The Dometic FreshJet FJZ7 3500 is the highest-output air conditioner in the entire FreshJet roof-mounted range, delivering 3500W of cooling and 3200W of heating for large caravans and motorhomes over 9 metres in length. This flagship inverter model is built for owners of large integrated motorhomes, A-class vehicles, and long twin-axle caravans where window area and interior volume create the highest cooling demands. Available in white or black, it weighs 38.3 kg and measures 1090 x 285 x 700 mm, the tallest rooftop profile in the FJZ7 lineup. It fits a standard 400 x 400 mm roof opening with roof thicknesses of 25 to 60 mm. Current draw is 7.0A for cooling and 6.6A for heating, with a minimum circuit protection of 8A.
What is the highest-output Dometic roof air conditioner for large motorhomes?
The FJZ7 3500 is the highest-output roof-mounted air conditioner in the Dometic FreshJet range, with 3500W cooling and 3200W heat pump heating. Designed for vehicles over 9 metres, it uses an inverter compressor with Adaptive Power Mode and SmartECO off-grid capability. It weighs 38.3 kg and requires 8A minimum circuit protection.
Every FJZ7-exclusive feature is included. Adaptive Power Mode caps the unit's power consumption through the Dometic smartphone app, letting you match the air conditioner to your campsite's available amperage. Advanced Sleep Mode keeps the inverter compressor running at a constant low speed overnight for quiet, consistent temperature control. SmartECO enables off-grid operation when connected to a Dometic TEMPRA lithium battery (300 Ah or larger recommended) via a compatible inverter, intelligently managing battery resources by reducing output or switching to fan mode as needed. Wi-Fi connectivity and CleanAir bipolar ioniser air purification are both built in as standard.
The compatible air distribution box is the FJZ ADBD (sold separately), with an electronic touch control display, warm white LED ambient lighting, vertically adjustable outlet vents, a reusable dust filter, and 350 m³/h airflow. The FJZ7 3500 uses R32 refrigerant (650g charge, GWP 675) and operates from -2°C to +52°C. The 3200W heat pump heating capacity is the highest in the FreshJet range, making this unit a serious proposition for year-round touring in southern Europe and beyond. Vehicles with large panorama windows and generous glass surfaces generate the greatest heat build-up, and the FJZ7 3500 has the output to manage it. Dometic provides a 5-year warranty on parts.
Dometic FreshJet FJZ7 3500 Features
- 3500W Cooling Capacity - The highest-output roof air conditioner in the entire FreshJet range
- 3200W Heat Pump Heating - The highest heating output in the FreshJet range for year-round touring
- Inverter Compressor - Automatically adjusts speed to match cooling demand for quieter, more efficient operation
- Advanced Sleep Mode - Constant compressor frequency for whisper-quiet overnight running
- Adaptive Power Mode - Set maximum power draw via the Dometic app to suit your campsite hook-up
- SmartECO Function - Off-grid operation with intelligent battery resource management (requires Dometic TEMPRA battery)
- Wi-Fi Connectivity - Control and monitor your climate remotely via the Dometic smartphone app
- CleanAir Technology - Integrated bipolar ioniser reduces bacteria, mould, and odours
- Premium Design - Aerodynamic rooftop unit with LED light curve
- Optimised Airflow - Two-way air distribution (front and back) with 350 m³/h airflow rate
- Adjustable Outlet Vents - Vertically adjustable vents for individual airflow regulation
- Reusable Dust Filter - Easy to remove for cleaning
- Available in White or Black - Black finish applies to rooftop unit only
- 5-Year Warranty on Parts
Clean Air TechnologyEffectively reduces bacteria and odours to keep your RV smelling fresh and clean
Dometic Climate AppConveniently control your roof air conditioner from your smartphone
Sleep ModeReduces fan speed to 80% to minimise operating noise
Exclusive Premium DesignAerodynamically shaped rooftop unit with eye-catching LED curve
Superior Cooling PerformanceThe motorhome, caravan or campervan is cooled down in record time
Whisper-quiet OperationWith its variable compressor speed, the FJX7 operates silently while maintaining the desired temperature
Optimised Air Flow and Adjustable Outlet VentsLow-profile air distribution box with powerful front and back airflow. You can adjust the direction of airflow with your fingertips
Intuitive Touch ControlSimply set the temperature and blower level you want
