Do You Need Air Conditioning in Your Motorhome?

Ah, the great British summer – one moment it’s pleasantly warm, the next you’re sticking to your seats and wondering if opening every window will do anything at all. When the temperature soars, many motorhome owners debate whether air conditioning is worth the investment. If you’re wondering whether motorhome air conditioning is necessary for your travels, we’ll break it down for you in this guide.

Pros and Cons of Installing an Air Conditioner in Your Motorhome

Installing motorhome air conditioning can make summer trips far more comfortable, but it’s not without drawbacks. While it helps keep temperatures down, it takes up space, uses a lot of power, and adds to costs. Let’s take a look at the key pros and cons to help you decide.

Pros

• Cools Your Motorhome Efficiently:On scorching days, an air con for motorhomes makes the indoor temperature bearable and comfortable. If you’re heading to Europe in peak summer, it can be a game-changer.
• Reduces Humidity: A stuffy motorhome can feel twice as hot when humidity levels climb. Air conditioning reduces moisture in the air, making it easier to sleep and relax.
• Great for Allergy Sufferers: Many motorhome air conditioning UK units come with built-in air filters, helping to remove dust, pollen, and other allergens from the air.
• Boosts Resale Value: If you ever sell your motorhome, having a pre-installed air conditioning system could make it more appealing to buyers.

Cons

• Expensive to Buy & Install: A quality air conditioning unit can cost anywhere from £1,400 to £3,000, and that’s before installation fees.
• Consumes a Lot of Power: Running air conditioning for motorhomes requires a strong power supply, which can trip campsite electrics or drain leisure batteries quickly if you’re off-grid.
• Takes Up Space: Roof-mounted units increase vehicle height, while under-bench units reduce storage capacity.
• Not Always Necessary in the UK: While summers can get warm, many UK motorhome owners only experience a few truly hot days per year, making AC a luxury rather than something you really need.

Considerations Before Installing Motorhome Air Conditioning

Before you invest in air conditioning for motorhomes, there are a few important things to think about. Budget, power supply, and travel plans all play a role in whether an AC unit is worth it. Here are some key questions to ask before making your decision.

1. Where will you be travelling? If you plan to spend summers in Spain, Portugal, or the South of France, air conditioning is almost essential. In the UK, it’s more of a luxury.
2. What’s your budget? Can you justify the cost of installation and ongoing power usage?
3. What type of trips do you take? If you wild camp regularly, for example, relying on an AC unit without a campsite power source can be tricky.
4. Where will you install it? Roof-mounted units free up interior space but increase vehicle height. Under-bench models keep the exterior sleek but reduce internal storage.
5. Do you need extra features? Some motorhome air conditioning units also work as heaters or have built-in air purifiers.

Types of Motorhome Air Conditioning

When it comes to air con for motorhomes, there are a few different options to choose from. The best type for you will depend on your budget, available space, and how often you’ll use it. We’ll take you through the main types of air conditioning for motorhomes and their pros and cons.

1. Roof-Mounted Air Conditioning

Roof-mounted units are the most common option. As you probably guessed, they are installed on top of the motorhome, replacing or fitting alongside a skylight. Of course, they have their pros and cons:

Pros

• Saves interior space by keeping everything on the roof
• No impact on storage compartments
• Efficient cooling and air distribution

Cons

• Increases vehicle height
• More expensive than other options
• Requires professional installation

2. Under-Bench Air Conditioning

Under-bench units are installed inside the motorhome, usually under seating or inside storage compartments. In other words, you won’t have to block out your skylight or sacrifice other motorhome accessories because you’ve run out of space! Even so, there’s more you should know:

Pros

• Doesn’t affect vehicle height
• Better weight distribution
• Keeps natural light from roof windows

Cons

• Takes up valuable storage space
• Ducting may be required
• More difficult to retrofit

3. Portable Motorhome Air Conditioner

Portable air conditioners offer much more flexibility. However, they aren’t specifically designed for motorhomes. There are two main types of portable air conditioners:

Integrated Air Conditioning Unit

A single unit that houses both hot and cold components. It vents hot air through a window or door, kind of like a tumble dryer. It’s easy to move but of course requires an open vent to work properly.

