Do Diesel Heaters Produce Moisture?

DryAir’s selection of construction heaters is sufficient to address the majority of scenarios that any company may face. The diesel heaters are a top-of-the-line device that will supply heat where it is required the most. In addition, we provide a portable diesel heater and a portable propane heater for the client’s convenience, allowing for optimal heat consumption and distribution.

Diesel heaters are among the construction heaters, but we also offer our clients portable diesel heaters and portable propane heaters to assist you progress faster on your building projects. Because the portable diesel heater and portable propane heater are small and portable, you can move them around easily. For drying enclosed structures, both the portable diesel heater and the portable propane heater are ideal options. Your staff will be able to work in a clean, heated atmosphere with low humidity thanks to the portable diesel heater and portable propane heater. The portable diesel heater and portable propane heater are excellent construction heaters that cover all the basics and exceed expectations. Other construction heaters may not be able to handle the moisture in the air, but the portable diesel heater and portable propane heater have CFM airflow to circulate the air and remove the excess moisture.

DryAir understands that when the working environment is ideal, work is easier, so we build our construction heaters to maximize the working environment. The diesel heaters, including the portable diesel heater and portable propane heater, are designed for optimal comfort on the work site. The diesel heaters that we give to our clients are proof that we believe construction heaters are an important component of getting the job done quickly and efficiently. The diesel heaters absorb the moisture in the room, making it easier to work and finish various projects that necessitate a dry environment. In addition, the diesel heaters produce clean air, which is advantageous to the construction crew. Your team may operate in safe and optimal conditions in the clean and dry environment created by our construction heaters, completing the task even ahead of schedule.

Work on your building site can be completed sooner thanks to the high quality of our diesel heaters, portable diesel heaters, and portable propane heaters. Our construction heaters allow you to benefit from an early completion while still completing a high-quality job in a comfortable setting. When one of our construction heaters is used, thawing and curing are greatly enhanced. You can choose between central module heaters, such as our diesel heaters, which have a long reach, or portable diesel heaters or portable propane heaters, which you can easily move to the desired position. We are certain that our construction heaters will provide significant benefits to your project, both in terms of providing a safe working environment for your crew and in terms of establishing ideal thawing and curing conditions.

Does a diesel heater create condensation?

Moisture in the air causes condensation. It then clings onto a cooler surface than the air itself. This is why you’ll find it mostly on windows, but also on the inner roof and anywhere else that hasn’t been adequately insulated.

Where does this moisture come from?

Most of the time, it’s your breath! When you spend time in your van, the air you breathe out is likely to be warmer than the air you breathe in at home. Living in a van with two people and a dog? That multiplies it by a factor of ten!

It can also be caused by cooking without adequate ventilation. When you boil water, steam vegetables, or fry anything delectable, all of that moisture is released into the air.

Another source of condensation is the heating source you have. Some are superior to others. Propane, for example, is known for producing more moisture than other fuels. A diesel heater is known as dry heat since it produces 2x less moisture than a propane heater.

Is a diesel heater dry heat?

The Diesel Heater Planar is your best bet for superior heating performance, especially if you want to travel in bitterly cold temperatures. The Planar heater is a very cost-effective solution due to its incredibly low fuel and power consumption.

Some fuels do not burn effectively at particular temperatures, resulting in ‘wet heat,’ which results in undesirable humidity and condensation. When you choose one of our diesel heaters over other heating choices, you will benefit from a clean, dry heat.

Is diesel heat wet or dry?

You shouldn’t let the cooler weather keep you from traveling in your RV. There are so many gorgeous sites in New Zealand that are enhanced by a blanket of snow. In order to make your drive more enjoyable in these conditions, you’ll want to make sure your RV is comfortable and warm enough. Unless you’re content with spending your days bundled in blankets, you’ll undoubtedly need to consider a heating system for your RV, regardless of the level of insulation provided by the walls.