Integrated Lighting and Reusable Dust FilterWarm white LEDs create a beautiful, soft ambient light and you can remove the dust filter easily for cleaning
- SKU: 9630000051 (White) / 9630000071 (Black)
- Model: FJZ7 3500
- Cooling Capacity: 3500 W
- Heating Capacity: 3200 W
- Compressor Type: Electronic Inverter
- Controls: Electronic (via FJZ ADBD air distribution box, sold separately)
- Current Consumption (Cooling): 7.0 A
- Current Consumption (Heating): 6.6 A
- Input Voltage: 220-240 V AC / 50 Hz
- Required Circuit Protection: 8 A
- Operating Temperature: -2°C to +52°C
- Refrigerant: R32 (650 g charge, GWP 675)
- Dimensions (W x H x D): 1090 x 285 x 700 mm
- Roof Opening: 400 x 400 mm
- Roof Thickness: 25-60 mm
- Weight: 38.3 kg
- Suitable Vehicle Length: Over 9 m
- Wi-Fi: Yes (built-in)
- SmartECO: Yes (requires Dometic TEMPRA lithium battery, 300 Ah recommended)
- Compatible Air Distribution Box: FJZ ADBD (Ref. 9630000066, sold separately)
3 years warranty when fitted at the Dometic Fitting Centre
We have partnered with Dometic to offer you an
extra years warranty. If you buy the fitted option above you will take your vehicle to the Dometic Fitting Centre in Tewsbury. The price paid here includes the
standard fitting and it will be fitted directly by Dometic themselves. As Dometic are fitting the air conditioning unit, they are happy to offer 3 years warranty instead of 2! You will also have the piece of mind that the fitting of the unit will be first-class as it will be fitted by a dedicated team of Dometic Service Engineers.
What happens once I place the fitted order with us?Once you place the order with us, we will send your details to the Dometic Fitting Centre. A Dometic team member will then contact you to organise a convenient time for you to bring in your vehicle. Be advised that Dometic will require a photograph of the roof of your vehicle as well as an interior image of the roof light and the surrounding area so they are able to assess if any additional work will be required to fit the unit. We will request this by email after you place the order with us. Please ignore the shipping information. We will not ship the FJX41500 to you, it will be delivered to the fitting centre in Tewkesbury awaiting your vehicle.
Standard fitting involves the removal of an existing 400 by 400 roof light and replacing with, and wiring in, the roof-top unit and installation of the ADB inside the interior of the vehicle. The cost does not include the moving or any other rooftop items you might have e.g. solar panels. If it is found that additional work is required the Dometic Fitting Centre will advise accordingly.
Address of Dometic Fitting Centre:Dometic Fitting Centre
Kineton
Warwickshire
(Please contact us for full address)
Frequently Asked Questions
The Dometic FreshJet FJZ7 3500 is designed for large caravans and motorhomes over 9 metres in length. It's the recommended choice for integrated (A-class) motorhomes with panorama windows, long twin-axle caravans, and any recreational vehicle where large glass surfaces and a sizeable interior volume create high cooling demands.
The FJZ7 3500 requires a minimum circuit protection of 8A. Many European campsites provide 10A or 16A hook-ups, so it will work on a standard pitch. For sites with lower amperage, the Adaptive Power Mode lets you set a maximum power draw via the Dometic app, reducing the unit's consumption to stay within the available supply.
The FJZ7 3500 measures 1090 x 285 x 700 mm (W x H x D) and weighs 38.3 kg. It is the tallest unit in the FJZ7 range at 285 mm high, compared to 225 mm for the FJZ7 2200 and 2600, and 240 mm for the FJZ7 3000. It still fits a standard 400 x 400 mm roof opening, but check you have sufficient clear roof space for the larger external footprint.
The FJZ7 3500 provides 3200W of heating via energy-efficient heat pump technology, which is strong enough to warm a large motorhome during spring and autumn. Heat pumps work by reversing the cooling cycle rather than burning fuel, so they produce heat without gas consumption. They're most effective in moderate conditions. For deep winter use (below -2°C), a dedicated gas or diesel blown-air heating system remains the better option.
Yes. All FJZ7 models (2200, 2600, 3000, and 3500) and the electronic FJZ4 models (1700 and 2200) use the same Dometic FreshJet FJZ ADBD electronic air distribution box (Ref. No. 9630000066). It measures 579 x 48 x 518 mm, weighs 3.9 kg, and includes an electronic touch control display, warm white LED ambient lighting, CleanAir air purification, and vertically adjustable outlet vents.
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