Questioning if it’s okay to make use of a dehumidifier in your motorhome, caravan or campervan? Apprehensive about damp, mould, hearth, price or practicalities? After years of expertise, right here’s every thing it is advisable to learn about utilizing a dehumidifier while you’re not utilizing the van.
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Utilizing a dehumidifier in a motorhome or camper
Look on any discussion board or group, and also you’ll see a dialogue concerning the practicalities of utilizing a dehumidifier in a camper, motorhome, RV or boat to take away moisture from the air.
Some individuals swear by them, others say they’re a waste of cash. So which is it? For those who’re going to go away your motorhome unused for a time period (normally over winter), do you have to be utilizing a dehumidifier?
Why Moisture is a Downside in Motorhomes
Motorhomes are AWFUL for moisture construct up. The confined area and vary of makes use of (kitchens, loos, residing areas, and sleeping) create the proper atmosphere for moisture to build up.
Simply being in a single for a day causes one thing like a litre of moisture to enter the air. Add to that moist coats, pets, restricted air flow and plenty of sizzling drinks, and you’ll see the way it rapidly builds up- particularly in Autumn and Winter.
Left unchecked, all this moisture can result in a bunch of points that have an effect on each your consolation and the longevity of your motorhome, together with:
- Condensation Buildup: Persistent condensation can result in water pooling on surfaces like window ledges, which can seep into the construction of the motorhome (particularly dangerous when you have any wooden within the base construction.)
- Mould and Mildew: Excessive humidity ranges create a really perfect breeding floor for mould and mildew, which can’t solely injury your motorhome’s inside but additionally pose well being dangers, notably for these with allergic reactions or respiratory circumstances.
- Damp Smells: A musty odour is usually one of many first indicators of moisture issues, brought on by damp materials, carpets, or hidden mould progress.
- Harm to Fixtures and Fittings: Over time, moisture can warp picket fittings, corrode steel fixtures, and injury upholstery or insulation.
- Everlasting Harm: Extra moisture can considerably scale back the lifespan of your van’s inside and result in pricey repairs. For full-time vanlifers or these touring in cooler seasons, addressing moisture is essential to make sure a dry, wholesome residing atmosphere.

monitor the humidity ranges in your camper
If you’re not sure of the humidity degree in your van and don’t have an inbuilt monitoring system, you may add one among these humidity displays to your motorhome or campervan:
For those who’re leaving the van in storage for winter and aren’t there on a regular basis, you’ll most likely favor one thing just like the final one, which has an app and alerts for monitoring the car while you’re not there.
The Issues with Dehumidifiers
So, we all know we don’t need plenty of moisture within the car. Certainly a dehumidifier is the proper solution- sure?
Effectively… perhaps. However it’s not that straight ahead.
Dehumidifiers work by eradicating moisture (humidity) from the air, stopping that moist air resulting in issues like mould and condensation in your motorhome.
They work to take away any extra moisture till it’s in an optimum vary (normally 40-60% humidity).
The difficulty is, most motorhomes and campers aren’t absolutely sealed. They’ve (intentionally) air holes to permit gasoline to flee. There are additionally usually tiny gaps round door frames and window frames (intentionally or brought on by many miles of driving over bumpy roads!)
All of which means- the dehumidifier isn’t glad. As extra (damp) air enters the van, it retains working and dealing… and dealing.
This could result in issues reminiscent of giant electrical drain, burnout and, in essentially the most excessive instances, hearth.
However that doesn’t imply they’re not worthwhile. The truth is, there are some I extremely advocate. Learn on…
Fulltime Vanlife vs Storage
Many individuals who reside full-time of their motorhome or camper don’t have any want of a powered dehumidifer, as they’re always within the car to offer air flow and heating. For that cause, in case you’re in your van so much all year long, I like to recommend one thing like these Moisture Absorbers – a good friend of mine who lives full-time in her van swears by these.
HOWEVER… in case you’re winterising your motorhome (placing it away for the winter), it is advisable to do one among these three issues:

Dehumidifiers Vs Heaters Vs Air flow
As talked about above, there are a few different methods to cope with the winter damp and chilly. Heating and Air flow.
A dehumidifier actively removes moisture from the air, tackling condensation and decreasing the danger of dampness and mildew. Nonetheless, it doesn’t handle the basis reason for moisture. It would heat the air barely, however not sufficient for chilly air to turn out to be heat.
