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Dometic Freshjet FJX4 1700 Roof Air Conditioner - White

£2149.99 (inc VAT) 2399.00
BRAND : Dometic
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Modern looks, superior performance: The Dometic Freshjet FJX4 1700 is the new-generation 1700 W roof air conditioner cools down your motorhome, caravan or campervan in record time – with minimal energy consumption, and superbly quietly too. The integrated CleanAir system keeps your vehicle smelling fresh and clean. Rest and relax in complete comfort after an adventure-filled day, and wake up to a new day full of energy!

Welcome to the future of motorhome cooling! With the Dometic FreshJet FJX4 1700, you can cool down your cabin in record time. This roof air conditioner not only features a sleek, modern design but also provides 1700 watts of powerful cooling power – so you’ll reach your desired temperature in no time!

This remarkable piece of equipment is energy-efficient & runs quietly - so your peace and comfort never gets disturbed. And if you’re concerned about lingering smells, mould or allergens, the integrated CleanAir system ensures that the cabin is always fresh and clean. It's even equipped with smart connectivity features for convenient control wherever you are! So whether it’s via remote control, your smartphone app, wall thermostat or a handy touch control on the air distribution box.

This new generation roof air conditioner cuts a good figure on the road and at the campsite. The sleek, modern design of the rooftop unit immediately catches the eye. Providing 1700 watts of cooling power, the Dometic FreshJet FJX4 1700 creates the perfect conditions for relaxing in your motorhome. It cools down the cabin in record time – with minimal energy consumption, and superbly quietly too. The integrated CleanAir system keeps your vehicle smelling fresh and clean, while effectively reducing allergens, bacteria and mould. Smart connectivity features give you various convenient control options: remote control, smart phone app, wall thermostat, or intuitive touch control on the air distribution box.


Our new air purification system uses advanced bipolar ionizer technology to keep your motorhome smelling fresh and clean while greatly reducing allergens, viruses, bacteria and pollutants. Ionizers purify air through several methods. Firstly, they create positive and negative ions to help reduce pathogens, odours, and mould. Bacteria and virus cells are robbed of their life-sustaining hydrogen, reducing their number.

Secondly, odours are reduced when they oxidise on contact with the charged ions. Last but not least, the positive and negative ions attach to the particles in the air. Their attractive forces make the particles big­gre. This in turn allows the standard dust filter of your air conditioning system to remove more particles from the air.


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.

Please note that if you order a non-fitted unit then we will ship this to you on a pallet.

Address of Dometic Fitting Centre:
Dometic Fitting Centre
Unit 31 Alexandra Way
GL20 8NB

Dometic Tewsbury Service Centre
Dometic Tewsbury Service Centre
Dometic Tewsbury Service Centre

The Dometic FreshJet FJX 1700 is the one of the smallest roof air conditioners available that cools, heats and dehumidifies motorhomes and caravans of up to 6 m in length. Achieve the perfect indoor climate!

Vehicles of any size can be air conditioned with the successful FreshJet series, which includes four models in the series. These three FreshJets are the smallest air conditioners on the market. The power versions shown here have the same ultra-compact design, which still leaves space for solar panels or a satellite dish on the roof or even for a second FreshJet if you need separate air conditioning areas. Very low starting currents with FreshJet 1500/1700 and soft start with the 2200 model ensure that the units run smoothly even on campsites with low electrical protection.

One of the smallest air conditioner units available for caravans and motorhomes of up to 6 m in length (or used in larger vehicles as a duo), the ultra-compact Dometic FreshJet FJX4 1700 leaves enough roof space for solar panels, a satellite dish or even a second FreshJet if you need separate air conditioning areas. Its very low starting current ensures that the unit runs smoothly even on campsites with low electrical protection. Efficiently distributing air in two directions, it cools when it's too hot and heats when it's too cold, ensuring on-board comfort all year round!

Air Distribution Box
Welcome to the future of air distribution. The Dometic FreshJet FJX4 1700 looks great and is packed with incredible features that make it a must-have for modern motorhome interiors. The flush-mounted touch display and ambient light will give your vehicle an upgrade in elegance. Inside, the engineers at Dometic have engineered a powerful airflow system, optimized for efficiency and noise reduction. Plus, you can even “fine tune” the airflow direction by simply touching the louvres with your fingertips thanks to their clever design. And finally, they integrated their CleanAir system which uses advanced ionizer technology to keep your vehicle smelling fresh and clean all the time.

Optimised airflow
Optimised airflow
Low-profile air distribution box with powerful front and back airflow
Intuitive Touch Control
Intuitive Touch Control
Simply turn the knobs to adjust the temperature and airflow rate
Adjustable outlet vents
Adjustable outlet vents
Simply adjust the direction of the airflow with your fingertips

Integrated Lighting
Integrated Lighting
Warm white LEDs create a beautiful, soft ambient light
Reusable Dust Filter
Reusable Dust Filter
Easy to remove for cleaning
Reusable Dust Filter
Dometic Climate App
Conveniently control your roof air conditioner from your smart phone

Dometic's FreshJet are among the smallest air conditioners on the market. With different versions to suit different sizes of vehicles, even the most powerful versions share the same ultra-compact design. The space-saving design leaves room on the roof for solar panels, a satellite dish or even for a second FreshJet if you want separate air conditioning zones. Thanks to a very low starting current and soft-start function, the units will even run smoothly on campsites with low electrical protection. Adjustable air flow encourages effective air distribution, exactly as you need it. Capable of cooling, heating and dehumidifying air: FreshJets offer comfort. Integrated LED lighting allows users to create ambient lighting inside the vehicle. All functions are conveniently managed with an easy to use remote control.

