Dometic FreshJet FJZ Plus Inverter Roof Top Air Conditioner 4KW

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Dometic FreshJet FJZ Plus Inverter Roof Top Air Conditioner 4KW
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Dometic FreshJet FJZ Plus Roof Top Air Conditioner 4KW

 

Experience the future of RV climate control with the FJZ Series Rooftop Air Conditioner, engineered for top-tier performance that’s smarter, quieter, easier, and greener. If your caravan feels like an oven when summer hits, this powerful rooftop system is the upgrade you’ve been waiting for.

Boasting an industry-leading 4000W cooling capacity, The Dometic FreshJet FJZ Plus Roof Top Air Conditioner 4KW is the first 4.0kW rooftop RV air conditioner, designed to cool your caravan or motorhome faster while using less energy. Whether you’re travelling off-grid or plugged in at the park, you’ll enjoy powerful performance with improved efficiency. The sleek and aerodynamic rooftop unit not only looks premium but also enhances airflow and reduces wind resistance. Inside, advanced brushless motors and a unique vibration-reducing compressor mount deliver whisper-quiet operation, making it ideal for light sleepers. A dedicated Sleep Mode ensures peaceful nights wherever you pull up.

Comfort doesn’t stop at cooling. With integrated 3000W heating, you can enjoy quick warmth at the touch of a button, making this system perfect for year-round adventures. Advanced air purification helps keep the air inside your camper fresh and clean, while sustainable materials and a green refrigerant reduce environmental impact. Quiet, powerful, and intelligently designed, this is rooftop air conditioning redefined.

The Dometic FreshJet FJZ Plus Roof Top Air Conditioner 4KW is the ultimate upgrade for the Dometic Series 7 Plus and the Harrier Plus Caravan Air Conditioners.

Features:

  • First 4.0kW Rooftop RV Air Conditioner: Industry leading cooling capacity Cools your Caravan or RV quickly with reduced energy consumption
  • Premium design: Sleek, aerodynamic European designed rooftop unit
  • Whisper-quiet: Brushless motors for reduced noise and unique compressor mount for reduced vibrations allows for uninterrupted sleep. Dedicated sleep mode to ensure quiet operation.
  • Integrated heating: Quick heat at the touch of a button (3000 watts)
  • Improved sustainability: Green refrigerant and use of recycled plastic reduce the impact on the environment
  • Advanced Power efficiency: Quiet and gentle air conditioner start-up helps manage current draw and smooth operation with a max cooling current of 6.89A meaning longer running times off grid.

App Limitation: The Dometic Climate App allows user to manage and set the maximum current draws on their airconditioners which can enable more control of the state of charge in their power systems.

Included:

  • Dometic FreshJet Electronic Air Distribution Box (ADB), SKU
  • Dometic FreshJet FJZ Plus Roof Top Air Conditioner 4KW, SKU

 

 

 

Dometic Harrier Plus Reviews - NOW REPLACED BY THE DOMETIC FRESHJET PLUS:

 

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Specifications

SKU 9630000082-ADB

Brand Dometic

GTIN 7333497002060

Product Category RV Air Conditioners

Operating Temperature Range -2°C to 52°C

Best for Vehicle Length Up to 9m

Dimensions (W x D x H) 700 x 1090 x 283mm (Air Conditioner) | 518mm x 579mm x 48mm (ADB)

Installed Weight with ADB 43kg

Current Consumption Cooling Max (A) 6.89

Cooling Capacity (W) 4000

Current Consumption Heating Max (A) 6.43

Heating Capacity (W) 3411

Refrigerant Type R32

Refrigeration Technology Compressor

Heating/Cooling Type Heating and Cooling (Reverse Cycle)


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Q & A

  • Will this replace my existing Air Con?

    The Dometic Freshjet range utilises either a 360x360mm or 400x400mm cut out size, which will cover most existing Air Conditioners.

  • Would I need to use an air purifier in the van when this is installed?

    No, the Dometic Freshjet range is the first of its kind to offer a inbuilt air purifier. This is called the ClearAir system, which will keep the van smelling fresh and clean while greatly reducing allergens, viruses, bacteria and pollutants.

  • Does the Freshjet have a WIFI or Bluetooth feature?

    The Freshjet range offers WIFI and Bluetooth, meaning you will be able to operate your AC from your phone.

  • I have a van with a thicker roof, will I need anything else for install?

