Are Space Heaters Safe in Campers? What RVers Need to Know

Published October 6, 2025 | Last updated September 1, 2026

Space heaters can make a cold camper much more comfortable, but I would not call them automatically safe.

Susan and I have used both a Portable Buddy and a Big Buddy propane heater in our old Class C RV. We used them because it was brutally cold—cold enough that our water lines froze.

We even slept with them running on some of those nights and cracked the ceiling vent to bring in fresh air.

That is what we actually did. But it is not what I recommend readers do today.

The U.S. Consumer Product Safety Commission recommends turning portable heaters off while sleeping, and that is the safer advice to follow.

In our current Class A, we use the built-in furnace and electric fireplace instead of portable space heaters.

Are Space Heaters Safe in Campers?

They can be used safely, but they come with real risks.

Electric heaters can overload RV circuits or overheat a bad outlet. Propane heaters add combustion, carbon monoxide, moisture, and ventilation concerns.

That means the right question is not just, “Will this heater warm my camper?” It is also, “Can I use it safely with my RV’s electrical system, ventilation, floor space, pets, kids, and plumbing setup?”

The CPSC recommends keeping portable heaters at least three feet from bedding, curtains, furniture, and other combustible materials. Electric heaters should be plugged directly into a wall outlet, not a power strip or extension cord.

I think those rules matter even more inside an RV because everything is packed into a much smaller space.

Electric vs. Propane Space Heaters in an RV

For most RVers with shore power, an electric space heater is the simpler option.

There is no open flame and no combustion inside the RV, but you still have to respect the electrical load.

A common 1,500-watt space heater draws about 12.5 amps at 120 volts. That is a big load on one branch circuit in an RV.

On a 30-amp RV especially, running a space heater while the microwave, water heater, air conditioner heat strip, coffee maker, or other high-draw appliance is operating can trip a breaker pretty quickly.

Propane heaters are more useful when you do not have hookups, but they require more caution because they burn fuel inside or near the living space.

What We Used in Our Class C: Portable Buddy and Big Buddy

Mr. Heater Big Buddy propane heater for campers

We personally used both the Portable Buddy and the Mr. Heater Big Buddy in our Class C.

The Big Buddy can put out a lot of heat for a small RV, which is exactly why we used it when the temperatures got really low.

Mr. Heater currently markets the U.S. Big Buddy as an indoor-safe radiant propane heater, but the owner’s manual still requires proper ventilation and warns not to leave the heater unattended while it is operating.

The manual also says recreational enclosures need a window or roof vent open for ventilation.

That matches what we did—we cracked our roof vent—but I would still follow the current manual for your exact model and the CPSC recommendation to turn portable heaters off while sleeping.

If you use any fuel-burning heater in an RV, I would also make sure your smoke alarm, carbon-monoxide alarm, and propane detector are working properly before you start.

Why I Would Not Sleep With a Portable Heater Running Now

We did it in our Class C because we were dealing with extreme cold, and I am not going to pretend otherwise.

But looking back, I would rather be more conservative.

The CPSC’s current guidance is simple: turn portable heaters off while sleeping.

That applies to electric and fuel-burning portable heaters.

If I needed heat overnight in our current motorhome, I would rely on the built-in furnace and electric fireplace rather than a portable heater.

Your RV Furnace Still Matters Below Freezing

This is a big one for RVers.

A portable space heater may keep the living area comfortable while allowing the RV furnace to run less often.

That sounds great until you remember that many RVs use furnace heat to warm the underbelly and protect plumbing.

If your portable heater keeps the thermostat satisfied and the furnace barely runs, the inside of the RV may feel warm while the plumbing below the floor gets dangerously cold.

We learned just how vulnerable RV plumbing can be when our water lines froze during a cold-weather trip.

So if temperatures are below freezing, I would not use a space heater as a complete replacement for the furnace unless you know exactly how your RV protects its tanks and water lines.