In 2011, NASA was on the lookout for an air conditioning system to install in their lunar electric rover. They decided they needed expert help and consulted numerous suppliers. Finally, after a rigorous selection process, the space agency chose Dometic. After extensive trials in Arizona, where the system had to keep scientists and their equipment cool and dry in extreme heat and high-dust levels, Dometic's technology was approved for extra-terrestrial duty. Thanks to our talented engineers and their hard work and dedication in developing innovative solutions to meet NASA’s rigorous technical specifications and safety requirements for this unusual test vehicle, Dometic.

Dometic FreshJet 1700 (FJX4 1700) Roof Air Conditioner Features

  • Superior cooling performance – the cabin is cooled down in record time
  • Quieter than other roof air conditioners available in the market
  • Superior energy efficiency – reduced power consumption
  • CleanAir air purifier system – keeps your motorhome smelling fresh and clean
  • Remote control included as standard.
  • Smart connectivity options – compatible with Dometic smart phone app and premium wall thermostat
  • Air distribution box with touch control panel and integrated ambient light
  • Ultra-compact and lightweight design
  • Cool, warm or dehumidify air at the touch of a button
  • Ideal for vehicles up to 6 m in length
  • Efficient air distribution in two directions
  • Very low starting current
  • Can be used as a duo unit for creating separate climate zones in larger vehicles
  • Can also be used while driving with optional DC kits

Main Functions

  • Optimised airflow for increased efficiency and reduced noise
  • Integrated touch control display – unique in the market
  • Integrated lighting – warm white LEDs for soft ambient light
  • Vertically adjustable outlet vents for individual airflow regulation
  • CleanAir air purifier system – keeps your motorhome smelling fresh and clean
  • Low-profile design (just 68 mm high) leaves more headroom in the cabin
  • Reusable dust filter – easy to remove for cleaning

What is in the box?
You will get the complete Dometic Freshjet FJX4 1700 unit and air distribution box. This is ready to be mounted into a 400x400mm cut-out. Once it is fixed in place it can be connected to a 230v supply.


  • Best for vehicle length : 6m max.
  • Dimensions product depth (Roof Top): 752 mm
  • Dimensions product height (Roof Top): 225 mm
  • Dimensions product width (Roof Top): 702 mm
  • Net weight (Roof Top): 29 kg
  • Dimensions product depth (Distribution Box): 579 mm
  • Dimensions product height (Distribution Box): 48 mm
  • Dimensions product width (Distribution Box): 518 mm
  • Net weight (Distribution Box): 3.90 kg
  • Input voltage (AC) : 220-240 V
  • Input frequency : 50 Hz
  • Cooling capacity (ISO 5151) : 1700 W
  • Certificates : CE, UKCA, eMark, EMC, CB

The refreshing, cool air of an air conditioner can be key to your onboard comfort. This buying guide will help you to understand the different features and benefits of air conditioner models; allowing you to choose the ideal unit for you and your vehicle!

Not all vehicles are compatible with every type of air conditioner:

  • Insulation strengths of individual models can vary and so we recommend speaking to your authorized dealer or service center for the best advice according to your specific vehicle.
  • A vehicle’s length also influences air conditioner choice; powerful units being needed for large internal spaces. In some cases, more than one unit is used.

Dometic Air Conditioning selection chart

Air conditioners are either designed for installation on the vehicle’s roof or inside an internal storage compartment.

Rooftop air conditioners are positioned over the window in your vehicle’s roof. For installation, the roof must be flat and have sufficient space.


  • Storage: it does not use any valuable storage space inside your vehicle. This is particularly beneficial to owners of smaller vehicles with limited internal space.
  • Light: given its position over a window, rooftop units can obstruct natural light. Unless of course you purchase a rooftop unit with an integrated window!
  • Distribution: choose between an air distribution box or, for wider, more targeted distribution, a ducting system.
  • Clearance: it will add to your vehicle’s height - however, a sleek, low-profile rooftop model you’ll barely notice the difference.
  • Heater: since heat rises, rooftop units aren’t optimally placed to heat your vehicle.

An under bench air conditioner is located inside the vehicle – under a bench or in a compartment. It is ideal if your vehicle’s roof is curved or crowded with other devices.


  • Storage: you will lose internal storage space to accommodate the air conditioner.
  • Light: windows are unaffected meaning it won’t block natural light.
  • Distribution: always via a ducting system, allowing a wide distribution of cool air to multiple rooms of your choice.
  • Clearance: your vehicle’s clearance height is not affected.
  • Heater: its low installation position makes it more effective as a heater.

The “cooling capacity” of an air conditioner (sometimes referred to as pull down power) indicates the speed at which it cools air. This feature is measured in British Thermal Units per hour (BTU/h). If you want to feel a drop in temperature as quickly as possible, then choose an air conditioner with a high cooling capacity.

Low-hanging obstacles such as bridges make the clearance height of your RV well worth considering. An obvious solution is to choose an under bench unit which will not add any extra height to your vehicle. However, an aerodynamic, low-profile rooftop unit can add as little as 25cm to your vehicle’s clearance height, making them a great option too.

This product must be installed by a Dometic approved installer, to not do so will affect the warranty on the product.

Dometic Freshjet FJX4 1700 Roof Air Conditioner Video

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If you’ve changed your mind about keeping your purchase, please return it in its original condition with proof of purchase and we’ll exchange or refund it. Unless faulty, this should be within 30 days of receiving your order. By original condition, we’d expect this to mean that you’ve kept packaging and labels, and that the item is undamaged and unused.

For further information of how to return your item, please visit the "Returning an Unwanted/Faulty/Damaged Item" section on our Help Page.