Split Air Conditioning Unit

Then, there’s the two-part system, which features one unit inside the motorhome and one outside. It’s often more popular because it takes up less space inside than integrated units. Plus, it only needs a small opening for airflow between the two units.

Pros of Portable Air Conditioners

• Cheaper than fixed units
• Can be used at home when not in the motorhome
• No professional installation needed

Cons

• Takes up floor space
• May not be as powerful as fixed units
• Requires an open vent or small window gap

The Top Air Conditioner Brands

Not all motorhome air conditioning units are created equal, so choosing a reliable brand is just as important as selecting the right type. A good air conditioner should be efficient, durable, and suited to life on the road. Currently, the UK motorhome and caravan air conditioner market is dominated by two brands, Dometic and Truma, so let’s look at both in detail.

1. Dometic

Dometic is one of the most recognisable names in the biz, offering a wide range of air conditioning for motorhomes. The Swedish brand is known for its high-performance cooling solutions, with models designed to be energy-efficient, durable, and space-saving. Whether you prefer a roof-mounted or under-bench unit, Dometic has a bunch of options.

Popular Dometic Models

 

Dometic FreshWell 3000 – This is a compact under bench / floor mounted air conditioner that can supply both cool air and warm air. The FreshWell 3000 has a cooling capacity of 2700 watts / 9200 BTU/h and warm air heating Capacity of 3000 watts / 10230 BTU/h. The Dometic Freshwell vents through the floor of the motorhome meaning it can be fitted in more places and there is no risk of water ingress from failed seals. Roof space can be quite cluttered with roof lights, tv aerial, satellite etc the great thing about the Dometic FreshWell, it doesn’t take up valuable roof space or increase the vehicles height.

Pros	Cons
Floor Vented – No Leaks possible Doesn’t Increase Vehicle Height Can Replace Space Heater Low Centre of Gravity Better distribution around the Motorhome Low Start-up Current	Needs to be Ducted around the Motorhome Compressor Noise inside the Motorhome Consumes Internal Storage Space

 

 

Dometic Freshjet 1700 – This is a rooftop caravan and motorhome air conditioner which usually replaces a skylight, if not a new hole needs cutting. This is the most common type of air conditioner and one of the easiest to fit even though it does need to be fitted by a Dometic Approved Installer for the warranty to be valid. The Dometic Freshjet range provides cooling capacity up 2516W / 8600 BTU/h and heating up to 3107W / 10600 BTU/h. The latest models come with super-bright LED lights which are great at night but also help in the day if the unit replaced a skylight.

Pros	Cons
Main Bulk of the Unit Outside Compressor Noise Outside Dehumidify setting Removes Moisture Powerful LED Light Low Start-up Current	Increases Vehicle Height Replaces a Skylight or Uses Roofspace Weight High Up – High Centre of Gravity More Expensive than FreshWell Only Cools / Heats One Location

 

Dometic FreshLight 2200 – The Dometic FreshLight is very similar to the Dometic FreshJet but the main difference is the integrated skylight. Roof mounted air conditioning units usually replace a skylight when fitted which obviously reduces light and ventilation in the motorhome. The skylight part of the unit opens just like a normal skylight and includes both black out blind and fly screen. The Dometic Freshlight 2200 has a cooling capacity of 2050 watts / 7000 BTU/h and a heating capacity of 2700 watts / 9200 BTU/h.

 

 

 

Dometic air conditioners are widely available in the UK. Their sleek, modern designs make them a great addition to any motorhome setup. They tend to be on the pricier side, though, so if you’re a budget-conscious buyer, you may need to consider cheaper alternatives.

2. Truma

Truma is a German company that has been producing motorhome appliances since 1949, also earning a reputation for high-quality engineering and reliability. Their air conditioning for motorhomes is designed to provide efficient cooling with minimal power consumption, making them a solid choice if you value performance and durability.

