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How to Stay Cool in an RV WITHOUT Air Conditioning

How to Stay Cool in an RV WITHOUT Air Conditioning

As we head toward the dog days of summer, we’ve gotta talk about staying cool in hot weather. We recently published a post with 11 tips on how to keep an RV cool in summer. We’ve also got a post on 6 tips to try if your RV AC is not cooling. But today’s post features some ideas for how to keep yourself cool, particularly if you can’t use AC. So, read on for some thoughts on how to stay cool in an RV without air conditioning!

Don’t All RVs Have Air Conditioning?

While many RVs do have air conditioning, there are several types of RVs that don’t offer this feature.

Moreover, there are RVers with AC systems that aren’t working for one reason or another. They’re not about to let the lack of AC stop them from traveling, but they do need some tips for staying cool in the summer heat.

And finally, there are many RVers who aren’t able to run their AC unless they’re connected to shore power. For those of us who love boondocking, that’s a limitation we don’t want holding us back, so we’re happy to find alternative ways to stay cool when necessary.

How to Stay Cool in an RV Without Air Conditioning

So, let’s talk about keeping yourself cool when you’re inside an RV without the option to use air conditioning, and the ambient temperature is HOT.

Fans

Perhaps the most obvious suggestion for how to stay cool in an RV without air conditioning is to use fans to cool yourself as well as to cool the RV.

The most common fans to use while camping are either 12V fans or battery-operated fans.

One of the most popular 12V/24V options among RVers and boaters alike are these Sirocco cabin fans by Caframo. They offer a low current draw, 360-degree directional airflow, 12V/24V auto-sensing, 3 speed settings, and 4 timer settings. They’re easy to install and can fold flat up against a wall when not in use.

Sale
SEEKR by Caframo, Sirocco II Fan, Omni-Directional Gimbal Fan for Boats and RVs, Made in Canada, Auto-Sensing DC, 12V/24V, White
  • Fit type: Universal Fit
  • Favoured among boat and RV owners this fan is chosen for its solid performance aesthetics and its ability to stow flat against a wall

Caframo also makes a grill-free 12V option in its Ultimate 757. These compact cabin fans also draw low current and offer 360-degree directional airflow with a tilting head and finger-safe blades. They’re good for tight spaces and tap into the RV’s electrical system.

Caframo Ultimate 757 12V 2-Speed 7 inch Fan - Direct Wire Black
  • Compact, grill-free cabin fan with patented Finger Safe blade
  • 2 Speed settings for maximum comfort

There are also 12V options that plug right into any 12V outlet rather than needing to be installed in one location in the RV.

One such option is this Boundless Breeze RV/marine fan with three settings. Note that reviewers state that while this unit does move a significant amount of air, it does so at the expense of a fair amount of noise:

Quick Products QP-TE1-0126 Boundless Breeze Ultimate RV/Marine Fan - 12 Volt
  • Perfect for your RV, car, boat and more
  • Ten powerful blades offer quiet operation even at high speeds

Then there are the small, clip-on style 12V fans which can be moved from location to location as necessary. These also plug into any 12V outlet and have the option to oscillate.

Sale
Schumacher 121 Oscillating Fan for Cars, Trucks, Buses, RVs, and Boats - 12V
  • COOLING POWER: Effective air circulation for cooling cars, trucks, buses, RVs, or boats; works with your vehicle outlet
  • QUIET OSCILLATION: Quiet, reliable air flow and oscillating motion for full-coverage cooling

And finally, there are a number of battery-operated fans available as well. As always, it’s important to read reviews at all levels to make sure you’re not getting a fan that requires new batteries every day.

These small portable fans are available in 5-inch and 10-inch options and are good for laying a cool breeze on you wherever you are. They fold and store easily and operate on the power of a couple of D-cell batteries (not included), and tend to have good reviews.

Treva 5-Inch Portable Desktop Battery Powered Fan, 2 Cooling Speeds with Compact Folding & Tilt Design (Grey)
  • MINI BATTERY-OPERATED FAN: Cool off when you’re at home, work or outdoors with Treva by O2COOL's 5-Inch Battery-Operated Portable Fan. Available in...
  • DURABLE CONSTRUCTION: To provide long-lasting strength and use, this personal fan is expertly crafted using durable plastic construction with a...
Treva 10-Inch Portable Desktop Battery Fan, Powered by Battery and/or AC Adapter - Air Circulating with 2 Cooling Speeds
  • BATTERY-OPERATED POWERFUL PORTABLE FAN : With Treva’s 10" Battery-Operated Portable Fan, you can cool off wherever you are. Perfectly sized, it is...
  • DURABLE CONSTRUCTION: This portable fan is durably crafted using sturdy plastic construction for long-lasting use with a patented fan blade design...

There are so many options for fans that we should probably do a post just on 12V fans at some point. But for now, you’ve got a starting point if you’re interested in looking into fans as a means of staying cool in your RV without air conditioning.

