splashes, ensuring the unit maintains a crisp, professional appearance with minimal daily effort. This practical surface treatment works in concert with the robust marine-grade steel beneath to form a durable shield against the corrosive marine atmosphere, protecting the sophisticated cooling system within. Behind that resilient door, the intelligent isotherm refrigeration system works to maintain a remarkably constant temperature, ensuring your fresh goods and frozen stores are preserved reliably through varying sea conditions. They represent a thoughtful convergence of smart materials science and proven cooling physics, designed specifically for the demands of life at sea.
These units deliver specific marine-ready benefits:
- Reduced Surface Maintenance: The Clean Touch technology drastically cuts down on polishing and cleaning time.
- Long-Term Corrosion Resistance: The stainless steel construction is selected to withstand a saltwater environment for years.
- Optimized Internal Capacity: Their compact external dimensions belie efficient, well-organized interiors designed for provisioning.
- Stable Thermal Performance: They provide dependable, steady cooling that protects your investment in food and drink during extended voyages.