    The Freshjet range comes with ducting to suit up to 60mm roof thickness. If you roof exceeds this, you will require additional ducts which you can find in the accessories list.

  • I have a 2.4Kva generator and want to install a new Air Con. Will my generator that has continous output of 2100watts run the Freshjet FJZ?

    The new range of Freshjet Series 7 Air Conditioners come backed with inverter technology, which means there isn't a huge in rush of current at start up. Meaning the entire range of Freshjet Series 7 will run off generators above 2 kva. Don't forget to be mindful if anything else is running off the generator at the same time

  • Does this AC come pre-gassed?

    The Freshjet range will come pre-gassed ready for install. This latest range of Dometic AC's are using a more sustainable R32 refrigerant. 

  • Why can't I activate the sleep function?

    The sleep function is only available when using the cooling or heating modes. Ensure you are in either one of these modes, then set your required temperature, press the moon button and the sleep function should be activated (the moon symbol will appear on the air distribution box display when it is activated).

  • I intend to run my Caravan Air Conditioner from a Generator as we will be staying in unpowered locations and my battery bank is not big enough to run the AC for very long. What size Generator do you recommend running my Caravan AC?

    The answer is quite simple, and it just depends on the Caravan Aircon model you have. If you have one of the newer Caravan Aircon models that include inverter technology within the compressor (such as the Dometic FreshJet 7 or Dometic Freshjet FJZ Aircon models), then a 2000w inverter generator will be fine.

    If you have an Aircon model that does not include inverter technology within the compressor (of which there are many new and old Aircon models on the market that do not have inverter tech), then we would recommend a minimum 2200-2400w inverter generator. This is because the Aircon models without inverter technology in the compressor require a bit more power on start up.

    Please note that the above sizing advice does not take into consideration any other appliances running and drawing power from the generator at the same time as the Aircon is running.

    As a general rule, depending on the above criteria of Aircon compressor type, most of our Caravan customers will opt for a generator of around 2000 to 3500 watts in size. There are other larger inverter generator models available from 4000 to 6500 watts in size, but these are less commonly used by caravan/RV owners.

    Popular Caravan Generator models include:

  • Can I run my Caravan Air Conditioner from my Caravan Battery Bank?

    The short answer is yes, it is possible. However, there are a few extra important things to consider.

    The main thing is how long you will be able to run your Aircon for. Let us take one of the more popular and energy efficient Caravan Aircon models on the market: the Dometic Freshjet FJZ: The peak power draw is around 1400w to 1500w. So, you could use a quality 2000w+ inverter (note that Caravan Aircons are 240V) with say a 200ah lithium battery and you will get around 1-2 hours Aircon run time, before you must recharge the batteries again. Depending on how you recharge your batteries (DC to DC charger, solar, mains power etc.), this charging will take time.

    So once again; you can do it with certain batteries & inverters if you are aware of how that will affect your battery storage and charge loss... and knowing how to manage that system.

    You can get a larger lithium battery system to run your Aircon for longer, but obviously this will cost more, so that needs to be considered. It is certainly a big recent trend that our RV customers are installing quality lithium battery systems to run their Caravans/Motorhomes etc. However, running an Aircon unit can be one of the larger power drawing appliances in your van, so it pays to consider your power system's capabilities and how long you want to run the Aircon.

    If you are just pulling up for short stops (1-2hrs) and you are doing a lot of driving, you can run your Caravan Aircon from your lithium batteries for this short time. Many RV owners do this, and as new Caravan Aircon models become increasingly energy efficient and lithium battery advancements evolve to be cheaper, more powerful, and even lighter, then we will certainly see this trend increase. However, currently the popular and often cost-effective choice to run your Aircon if you do not have access to mains power (i.e., free camping) is to use a small inverter generator. You can get a quality 2000-2400w sized inverter generator from around $1,000-$1,500 and these will run many RV Aircon units for 7+ hours before having to refuel.

    So once again, you can use a battery system, but it is not always the most practical option. For more advice on Power Systems to run your Caravan/RV, feel free to give us a call on: 1800 787 278.

  • I'm looking at buying one of your Caravan Air Conditioner models for my 20ft Caravan. What do I need to know about installation and set once I get the AC unit delivered?

    Hi there, fitting and Install instructions come with each Aircon unit, but it is advised a qualified installer (electrical contractor) undertakes the installation.

  • What are the noise levels of your Caravan Air Conditioner units? I'm looking for a quiet model.