Now here’s the real trick where fans are concerned…

Mist or Wet Cloth

In order to significantly heighten the cooling effect of a 12V or personal battery-operated fan, misting yourself with water or wiping your skin down with a wet cloth and THEN allowing a fan to blow over you will actually make you cold!

Of course, you could also just mist yourself or wet down your skin and that may be sufficient to keep you cool. But if you find yourself in a situation where there’s just no getting away from the heat, wet your skin and allow a fan to blow over you. You’ll cool down for sure.

Go Barefoot

This may go without saying, but we’ll say it anyway. Wearing socks, slippers, or shoes of any type will warm your body. Keeping your feet cool really does help to keep you cooler in general.

In fact, some people swear by putting clean cotton socks in the fridge or freezer to get them cold, and then putting them on to cool their feet so much that the entire body is cooled.

Wear a Wet or Frozen Neck Gaiter

Those of us who hike frequently are familiar with neck gaiters and buffs. These are tubes of material that are useful as sun or wind protection, but when wet they can act as a fairly significant cooling agent.

Wet the neck gaiter or buff to the degree that you have to wring it out. Either wear it like that or place it in the fridge or freezer for a while and then put it around your neck.

If you’re in very hot, humid weather, you may want to keep a few in the fridge so you’ll have some ready when the one you’re wearing dries out.

For those unfamiliar, these are neck gaiters and buffs:

MISSION Cooling Neck Gaiter 12+ Ways To Wears, Face Mask, UPF 50, Cools when Wet Matrix Camo Blue
  • COOL MORE. DO MORE Enjoy staying active longer & doing what you love even when the temperature rises with the cooling & refreshing MISSION Cooling...
  • COOLS INSTANTLY When activated with water it cools to 30 degrees below average body temperature in under 30 seconds! Activate quickly in 3 steps Wet...
Buff Original Unisex BUFF Multifunctional Headwear
  • 4-way stretch
  • UPF 50 Sun protection
Sale
BUFF Unisex Margo Neckwarmer, Ionosphere, One Size
  • Sport Type: outdoor lifestyle
  • Sport Type: Outdoor Lifestyle

Ice Packs or Frozen Water Bottles Under Pillows

Many people swear by the cooling effect of a frozen ice pack or water bottle under their pillow on hot nights. Having a frozen ice pack or bottle nearby could certainly be helpful if you use it to cool your skin down as well.

Beware that if you’re freezing a bottle of water, you don’t want it to be more than ¾ filled with water when you put it in the freezer, as overfilled bottles can burst.

Also, be sure to keep the potential for condensation in mind, and consider wrapping the bottle or ice packs in a towel to prevent them from getting you, or your bedding, all wet.

Cool Cotton Sheets

Choosing cool cotton sheets is always important in summer, especially when you’re thinking about how to stay cool in an RV without air conditioning. If you’ve still got your flannel sheets on your RV bed, exchanging them for breathable 100% cotton sheets will make more of a difference in keeping you cool than you may think.

Color Sense Full Size 4pc Bed Sheet Set, 100% Natural Cotton Sheets, Crisp Percale Weave, Cool & Breathable Comfort with Moisture Wicking, Deep Pockets up to 17”, Fully Elasticized Fit, White
  • Comfortable Cotton Sheets for an Everyday Indulgence: Experience well made, classic percale sheets specially made to caress the skin and improve sleep...
  • Generously sized 4pc Full Sheet Set - 1 Flat Sheet: 82" W x 96" L; 1 Fitted Sheet with Fully Elasticized Fit: 54" W x 75" L + 15" finished deep pocket...
California Design Den 100% Cotton Sheets - Softest 4-Piece Queen Size Sheets Set, Cool, Breathable Pillowcases, Deep Pockets, 400 Thread Count Sateen Weave Best Bedding Sheets (White)
  • LONG LASTING AND ULTRA SOFT - Each white queen sheet set comes with 1 Flat Sheet (90" W x 102" L), 1 Fitted Sheet (60" W x 80" L + 16" Deep Pocket),...
  • SAVOR YOUR SLEEP - Rest in the softest, coolest, and most breathable 100% pure, long staple cotton. Our fine linen sheets queen in 400 thread count...

Use Your Roof Vent Fans

The roof vent fans in an RV offer an amazing amount of cooling ability when used in the proper manner for cooling the RV. The type with full-size fan blades that cover the entire opening move the most air.

The best way to use your roof vents to cool your RV is to run the fan so that it’s pulling air OUT of the RV, and crack open a window (or several of them) elsewhere in the rig. This allows air to flow through the RV, cooling the living space.

Some RV vent fans have the ability to blow in or out. In some circumstances, if the outside air is cool, you may want to draw the cool air into the RV. But if your goal is to cool the rig using the vent fan almost as a lightweight air conditioner, you’ll want the fan’s air blowing out, with a window cracked open.

Be sure to keep your vent fans clean for maximum effectiveness:

Cover Windows & Skylights During the Day

The sun penetrating an RV through windows and skylights during the day can leave the interior mighty hot. Blocking the sun can be helpful, especially during the hottest part of the day.