The heater’s internal combustion process requires air, which is obtained from an external intake pipe (often through the floor) and passed into the combustion chamber. It’s mixed with fuel (diesel or LPG) and fired automatically to heat up a heat-vast exchanger’s surface area. The combustion exhaust air is kept completely separate from the inside cabin air and is blown out the exhaust pipe. Cool cabin air is drawn past the heat exchanger, heated, and then blown back into the cabin by the heater’s internal blower motor.


Because most RVs use LPG for cooking and water heating and diesel to power their engines, you have two fuel options for an air heater. Diesel air heaters have recently been our preferred choice. The following is a list of reasons why.

A – Regulations and Safety

Both diesel and LPG are commonly utilized and regarded as safe fuels. When the system temperature exceeds the design requirement, both diesel and LPG heaters automatically shut off. The obvious benefit of diesel versus LPG is the reduced risk of combustion and inhalation. An explosion, severe respiratory and neurological system damage, and even death can ensue from a leaking LPG fuel line. Although yearly LPG system inspections and gas detectors can help to reduce these concerns, they can never be completely eradicated. These dangers are not present in a diesel system. Diesel heaters can also be used while driving because diesel is rather difficult to ignite. This is a major factor for many people when choosing a fuel source for their new cabin heater. There are a slew of rules governing the installation of gas appliances. The flue for a gas heater cannot be placed too close to a window, door, or other gas appliance intake or outlet, or under an enclosed annexe. These laws may prevent the installation of a gas heater, in which case a diesel heater would be the best option.

B – Superior Heating Performance

The butane portion of your liquid gas combination (60 percent butane – 40 percent propane) will not vaporize well if the temperature dips below 2 degrees. When you just have Butane in your gas bottle, your heater will only burn Propane, and you won’t be able to heat your RV. We strongly advise you to use a diesel heater if you want to take a tour in your RV in really cold weather. Diesel heaters provide a clean, dry heat, whereas LPG systems can create undesired humidity and condensation.

C – Better Temperature Control & Quieter Operation

Current LPG heaters have a single-speed fan that turns on and off as the thermostat dictates. LPG heaters fail to keep a consistent temperature as a result of this. Microprocessors manage combustion and airflow (changing fan speed) in today’s diesel heaters, which can maintain a constant room temperature.

D – Conclusion

Although diesel heaters are more expensive to purchase and operate than LPG heaters, they are less expensive in the long run. You will have year-round usage of your recreational vehicle in absolute luxury, convenience, and safety in exchange for your investment.

Using diesel to heat your RV is a great method to preserve LPG for your fridge while also increasing your ability to freedom camp in isolated regions without having to refill gas cylinders.

When assisting you in selecting a new heater, they will most likely ask you the following questions. The answers to these questions will help you determine whether you need a higher powerful heater (2KW or 4KW) and which installation kit to use.

A – Usage related questions:

  • Will you be spending a lot of time in cold environments? A more powerful heater is advised if you want to remain in a snowy environment.
  • What is the length and width of your motorhome? The majority of our RVs have 2KW heaters. If your RV is larger than a bus, a 4KW heater will heat your space more quickly.
  • Do you have a lot of large windows in your RV? A significant amount of energy is lost through the use of window glass. The more the number of windows, the greater the heat loss.
  • Do you want to heat up multiple regions of your vehicle at once? You can choose a heater with one, two, or three outlets, depending on how many rooms you wish to heat at the same time.

B – Technical constraints:

  • What is the make and model of your RV? Each model of RV has its own installation kit.
  • How big are the ducts in your current heating system? To save money on installation, we recommend using the same duct size.

Our skilled staff is always available to assist you in selecting the appropriate goods for your requirements.


Regardless of which fuel choice you choose, we recommend that you use a competent installer. The amount of effort necessary to install a heater in an RV varies greatly.

A certified technician will connect the LPG connections and certify the gas installation design layout when installing an LPG heater. An annual check for compliance is also required for an LPG heater.

On vehicles with a petrol engine, diesel heaters can be added. In that instance, a second external tank will be required to transport the diesel fuel.

Call our Service Center to talk about your options and needs; they’re here to help you get the most out of your RV.

Is it safe to use a diesel heater indoors?

I was on Facebook not long ago when I came across someone who said that a diesel heater was the best investment they had made for their van. They appeared to be a cost-effective way to heat a mobile house.

