Dometic FreshJet FJZ Plus Roof Top Air Conditioner 4KW
SKU: 9630000082-ADB Learn More»








Product Description
Dometic FreshJet FJZ Plus Roof Top Air Conditioner 4KW, 3 Year Warranty. 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 maxium current draws on their airconditioners which can enable more control of the state of charge in their power systems.
- Up to 13% reduction in interior noise
- Dual axis compressor mount for vibration and noise reduction
- IPX5 ingress protection
- Suits 360mm x 360mm or 400mm x 400mm roof cutout
Included:
Dometic FreshJet Electronic Air Distribution Box (ADB), 9630000073
Dometic FreshJet FJZ Plus Roof Top Air Conditioner 4KW, 9630000082
Specifications
SKU 9630000082-ADB
Brand Dometic
Warranty Period: 3 Years
Product Category RV Air Conditioners
Best for Vehicle Length (m) up to 9m
Heating Capacity (W) 3411
Operating temperature range -2°C to 52°C (Air Conditioner) | -2 to 52°C (ADB)
Refrigerant Type R32
Dimensions (W x D x H) 700mm x 1090mm x 283mm (Air Conditioner) | 518mm x 579mm x 48mm (ADB)
Refrigeration Technology Compressor
Installed Weight with ADB 43kg
Current Consumption Cooling Max (A) 6.89
Cooling Capacity (W) 4000
Current Consumption Heating Max (A) 6.43
Videos
Reviewing The Best Caravan Air Conditioner: The Dometic Harrier Plus (NOW REPLACED BY THE DOMETIC FRESHJET PLUS)
Reviewing The Best Caravan Air Conditioner: The Dometic Harrier Plus (NOW REPLACED BY THE DOMETIC FRESHJET PLUS)
Product Q&A
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What advancements have Dometic made with the new 7 Series Plus unit?
The new 7 Series Plus has a larger colling capacity, an in built air purifier, and improved efficiency meaning longer run time on batteries and generators. The unit has managed to remain the same weight as the previous Harrier Plus unit.
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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.
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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.
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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.
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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.
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Do the new range of Freshjet have the same Air Distribution Box (ADB)?
Yes, the new Freshjet units have one ADB that is standard across the whole range
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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.
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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.
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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.
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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.
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Our caravan has a thicker roof approx 100+ mill and apparently there is a kit to suit, can you supply and what price please?
Yes there is a Dometic Extension Duct (listed as an additional accessory) which a llows fitment of the FreshJet A/C unit to RV's with a roof panel thickness greater than 68mm (up to around 108mm). The Kit includes duct sections, and longer bolts as can be ordered in addition to the main A/C unit.
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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.
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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 7 Series Plus will start and run on any 2000w inverter generator. The manufacturer (Dometic) recommend a 2000w generator, nothing smaller. Many thanks
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Hi, does the FreshJet 7 Series A/C unit have air distribution boards on all four sides? Thanks
Hi Don, no the FreshJet 7 has oscillating outlet vents on the front and back only. The sides have vents for air intake. Many thanks.
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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
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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
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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,
These air conditioners require mains power to operate.
The only way you could have the unit running when the vehicle was in operation would be if you had a large enough 12V to 240V inverter.
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i am replacing a dometic B3300 with a FreshJet 7 should this be ok
It should be fine. The Freshjet 7 can either go into a 360 x 360mm or 400 x 400mm opening. So just double your roof opening beforehand.
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I am replacing an Aircommand Wren. Will the Freshjet 7 without roof midifications
The Freshjet 7 can fit a 360 x 360mm or 400 x 400 mm roof opening so you would most likely need to do a slight modification as the Wren is 356 x 356mm according to the user manual.
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What is the largest size Caravan this will cool?
It will cool up to a Vehicle Length of 8m
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How can I best optimise the performance of my roof-top air conditioner?
Hi there,
Here are some tips to best optimise the performance of your roof top air conditioner:
- Clean the filters of the air distribution box regularly.
- If your caravan has been sitting in direct sunlight for a long period of time, use the 'ventilation' mode with the windows open for a while before switching to the 'cooling' mode.
- Avoid opening doors and windows as much as possible when the air conditioner is running.
- Regularly remove leaves and dirt from the ventilation grilles of the roof top air conditioner. Make sure you do not damage the grilles in the process.
Thanks for your question.
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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.
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Can you please describe the draining system ? Does the long part of the aircon need to be facing the rear of the vehicle ?
Hi There,
The Dometic FreshJet 7 Series Plus has two condensation water drainage channels (one on either side).
These channels allow condensation to flow on to the roof of the caravan to be evaporated.
Please click here to see the installation manual.
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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.
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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.
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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.
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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
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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
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I am replacing an Ibis 3 mounted on a caravan what modification required.
You should not require any modifications to fit the FreshJet Plus in place of the IBIS 3. They both fit in the same openings as one another.
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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.
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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!
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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
Customer Reviews
Fresh jet 7 Review by Kel GadekeGood looking unit, got it over in quick time. Runs cool and quite. Thanks mygen.(Posted on 11 November 2025)
Fresh Jet Plus is Awesome Review by Robert RoneyHad to replace my IBIS 3 with fresh jet plus and so far it's great it gets much colder and is Quiter, just love it(Posted on 26 September 2023)
Dometic harrier plus Review by Norman KingEasy to install & working fine.Service over the phone with Scott was easy with great customer service & delivery time estimate was exact arriving in perfect order.(Posted on 23 July 2023)
Harrier Aircon Review by Tom PageThe Dometic Harrier Plus air conditioner is doing a great job in our 22ft van. Whether on heat or cooling it just does a great job. The inverter technology is superb and hardly makes a noise from start up.(Posted on 7 June 2023)
Warranty
For details relating to this product's warranty CLICK HERE
Delivery
For details relating to our delivery process CLICK HERE
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