Popular Truma Models

 

 

Truma Aventa Compact – Truma describe this model as the lightest and quietest roof-mounted motorhome and caravan air conditioner in its class. Lightweight and compact enough to fit even on small vehicles, it is specially designed to take up the smallest amount of roof space. The Truma Aventa Compact Plus model offers an impressive cooling power of 2200 watts / 7500 BTU/h. Like most modern air conditioning units there is a remote control but the Truma Aventa is also iNet ready. Truma iNet allows you to control the climate in your motorhome using up to 4 different phones or tablets, the system will use your Truma heating or air conditioner to get the temperature just right.

Pros	Cons
Main Bulk of the Unit Outside Compressor Noise Outside Takes up Less Roofspace than Similar Models Truma iNet Compatible Can be controlled from Smart Phone / Tablet Compact Air Distributor	Increases Vehicle Height Replaces a Skylight or Uses Roofspace Weight High Up – High Centre of Gravity Only Cools / Heats One Location No Heating function High Power Start-up, May Trip Some Sites

 

 

Truma Aventa Comfort – The Truma Aventa Comfort is similar to the Truma Aventa Compact. The Comfort version is the fully-fledged air-conditioning unit with all the features but a slightly less compact external unit. The Avent Comfort has a higher output of 2400 W / 8200 BTU/h of cooling power and unlike the Compact, the Comfort is fitted with a heat pump outputting 1700 W / 5800 BTU/h.

Pros	Cons
Main Bulk of the Unit Outside Compressor Noise Outside Truma iNet Compatible Can be controlled from Smart Phone / Tablet Includes Space Heat Function	Increases Vehicle Height Replaces a Skylight or Uses Roofspace Weight High Up – High Centre of Gravity Only Cools / Heats One Location High Power Start-up, May Trip Some Sites

 

 

Truma Saphir Comfort RC – This is an air conditioning unit that can be installed inside a storage compartment. At a weight of just 23.5 kg, it won’t increase your payload excessively. It is lighter than an equivalent roof mounted unit, has a much lower centre of gravity when fitted to the vehicles and doesn’t take up any valuable roof space or replace a skylight. If you can afford the loss of storage space and run the necessary ducting, the under-bench air conditioners are usually the best choice. The Truma Saphir Comfort RC has 2400 W / 8200 BTU/h colling capacity along with 1700 W / 5800 BTU/h heating output. As with all modern Truma equipment it come with a remote control and is iNet compatible allowing it to be controlled from a smart phone or tablet.

Pros	Cons
Floor Vented – No Leaks possible Doesn’t Increase Vehicle Height Can Replace Space Heater Low Centre of Gravity Better distribution around the Motorhome Truma iNet Compatible Can be controlled from Smart Phone / Tablet Includes Space Heat Function Fan Operates Quietly in Sleep Mode	Needs to be Ducted around the Motorhome Compressor Noise inside the Motorhome Consumes Internal Storage Space High Power Start-up, May Trip Some Sites

 

Truma air conditioners are trusted for their durability and smart features. They’re especially because of the iNet system that allows for remote climate control. However, some of their models require additional ducting for proper air circulation, which can take up valuable storage space.

Tips on How to Maintain Your Air Conditioner

Keeping your motorhome air conditioning in good condition guarantees it runs efficiently and lasts longer. Regular maintenance prevents breakdowns, improves cooling performance, and reduces energy consumption. A little care can save you from costly repairs and keep your motorhome comfortable, so be sure to:

1. Check and Clean Filters Regularly

Your air conditioner’s filters trap dust, dirt, and allergens, keeping the air inside fresh. Over time, clogged filters make the unit work harder, reducing efficiency and increasing energy use. Clean them by vacuuming surface dust and washing them in warm, soapy water, and replace carbon filters annually.

2. Check for Warning Signs and Damage

If your AC is making strange noises, struggling to cool, or leaking, it may have a problem. Rattling or buzzing sounds could indicate loose parts, while weak airflow may suggest a blockage or refrigerant issue. Catching these signs early can prevent bigger and more expensive repairs.

3. Cover When Not in Use

A roof-mounted air conditioner is exposed to dirt, rain, and UV damage, which can wear it down over time. Using a fitted cover helps protect the unit from debris and extends its lifespan. If you have an under-bench unit, ensure vents remain clear when storing your motorhome.