Modern diesel heaters are extremely safe, particularly when used inside. They emit less carbon monoxide and are usually more fuel efficient than gasoline engines. In order to prevent overheating and fires, these heaters are frequently equipped with shutdown mechanisms.

Here are some of the safest diesel heaters I recommend if you’re thinking about buying or using one. And here’s what you’ll need to know ahead of time:

Do vented propane heaters cause moisture?

In other words, if an appliance uses fuel (such as propane) and does not exhaust outdoors, it is both increasing moisture to the RV and diminishing its oxygen supply. Time should be limited, and fresh air should be readily available.

Outside exhaust, such as that produced by your furnace or water heater, has no bearing on the moisture level within.

We’ll discuss how to control moisture levels inside and avoid condensation (and mold!) from growing in a future piece.

How does a diesel hot water system work?

The DH Hydronic series uses a diesel furnace to heat a coolant tank, which is then used to heat water via heat exchangers integrated into the tank. After that, the coolant can be pumped to fan heads for optional air heating. The DH Hydronic series is a hybrid storage/instant on demand system that provides instant hot water once pre-heated.

The DH Hydronic Series have the following features:

  • Installs in tight places for smaller RVs and larger, higher-capacity systems for caravans or buses are possible thanks to flexible installation configurations.
  • Watermark-approved tempering valve and fittings are included to ensure that hot water is delivered at acceptable temperatures at all times.

Advantages over Gas

  • Can produce hot water at very low flow rates, such as a dribble, for dishwashing, which an immediate gas system cannot.
  • The first drop of water out of the system is hot; there is no protracted cold flow while the gas is turned on.

Are Chinese diesel heaters safe?

Chris feels that many of these low-cost heaters are made of low-quality materials. The heat exchanger’s thickness, for example, which is prone to burning through to the heated air outlet, allowing exhaust gases to escape. Not only is this a fire hazard, but it also implies that carbon monoxide could infiltrate the caravan’s living space.

Carbon monoxide poisoning is a serious threat, especially in caravans and motorhomes. Due to the enclosed nature of the room, proper ventilation is necessary to prevent the build-up of toxic vapors. Items placed in the RV, unfortunately, can partially or totally obstruct these vents. If a heater is left on overnight and carbon monoxide builds up, the inhabitants will be utterly ignorant of the danger, putting their brains at risk of death or brain damage. This is compounded by the fact that carbon monoxide detectors are still not required in recreational vehicles (even if the unwary still insist on using the gas stove to heat the van).

The brand-name heaters make a big deal about how safe they are. Webasto, for example, promotes safety measures such as:

  • The pump will switch off in the event of an error or fault code, preventing the burner chamber from flooding with fuel.

Before making a purchase, Chris advises checking the specifications of any diesel heater to make sure it includes these safety features.

Can I use a diesel heater in a tent?

As Old Man Winter descends upon the United States, most of us do not consider camping to be a feasible activity. When the temps are in the teens, only the most daring people would attempt sleeping in a tent, right? Yes, you’d be correct for the most part. I don’t normally consider traveling through icy trails and staying in a roof top tent this time of year because I live in Northern Michigan. Until recently, that is. Problems are being imaginatively solved as more people embrace vehicle-based adventure.

Heating a tent safely has been a problem in the past. It has sometimes resulted in disastrous outcomes. Carbon monoxide poisoning has claimed the lives of desperate winter campers. I’ve also witnessed the aftermath of a tent fire caused by the use of a gas heater for warmth. Fortunately, a new option has developed in the form of the low-cost Diesel Heater. This is a more safer way to heat your tent, car, or roof top tent.

Heat Exchangers are among the safest way to heat small enclosed spaces

So, what’s the safest technique to heat a tent or confined space? It’s most likely a heat exchanger. Like the ones found in semi-cab sleeping compartments. Small heat exchangers have been around for a long time, but they’ve been prohibitively expensive for most casual campers. Nonetheless, I keep seeing the phrase “On some of the Overland forums I follow, the term “Chinese Diesel Heater” or (CDH) is used. It appears that our “Friends” in China have knocked off the Wabasto Diesel Heater and swamped Amazon, eBay, and other online retailers with a far cheaper alternative. And when I looked into the all-in-one diesel heaters that were available, the price astonished me. An all-in-one unit might be delivered to your home for less than $200. I felt I’d better give it a shot.