Just as shade is cooling, so is providing shade to the rig’s interior by blocking the windows and any skylights from the sun.

With motorhomes, the windshield is often the single largest source of heat. Keeping it covered with a windshield screen is one of the most basic steps you can take to keep heat out. And facing North to avoid direct sunshine on the windshield is a good idea as well.

A simple way to block your windows is to use a product like Reflectix (or another “bubble wrap insulation” product). These conform to any window shape and are lightweight and easy to store.

Reflectix BP48010 Double Pack Insulation, 48 in. x 10 ft
  • Item Weight: 4.6 lb
  • Country of Origin: China

There are products that insulate skylights from the sun’s heat as well. These are inexpensive and well worth using in both hot and cold weather.

Sale
Camco RV Vent Insulator And Skylight Cover With Reflective Surface, Fits Standard 14" RV Vents (45192)
  • RV Vent Insulator with Reflective Surface: Blocks the sun's damaging rays; Helps keep your RV cooler in the summer and warmer in the winter
  • Saves Energy: Reduces heat transfer and increases A/C efficiency

Stay Well Hydrated

It’s always important to be well hydrated but it’s essential to replenish lost fluids in the heat of summer. This is true for so many reasons, not the least of which is the fact that your body can more efficiently cool itself if it is well hydrated.

In order to cool itself, your body perspires. It’s a stroke of genius, really, but it doesn’t work if you’re not well hydrated.

Your mother was right: hydrate, hydrate, hydrate.

Shower in Cool Water Before Bed

If you have the opportunity to shower while you’re camping, doing so in cool (but comfortable) water before bed helps to cool your body before you attempt to sleep.

If you can’t shower before bed, even wiping the day’s “stuff” away and cooling the body with a wet cloth is extremely helpful.

Many campers who aren’t able to shower daily use a product like these disposable washcloths to wash and cool the body prior to going to bed on those hot summer nights. They work, and they save water if you’re boondocking or just don’t have access to a shower.

Adult Washcloth Disposable Moist Wipes - 12 X 8 - 240 Pk
  • Adult Washcloth Disposable Moist Wipes - 12 X 8 - 240 Pk

What Measures Do You Take to Stay Cool in the Summer Heat?

We’ve shared some tips for how to stay cool in an RV without air conditioning, but we certainly haven’t shared them all. What have you done to stay cool in the dog days of summer at times when you haven’t had access to RV AC? Please share your tips in the comments section below.

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Steven

Thursday 16th of June 2022

Crazy thing my grandmother taught me… wintergreen alcohol. Splash it all over you and it’s more cooling than water and the minty fresh wintergreen not only smells wonderful but it adds and additional tingly cooling effect. This is a super cheap solution as the bottle of wintergreen alcohol costs less than $2 at most places.

TheRVgeeks

Thursday 16th of June 2022

Great tip, Steven!

Ro Bennett

Friday 3rd of June 2022

We use thermal curtain panels and a tension room divider to block off the cab to reduce heat and cold coming into the living area of our class A motorhome.

Gay Travel Enthusiast

Friday 3rd of June 2022

Hey guys. They all sound like good ways to cool down during the Summer months. Summer as always been my least favourite time of the year. In worst cases, we've had temperatures in excess of over 100 degrees Fahrenheit! That's fine for places like Arizona, New Mexico, Nevada, SoCal, or Texas, but hardly what you would expect for states further north of there.

Steve at M4

Friday 3rd of June 2022

In addition to all of the great ideas on the article, also reduce your heat load.

When people approach me for LED lights they often first think of power consumption or for more light output, but the heat load is drastically less too and a great reason to switch. A LED will run at a surface temp of just over 100F. An incandescent is well over 200F and a halogen bulb is even hotter than that. For the "seasoned" crowd, think of your RV as a Susie Bake Oven. I have seen a modern luxury coach with 83 10 watt halogens before. Even if you are almost always on shore power, and always have access to AC, reduce your heat load, the AC will work less, and the converter will work less (often the swap will keep the cooling fan on the converter from turning on and making noise).

To also reduce heat load, cook your hot meals outdoors, and use energy efficient electronics, power consumption is generally proportional to heat.

TheRVgeeks

Sunday 5th of June 2022

Thanks for chiming in, Steve! As always, great advice!

Judith

Friday 3rd of June 2022

These a great tips. My problem as a full-timer is that the bathroom gets so hot, that it causes items to get too hot even to the point of melting. We do keep the door open as much as possible. Also, the pantry and other cabinets keep things too hot as well. All we know to do right now is keep cabinets open.

I wish there were AC Bathroom hacks or solutions & cooling hacks for the pantry so we don't have to keep the door open.

Thanks again for the great tips. :)

TheRVgeeks

Sunday 5th of June 2022

We know what you mean, Judith... the same can happen in reverse (getting too cold when it's cold outside)! Leaving bathroom/cabinet door(s) open, running the vent fan, etc, and parking in the shade whenever possible are about all you can do.

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