    This is a commonly asked question by Caravan/RV owners; however, it is unfortunate that Caravan Aircon manufacturers do not provide dBA ratings in their product model specifications. 

    We can say that we only sell high quality Air Conditioners from premium brands in the RV industry. The only time we have encountered an issue with noise is when the install was not undertaken correctly which can cause a rattle. However, if you ensure the install is done properly, there will be no issues with any of our RV Aircon units being too noisy. 

    One other piece of feedback we can provide, is that the two latest Dometic Aircon models (Harrier and Ibis4) have inverter technology within the compressor, meaning any vibration is minimised. Our customers and our internal testing suggest that when these models are operating at high cooling mode, the noise level is very, very low, making them arguably the quietest Aircon models in the market.

  • What advancements have Dometic made with the new FJZ Plus unit?

    The new FJZ Plus has a larger cooling capacity again from the 7 Series, an in built air purifier, and improved efficiency meaning longer run time on batteries and generators. The new model has managed to remain the same weight as the previous 7 Series Plus and Harrier Plus units.

  • Do the new range of FJZ air cons have the same Air Distribution Box (AD

    Yes, the FJZ units are currently supplied with the FJZ ADB. Alternative models for the ADB are pending availability from Dometic .

  • Will this air-conditioner work off a 2000w generator?

    Hi there - yes, this new air-conditioner model uses an inverter compressor which significantly reduces startup power demands. Therefore, one of its most appealing features is that it will comfortably start and run on a 2000-watt inverter generator.

    Most other air-conditioner models will require more than 2000 watts to start up.

  • How often do I need to service my Dometic RV/Caravan appliances?

    Dometic recommend servicing their gas appliances on a yearly basis, even if the vehicle has not been used. Additionally, bear in mind that insects can built nests in the gas appliances which will cause the appliances to stop working. It can also cause potentially dangerous scenarios.

    For other appliances, such as refrigerators and air conditioners, to ensure the appliances to work efficiently and last longer it is recommended to clean the condenser.

  • With air conditioner ratings, why are some specifications for the same model different between suppliers and information sources relating to things like cooling capacity?

    Hi, good question. With ratings such as cooling capacity, two different numbers can both be correct – they can just relate to different requirements and conditions.

    Often cooling capacity figures displayed for the product are from the electrical rating conditions. The other main method of testing ratings of air conditioners is to ISO5151 standard – this method is under standardised controlled conditions and allows more direct comparison between models.

  • What is the difference between "reverse cycle" caravan air conditioners and "heating element" caravan air conditioners?

    Hi, great question. These descriptions relate to how the heating/cooling works in air conditioners. ‘Heat Exchange’ units use heat exchange to cool and an electrical heat element to warm. It’s not the most efficient heating method, but it works no matter how cold it is outside.
    Reverse cycle units are the more common type and they use a compressor whether heating or cooling. This is more efficient method but for some models can be an issue when there’s ice in the outside air.

    There are more Reverse Cycle models available and it is the most popular type of RV air conditioner – customers that opt for Heating Element style air conditioners typically plan to spend long periods in cold temperatures.

  • Looking at a roof top caravan air conditioner - What are the noise ratings (dBA)? And which is the quietest?

    Unfortunately caravan air conditioner manufacturers don’t provide dBA ratings with their unit specifications, which is a pity because it is a hot topic among caravan enthusiasts.  

    All of the models we stock are premium brands and we have had no feedback from customers that the noise of their caravan air conditioner model purchased from us is too loud, or keeping them awake/disturbing them during the air con operation.

    Referring to specific models, a couple of the more popular caravan air conditioner options are:

    • The FreshJet 7 has a variable speed inverter compressor, making its operation very quiet for its size (its designed for vehicles up 7.5 metres in length). 
    • The Dometic Aircommand Ibis MK3 model (designed for vehicles up to 6.5 metres in length) has improved its high speed fan operation from previous models, also making it a very quiet roof top caravan air conditioner.
    • The latest release from Dometic; The Dometic Aircommand MK4 model (designed for vehicles up to 7 metres in length) features a new-generation compressor with inverter technology which ensures that vibration is minimised, creating a more pleasant environment. In addition to this, the quiet environment that the Ibis 3 achieved has been replicated. Both of these features make it one of the quiestest air conditioners in the market.
  • Hi, I have noticed that you say that this air con will run comfortably off a 2000w inverter - what is the lowest sized inverter that could be used?

