Dometic Freshjet FJX4 1500 Roof Air Conditioner image 1 Dometic Freshjet FJX4 1500 Roof Air Conditioner image 2 Dometic Freshjet FJX4 1500 Roof Air Conditioner image 3 Dometic Freshjet FJX4 1500 Roof Air Conditioner image 4 Dometic Freshjet FJX4 1500 Roof Air Conditioner image 5 Dometic Freshjet FJX4 1500 Roof Air Conditioner image 6 Dometic Freshjet FJX4 1500 Roof Air Conditioner image 7 Dometic Freshjet FJX4 1500 Roof Air Conditioner image 8 Dometic Freshjet FJX4 1500 Roof Air Conditioner image 9 Dometic Freshjet FJX4 1500 Roof Air Conditioner image 10
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Dometic FJX4 1500 Roof Air Conditioner - Black (Fitted)

£1599.99 (inc VAT) 1849.00
BRAND : Dometic
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This inexpensive Dometic Freshjet FJX4 1500 W roof air conditioner quickly cools the vehicle interior with its efficient, two-way air distribution system. It also dehumidifies the air and filters out dust particles.

Welcome to the world of relaxation and comfort with the Dometic FreshJet FJX4 1500M Roof Air Conditioner. This impressive piece of equipment creates your own personal paradise, allowing you to enjoy a cool and peaceful environment in your motorhome. With its optimized air distribution system, it has been designed for maximum airflow of 6 m³ per minute, so you can stay comfortable in even the hottest climates. Furthermore, its noise reduction technology helps keep disturbance levels low so that you can sleep without being disturbed by loud noise. You can even upgrade the FreshJet FJX4 1500M with a Dometic CleanAir air purifier, which eliminates any bacteria or unpleasant odours while keeping things fresh and clean. With the Dometic FreshJet FJX4 1500M providing optimal cooling and purification, your motorhome or caravan will truly feel a home-from-home!

Powerful yet pleasantly quiet, it ensures travelers can enjoy a comfortable rest. Simply adjust the two rotary knobs on the manual control panel to set the desired temperature and airflow! Our tip: The Dometic Freshjet FJX4 1500M can be upgraded with the Dometic CleanAir air purifier, which effectively filters out bacteria and unpleasant smells.

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
One of the smallest air conditioner units available for caravans and motorhomes of up to 5.5 m in length (or used in larger vehicles as a duo), the ultra-compact Dometic FJX4 1500 leaves enough roof space for solar panels, a satellite dish or even a second FreshJet if you need separate air conditioning areas. 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!

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 Dometic FreshJet if you want separate air conditioning zones. Adjustable air flow encourages effective air distribution, exactly as you need it. Capable of cooling, heating and dehumidifying air: FreshJets offer comfort.

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.


Air distribution box with manual controls offer the following benefits:

  • Optimized airflow for increased efficiency and reduced noise
  • Manual operation with two turning knobs
  • Low-profile design (just 79 mm high) leaves more headroom in the cabin
  • Vertically adjustable outlet vents for individual airflow regulation
  • Reusable dust filter – easy to remove for cleaning

Optimised airflow
Optimised airflow
Low-profile air distribution box with powerful front and back airflow
Convenient manual control
Convenient manual 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

How does the Dometic FXJ4 Series differ from the previous Dometic FJ Series?

  • The roof top air conditioner unit is now lower profile
  • Compatible with the Dometic Smart Phone App
  • Quieter than their predecessors

Dometic FJX4 1500 Roof Air Conditioner Features

  • Quickly cools the vehicle interior and dehumidifies the air
  • Pleasantly quiet operation for a comfortable rest and a peaceful night’s sleep
  • Entry-level model with manual controls – designed for small and medium-sized motorhomes
  • Optimised air distribution unit – increased airflow and less noise
  • Reusable dust filter – easy to remove for cleaning
  • Lightweight design helps save fuel
  • Extremely durable and robust design
  • Prepared for retrofitting of the CleanAir air purifier system


  • SKU number : 9600050999
  • Model : FJX4233M /
  • Model on label : FJX4233MBKAS (Black) / FJX4233MWHAS (White)
  • Product Description : Roof air conditioner, 1500 W, manual controls
  • Dimensions product depth : 752 mm
  • Dimensions product height : 225 mm
  • Dimensions product width : 702 mm
  • Net weight : 25.80 kg
  • Input voltage (AC) : 220-240 V
  • Input frequency : 50 Hz
  • Cooling capacity (ISO 5151) : 1500 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 1500 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.