I paid $169.99 on Amazon for a 5Kw Chinese-made diesel heater, and it arrived two weeks later. Prices and delivery times may have changed by now. Although the packaging was adequate to prevent the item from damage, I’ve heard from several other consumers that this was not the case. The unit came with almost no instructions, and when I turned it on, the remote displayed Chinese characters. Thankfully, there is a Facebook page dedicated to people assisting one another with this new piece of equipment. I had the CDH unit up and running in no time, powered by 12 volts and spewing out hot air without a hitch. I did have to buy and solder on a 12v connection because the CDH only had two wires exiting the back panel for power.

Chinese Diesel Heater start-up and test video:

I dragged the FJ Cruiser out of hibernation once I found out how to adjust the fuel flow, which controls how much hot air is pumped out of this tiny gadget. While the temps were in the upper teens, it was time to open the RoofNest Falcon and spend the night. Due to the lack of insulation in most tents, the only way to survive winter camping is with a badass sleeping bag. The Nemo Disco 15, for example. This is my go-to bag for a variety of trips, but never for winter camping. A sleeping bag was probably unnecessary, as you can see in the video. It would have sufficed with a simple blanket.

I ran the CDH for about eight hours, including start-up, preheating, and cooling. I’m certain that the electrical draw and fuel consumption are both low enough that I won’t be left stranded with a dead battery. Alternatively, you could run out of gas in the middle of the night. It’s now time to find a chilly weekend and hit the trails. And see if this diesel heater is the missing piece of the puzzle for me to enjoy four-season Overland camping.

UPDATE: My son and I ran the Diesel Heater for three nights after competing in the Red Clay Rally in the fall. It only used around half of the 1 gallon tank of gas. This was heating both my roof top tent and his three-person Gazelle tent during the Rally. To divert heat to both sleeping spaces, we inserted a “tee” in the duct. In addition, during three nights of use, our Goal Zero Yeti 500 consumed 22 percent of its capacity. These warmers are really effective.

What is a diesel heater?

Another point of contention when selecting a parking heater is the type of fuel heater to use.

So, between the diesel and petrol air heaters, which one should you choose?

There’s just one way to find out: compare the similarities and differences between the two.

A diesel air heater is a heater that runs on diesel as its principal fuel.

This diesel reacts with air to produce heat, which is used to warm the outside of a vehicle.

A typical diesel air heater will only heat the vehicle with a modest amount of fuel.

This means that you must use this type of heater in a car or vessel that runs on gasoline.

The two types of heaters use the same process of heat creation and heat transfer.

With the help of the blower fan, the heat exchanger then discharges the hot air into the vehicle’s system.

Petrol diesel air heaters, like diesel air heaters, are simple to install and run.

Both can draw fuel from the vehicle’s reservoir or have their own separate fuel tank.

Also, both diesel and gasoline air heaters are adaptable systems that provide excellent comfort during the chilly winter months.

So, if you’re having trouble determining which heating system is ideal for you, then these two chapters (3/4) will be of assistance.

Do diesel heaters need to be vented?

It’s always an experience to live in a caravan. What could be more enjoyable than hopping from one location to the next, taking in the sights and enjoying the company of those around you?

Even if your destination is warm and tropical, you will almost certainly experience some cold nights, necessitating diesel installation for those who live in trailers.

People who plan to stay in a caravan have a lot of questions, and one of them is whether or not diesel heaters need to be vented. In summary:

Ventilation is required for diesel heaters. When diesel is burned, it produces a number of gases. These gases are hazardous to your health as well as the health of people within the caravan or vehicle. As a result, there must be a method for the gases to be evacuated from the diesel heater.

I’ve listed some of the safest diesel heaters I can think of. Continue reading to learn more about how diesel heaters work and why venting them is so crucial.