Be Careful With 1,500-Watt Electric Heaters

Most portable electric heaters top out around 1,500 watts because that is close to the practical limit of a standard 120-volt, 15-amp circuit.

That means you should pay attention to which outlet and circuit you are using.

Plug the heater directly into the RV wall outlet. Do not use a power strip. I would not use an extension cord either unless the heater manufacturer specifically permits one and gives you the required cord rating.

Check the plug and outlet periodically. If either becomes unusually hot, stop using the heater and get the outlet checked.

Older RV outlets can loosen over time, and a loose connection plus a high continuous load is not something I would ignore.

Do Infrared Heaters Use Less Electricity?

Not in the way many product descriptions make it sound.

A 1,500-watt infrared heater and a 1,500-watt ceramic heater are both using about 1,500 watts when running at full power.

The difference is how they deliver the heat and how comfortable that heat feels—not that one magically creates more heat from the same electrical input.

Infrared heat warms people and objects directly. Ceramic heaters warm the air. Oil-filled radiators heat more slowly but provide quiet, even heat.

For an RV, I care more about the heater’s size, safety features, power draw, stability, and how much clearance it needs than the marketing label on the box.

What Safety Features Should an RV Space Heater Have?

I would look for an electric heater that is certified by a nationally recognized testing laboratory such as UL or ETL and includes overheat protection and tip-over shutoff.

A stable base matters a lot in a camper because floor space is tight and people are constantly walking around the heater.

Keep at least three feet of clearance from bedding, curtains, clothing, furniture, paper, and anything else that can burn.

If you have kids or pets in the RV, I would be even more conservative about placement.

Propane Heaters Add Moisture Too

One thing I noticed with portable propane heat is that combustion adds moisture to the air.

Inside a small RV, that can mean more condensation on windows, walls, and other cold surfaces.

Ventilation helps, but then you are also letting some of the heat escape. That is one of the tradeoffs of using an unvented propane heater in a camper.

What Space Heater Would I Choose for a Camper?

If I had shore power and only wanted supplemental heat, I would choose a compact electric heater with tip-over protection, overheat protection, and a thermostat.

I would plug it directly into a wall outlet and use it while I was awake and in the RV.

If I were boondocking and needed portable propane heat, the Big Buddy is the model I can speak about from personal experience.

But I would use it exactly as the current manual instructs, provide the required ventilation, keep the safety detectors working, and shut it off before sleeping.

My Bottom Line

Space heaters can be useful in a camper, but I would not describe them as a set-it-and-forget-it heating system.

We have used the Portable Buddy and Big Buddy in our Class C, including during cold weather severe enough to freeze our water lines.

Those heaters helped us stay warm, but that experience also taught me that keeping the people warm and protecting the RV are not always the same thing.

Today, in our Class A, we use the furnace and built-in electric fireplace. If I were using a portable heater again, I would follow the current safety guidance much more closely than we did back then.

Use portable heaters as supplemental heat, respect the electrical load, ventilate fuel-burning heaters exactly as the manufacturer requires, keep three feet of clearance around them, and turn them off before you go to sleep.

About the Author:

Hi, I’m Mike Scarpignato, co-founder of TravelTrailerPro.com, RVBlogger.com, and MotorhomeFAQs.com.

My wife, Susan, and I have been creating RV content since 2018. We travel the country visiting RV shows, touring dealerships, reviewing campers, testing gear, and spending plenty of time camping in our motorhome. Most of what we share comes from actually using RVs, making mistakes, fixing problems, and learning what works in the real world.

Susan is usually behind the camera on our RVBlogger YouTube channel, which has more than 215,000 subscribers. We also run RV Camping for Newbies, a private Facebook group with more than 275,000 members, and publish four weekly RV newsletters reaching more than 85,000 subscribers.

Our goal is simple: help beginners and experienced RVers choose the right RV, avoid expensive mistakes, and enjoy the RV lifestyle with a little less frustration.