    Hi - yes, the Dometic Freshjet FJZ will start and run on any 2000w inverter generator. The manufacturer (Dometic) recommend a 2000w generator, nothing smaller. Many thanks

  • Hi, does the Freshjet FJZ A/C unit have air distribution boards on all four sides? Thanks

    Hi Don, no the Freshjet FJZ has oscillating outlet vents on the front and back only.  The sides have vents for air intake. Many thanks.

  • Does this air conditioner have a very low speed fan for comfortable use when sleeping once desired temp is achieved?

    Hi Don, the unit has an 'innovative sleep mode function' which reduces the compressor speed, in addition to the usual fan speeds, to further reduce the noise and vibration levels while sleeping. Thank you

  • Hi there, can you recommend anyone who would install this in a horse float for me? - Ipswich, QLD area. Many thanks, Jenean

    Hi Jenean, any local electrician or electrical contractor can undertake the install.

    Fitting and installing a rooftop Air Conditioner in a Recreational Vehicle is a very simple task for a qualified electrical contractor. 

    If you are still needing help finding someone, you can always contact the manufacturer (Dometic) directly on:  1800 21 21 21  and ask for an associated RV Air-conditioning specialist in your region. Many thanks 

  • Is it possible to connect a drain to air con to control were water runs on caravan roof .Regards Kevin.

    Hi Kevin,

    Unfortunately the FJZ only has the standard drainage channels. There is no way to reroute this sorry.

  • Hi there, our bus (Toyota Coaster) is 7m and currently has no air conditioning at all which is hell.. We are looking at buying the Dometic FreshJet 7 Series Plus Roof Top Air Conditioner...this might be a stupid question but can the air con be on and running while we are driving?

    Hi Michelle,

    No, these air conditions are designed to be used only while stationary. Opearting the units while in transit could cause faults and would not be covered under warranty..

  • My Dometic branded air conditioner shows p7 on the panel which I presume is an error code but the books do not reference it. Can you help pleasePeter

    Hi Peter,

    We would recommend contacting Dometic on 1800 21 21 21 for assistance.

  • What is the largest size Caravan this will cool?

    Hi There,

    The FJZ Plus is recommended for vehicle lengths up to 9m / 29.5ft

    Regards,

  • Does the unit come pre gassed ready to go or does it need to be charged?

    Hi There,

    The Dometic Freshjet 7 is pre gassed from factory and is ready to install.

  • What is the ambient temperature range for the Harrier V2? at present in the West Kimberley region of WA and current AC shuts down around lunch time with temp at around 44 degrees.

    Hi There,

    The Operating Temperature Range for the Dometic Harrier is: -2 to 52°C

  • Can you advise of the current how many amps does it draw when operated in the 'sleep mode function"

    Hi There,

    Unfortunately Dometic do not advise current ratings for all modes on this air conditioner sorry.

  • Gday,I would like to install an air conditioner to our small house boat, the area is only3.5x 4 m, would this unit be ok for that area, if so do I need a H frame as it is a near flex aluminium planked roof, and I've got a Honda 2kva gen set, as long as n

    Hi There,

    We would expect this airconditioner to be suitable for your application, though Dometic do not recommend the use of their air conditioners on boats.

    In reagrd to the requiremnt for an H Frame, if the roof is extremely flexible, the frame would be required.

    The Honda generator you have will be suitable for this air conditioner.

  • I have an off grid cabin wired for 240v. Can it be easily installed on a gradual sloping cabin roof with very little roof space?

    Hi There,

    We would recommend contacing Dometic for advice on installation on a sloping roof.

    They can be contacted on 1800 21 21 21.

  • I have an older version of airconditioner fitted to the motorhome and will not start on an 8000watt inverter, keeps throwing the inverter offline can you make any suggestions that would help with this problem

    Hi There

    It is very hard to say what the issue may be exatly.

    We would suggest having the air conditioner looked at by a professional.

  • IS this a direct replacement for Harrier Inverter?My Harrier inverter has stopped cooling and visible oil leak from compressor

    Hi There

    It should be a direct replacement, as the Freshjet 7 Series Plus suits Roof opening (W x D mm) 360 x 360 / 400 x 400 mm

    Kind Regards

  • Can you ship to the UK?

    Hi There

    Unfortuanlety we do not ship overseas.