4. Keep Air Vents Clear and Unblocked

For an AC unit to work efficiently, air must flow freely throughout the motorhome. Avoid blocking vents with furniture, bags, or bedding, as this can reduce cooling performance. Regularly check and clean vents to ensure unrestricted airflow.

5. Inspect the Roof Seal on Roof-Mounted Units

Roof-mounted air conditioners need a strong seal to prevent water leaks. Over time, seals can crack or shrink, allowing moisture to seep inside and cause damage. Check the seal regularly and reapply weatherproof sealant if needed.

6. Test Your Air Conditioner Before Your Trip

The last thing you want is to find out your air conditioner isn’t working once you’re on the road. Before setting off, turn it on for 15 minutes to check that it’s cooling properly. If you notice weak airflow or unusual sounds, get it checked before your trip.

7. Schedule Professional Servicing

Even with regular maintenance, a professional service every two to three years keeps your AC running smoothly. A technician can check refrigerant levels, inspect components, and clean coils to improve efficiency. If you have a Dometic or Truma unit, servicing by an approved installer may even be required to maintain the warranty

Additional Tips for Keeping Your Motorhome Cool

Installing motorhome air conditioning is a great way to stay comfortable, but it’s not the only way to beat the heat. There are plenty of simple and effective ways to keep your motorhome cool without relying entirely on air conditioning. Whether you’re looking to save energy or just need a backup plan, here are some extra tips to help beat the heat.

1. Park in the Shade

• Choose a shaded area under trees or buildings to reduce direct sun exposure.
• Position your motorhome so that the largest windows face away from the sun.
• Move your motorhome throughout the day if possible to stay in the shade.

2. Park Near Water

• Camping near a lake, river, or the coast provides natural cooling.
• Breezes from the water help regulate temperatures inside your motorhome.
• If the heat becomes too much, take a dip to cool off.

3. Use Window Covers or Reflective Screens

• Install thermal window covers to block out heat.
• Use reflective sunshades on windshields and skylights.
• Close blinds and curtains during the hottest part of the day.

4. Improve Ventilation and Airflow

• Open windows and roof vents to create cross-ventilation.
• Use 12V extractor fans to pull hot air out of the motorhome.
• Avoid blocking vents with furniture or storage.

5. Invest in a Cooling Fan

• Use a battery-powered or 12V fan for better air circulation.
• Choose a misting fan for added cooling on particularly hot days.
• Place fans near open windows to bring in fresh air and push hot air out.

6. Purchase a Cooling Pillow

• Use a gel-infused memory foam pillow to regulate body temperature.
• Keep a cooling pillow in the fridge before bedtime for extra relief.
• If you don’t have a cooling pillow, try flipping your pillow regularly for a cooler side.

In Summary

Installing motorhome air conditioning in the UK is a personal choice, depending on budget, travel destinations, and comfort preferences. I think we can all agree that air conditioning for motorhomes is fantastic in hot climates. There are, however, plenty of alternatives to staying cool without breaking the bank.

FAQs

Why not use the cab air conditioner?

The cab air conditioning system only works when the engine is running, so it’s not practical for cooling the entire motorhome when parked. It’s also designed for a small, enclosed space, meaning it won’t effectively cool the larger living area of your motorhome. Relying on the cab AC could also drain your fuel unnecessarily if left running for long periods.

How much does an air conditioning unit for a motorhome cost?

The price of a motorhome air conditioning UK unit typically ranges between £1,400 and £3,000, depending on the model and features. Installation costs vary, and many manufacturers require installation by an approved professional to maintain the warranty. Running costs depend on electricity usage, but many campsites charge a flat rate for power, which can help keep costs manageable.

How long do motorhome air conditioners last?

A well-maintained air conditioning for motorhomes unit can last 10 to 15 years, depending on usage and care. Regular maintenance, such as cleaning filters and checking for leaks, can extend its lifespan. If you buy a second-hand motorhome with an existing AC unit, it’s a good idea to inspect it for debris and ensure it’s still functioning properly.