Heating raises the temperature contained in the motorhome, which might help scale back condensation by warming chilly surfaces, however by itself, it doesn’t take away humidity from the air.
Air flow permits moist air to flee and contemporary air to flow into, stopping humidity from increase within the first place. Whereas air flow is crucial for decreasing general moisture ranges, it may be much less efficient in chilly or wet climate when conserving home windows or vents open isn’t sensible.
The best choice is to mix these strategies. which is simply one of many causes it is best to test in your car usually and keep it while you’re not utilizing it.
How Do Motorhome Dehumidifiers Work?
For the aim of motorhome, caravans and campers – there are two forms of dehumidifiers that we’ll take a look at:
- Compressor Dehumidifiers
- Desiccant Dehumidifiers (I’ve additionally added in moveable dehumidifiers, as they work the identical manner for our functions)
Compressor Dehumidifiers
Compressor or Refrigerant dehumidifiers work by drawing in moist air utilizing a fan. This air then comes into contact with cooled coils, the water within the air condenses and drops down right into a water reservoir, whereas the (now dry) air passes by the nice and cozy coils and heats again up, earlier than being launched again into the encircling atmosphere.
As a result of these use cooling and heating strategies, these dehumidifiers normally require mains energy to work. Additionally they require you to empty the water tank usually or they cease working.
I’ve used a compressor dehumidifer for years in my rest room and it’s sensible (particularly for loos with out home windows). It’s additionally nice for motorhomes that are saved someplace with a mains energy supply and may be monitored (like on a driveway)
- How They Work: These use a compressor and refrigerant to chill a coil, inflicting moisture within the air to condense.
- Greatest For: Heat or reasonably cool environments.
- Benefits: Vitality-efficient and highly effective in increased temperatures.
- Drawbacks: Much less efficient in colder circumstances, as they depend on heat air to perform effectively. Want mains energy. Should be emptied usually. Shouldn’t be left on for hours unattended.
Desiccant Dehumidifiers & Moveable Dehumidifiers
Desiccant fashions work utilizing water-absorbing materials to gather moisture. They normally include absorbent supplies like gels, silica beads, or salts. Humid air is drawn over the fabric and because the air cools moisture is collected.
As soon as the absorbent materials is full you’ll need to both change or recharge the pouches or change your complete dehumidifier machine.
As a result of these dehumidifiers use a cloth already in place, they usually don’t want any energy supply in any respect. These are good for motorhomes or caravans that are in storage over winter. The powered variations are higher in bigger areas, however are sometimes noisy.
- How They Work: These use a chemical desiccant to soak up moisture from the air.
- Greatest For: Chilly climates, off-grid or winter motorhoming, small areas like wardrobes
- Benefits: Operates effectively in low temperatures, quieter than compressors. Most don’t require energy
- Drawbacks: Powered variations use extra power in comparison with compressor fashions. Want altering usually to be efficient. Not good for big areas.
Which Dehumidifier to decide on?
So, which sort is greatest in case you’re not utilizing your car all through winter? Listed below are some questions that will help you select:
- Do you retailer your car at residence or very close to by so you possibly can test it each day/ usually?
- Do you’ve 230v energy whereas your van is in storage or on the driveway?
- Will you be capable to get to the van to empty a full container?
If the solutions to those are all sure, then I like to recommend a compressor dehumidifier alternated with a heater like an oil-filled radiator. Depart the heater on, and a couple of times per week, run the dehumidifier.
If the solutions to 1 or all aren’t any, go for a number of non-powered dessicant dehumidifiers. Ideally, go to the car at the very least as soon as per week to place the heating on, air it out and stop giant ranges of moisture increase. (The humidity monitor can actually assist along with your peace of thoughts.)
Remaining Ideas
A dehumidifier generally is a invaluable software in managing moisture in your camper. Nonetheless, it’s not a standalone resolution. Combining a dehumidifier with correct air flow and heating ensures the most effective outcomes for conserving moisture underneath management.
For those who’re nonetheless not sure, begin by monitoring your motorhome’s humidity ranges with a hygrometer and assessing the moisture points you face. With slightly trial and error, you’ll discover the proper stability to maintain your motorhome dry and cosy on each journey. Tell us within the feedback the way you handle moisture in your motorhome—your suggestions might assist others!
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