    Kind Regards

  • Can this unit be fitted into the roof space of a kenworth truck or any truck.

    Hi There

    We have a specific type of air conditoner for trucks; The Dometic CoolAir RTX2000 24V Truck Air Conditioner.

    Kind Regards

  • Can the remote be repaired, cracked glass?Can I purchase a new remote, 8837where can I get it and what is the cost?

    Hi There

    You might be able consult a Dometic Service agent regarding possible repairs.

    New remotes can be purchased from our website SKU: 82-EC-535EC01

    Kind Regards

  • I am replacing an Ibis 3 mounted on a caravan what modification required.

    Hi There

    You should not require any modifications to fit the Harrier in place of the IBIS 3. They both fit in the same openings as one another.

  • Hi I was looking at purchasing a Freshjet 7 Series Air Conditioner and was wondering why they look the same?

    Hi, Yes, they do look the same as they have the same ADB, which is marked as FreshJet 7 Lite. The design of the ADB is in line with the IBIS4. However, the air conditioners themselves are very different, even though they have the same ADB. 

  • We have a 1979 Bedford bus-motorhome. We plan to travel around Aust, and we have a 2kva generator. What Aircon do you recommend? Bus is 10 metres long. Cheers

    Lucky you mate!  This is an easy recommendation:  with your 2kVA (2000 watt) generator and size of your RV, we would certainly recommend the Dometic FreshJet 7 Series Lite Roof Top Air Conditioner.  The will easily start and run from your sizzed generator and the size of this A/C model will suit your larger type of RV. 

    Many thanks, and happy travels! 

  • Hi I saw there was a new Harrier Plus Air Conditioner. What is the difference between the old Harrier and the new Freshjet 7 models?

    Thanks for your question. There are several upgrades including:

    • A weight reduction of 45kg to 44kg (1kg reduction)
    • The compressor in the new model is a New Generation Variable Speed compressor in comparison to a variable speed compressor. This reduces the vibration of the unit and increases the efficiency
    • The nominal compressor capacity has decreased from 3675W to 3600W
    • The rated cooling capacity has decreased, and heating capacity have increased in the new model
    • The start-up current has increased in the new model from less than 6.5A to less than 6.9A
    • An additional fan speed has been added to the new model featuring a Turbo Speed for faster cooldown
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Reviews

Write a product review

Excellent air-conditioner

17 May 2026

Fitted in perfectly in the spot the old one came out of. Works extremely well in all conditions. Very happy with purchase and quick delivery

Dometic

7 April 2026

Review Dometic FreshJet FJZ Plus Inverter Roof Top Air Conditioner 4KW

Bought the new 4kw fjz Dometic air conditioner and

26 March 2026

We previously had a Houghton Belair H3400 air conditioner and it could never seem to keep up on hot days and was noisey and used too much power! We have a 22’6 van so I went for the big girl and very happy I did. Beautifully quiet and efficient and in another league when compared to old non inverter models. No more shaking the entire van when it cuts out. It does everything gradually and smoothly keeping the temperature in the van far more consistent. We also love the inbuilt led light which is operated via the remote control which is great to use while watching tv etc to save getting up to a light switch! These units are honestly ‘next level’ when comes to bringing controlled and efficient climate control to our van and I would give 6 stars if I could.

So Very Stoked

17 December 2025

Purchased Dometic Freshjet 7 Series plus for 20ft caravan. Installed, so quote and efficient - Awesome. I can run it with everything else, on lithium battery set up. The solar panels charge up the batteries during the day when I am away or if in caravan even running the aircon. IF needed, I can top up the batteries with Honda EU22i during the day, so it does not disturb anyone. Then at night, blissful sleep running aircon off of batteries - quite and disturbs no one. Whole new meaning to off grid beach camping - So Very Stoked

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Warranty

Warranty Period: 3 Years

Warranty Details: 

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Delivery

  • We ship Australia-wide with national road express freight companies such as Star Track, TNT and Toll.
  • Small Items are sent with Australia Post via regular post.
  • Delivery times are generally 3-5 days from day of dispatch for major cities (sometimes quicker). Please allow longer for regional and remote areas.
  • Once your item(s) have been dispatched, we will provide you freight tracking information so you can track your delivery to your door.
  • Items are fully insured during the freight process.
  • Unfortunately we cannot deliver to PO Boxes.
  • For further details on our Delivery Process you can visit our Delivery Page HERE.
 

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