When I first purchased the Hcalory HBS-3S diesel heater, I wasn’t interested in most specifications listed. Instead, I pondered over a set of different questions: Would it actually start after being kept in the cold outside with my RV? Would I wake up to the sound of a fuel pump clicking in vain? Would I have to constantly refill the fuel tank? Would the thing even work at high altitudes?
After spending some time with the HBS-3S, I realized which features actually matter when it comes to cold-weather performance.
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The First Issue to Resolve Was Cold Starting
One of the most feared scenarios for me was waking up in a cold RV to find that my heater wasn’t going to start. When camping in a remote area, this is not an inconvenience; it’s the matter of life and death. If the temperature is significantly below zero, I need to resolve the issue as soon as possible.
The Hcalory HBS-3S does a fantastic job at cold starting due to a combination of common sense improvements. Prior to allowing fuel to reach the engine, the glow plug is able to preheat for about a minute. The combustion chamber is modified to allow better airflow, fuel atomization, and heat dispersion. The aluminum body (1.8 kg) also helps in transferring heat.
I appreciate how the HBS-3S isn’t trying to brute-force the cold by burning fuel immediately. It gives the glow plug some time to do its job. As for the working environment, the heater is advertised to function reliably in temperatures ranging from -40C to +40C. That gives me enough confidence when camping in extremely cold conditions.
Then I Thought About the Fuel Line
On cold trips, I tend to notice how cold tubing can be. Trust me; I don’t want to bend a rigid tube when installing it. Even worse, I have to deal with the consequences of the bends after fuel, heat, humidity, and cold have taken their toll on the rubber.
Another detail I loved was the exhaust system. By having the ability to change the direction of the exhaust and utilize a heat protection sleeve, you reduce the risk of the heater damaging other objects and yourself. All of these seemingly mundane details are what I look for in a heater after experiencing one first-hand.
I Didn’t Want to Have to Carry Extra Fuel
One of the last annoyances that I had was dealing with the fuel economy of the heater. When camping in remote areas, I don’t want to constantly calculate how much fuel the heater is going to consume and how much extra fuel I should bring along with me.
A 3.5L integrated fuel tank with a minimum consumption rate of 0.098L/h is quite sufficient for my needs. Assuming that the heater is operating at the minimum rate, a full fuel tank would theoretically give me almost 30 hours of runtime. Now that diesel fuel prices are going up, the HBS-3S’s low fuel usage lets me cut some costs this winter.
Of course, there are times when I need a higher temperature due to the cold outside air. These situations are normal, and I don’t blame the heater for not being able to maintain a higher temperature with minimal fuel consumption. For most trips, however, the low fuel consumption allows me to forget about the heater’s fuel economy.
How Annoying Fuel Pumps Could Be
When camping, especially during the night, the sound of a fuel pump “clicking” can be incredibly annoying. The HBS-3S has a whisper-quiet fuel pump, and I couldn’t be happier about this particular detail. When trying to fall asleep, the last thing I want is the sound of machinery reminding me that it is, in fact, still operating.
If anything, the low noise level allows me to forget that the heater is even running when I’m trying to fall asleep. Another feature I appreciated was the ability to control the temperature of the heater. Whether it was done through the LCD panel, remote, or smartphone app, not having to leave my warm bed to adjust the temperature was a huge plus.
I Took the Heater to Higher Altitudes
The next set of features that became relevant for me were related to operating the heater in high-altitude conditions. As someone that likes to go hiking, camping, and traveling, this was something I had to address eventually. My primary question was whether or not I would have to manually adjust the fuel ratio each time I drove through mountainous regions.
The HBS-3S utilizes an altitude sensing mechanism to automatically adjust the fuel mixture, depending on the ambient air pressure. This means that even when operating in environments with an altitude of 5,000 m, the heater will continue to run reliably without requiring any user intervention. I also like the option of manually switching between 5 levels of heat when circumstances require it.
In my opinion, this feature makes the heater much more suited to RV and camping use compared to other portable heaters. Instead of constantly worrying about the fuel mixture, I can simply rely on the auto altitude sensing function to do it for me.
More Concerned with Maintenance
Most diesel heaters suffer from carbon buildup, especially if they are used at a low heat output for an extended period of time. I don’t want to have to completely disassemble my heater every few months just to clean off carbon deposits.
The HBS-3S has an app controlled carbon cleaning function, allowing me to simply open the app and turn on the high-power carbon cleaning mode. With frequent use, this becomes one of the more important functions for me. Another benefit of this particular feature is that it reminds me to keep the heater clean. Even though it has a low fuel consumption rate, the fuel quality, and proper maintenance still play an important role in the heater’s performance and longevity.
What I Actually Like About the Hcalory HBS-3S
After spending some time with the Hcalory HBS-3S, I would say that its main selling point is not its advertised 5 kW of power.
While this is a nice feature, it is the combination of smaller adjustments which ultimately determine whether or not the heater is worth using in a cold environment. When it is freezing outside, I want my heater to start reliably. When it is cold and I have to sleep in my RV, the last thing I want is to hear a fuel pump clicking every few minutes. When I have to stay in the RV for a few days without being able to return to the main house, I want the fuel consumption to be low. When I drive a mountain road or fly into a higher altitude area, I want the heater to handle the changes in pressure and temperature on its own. When I’m asleep, I want to set the temperature and forget about the heater until morning. After a few months of use, I want the maintenance to be rather simple.
This is why I believe that the Hcalory HBS-3S is a great heater, not only for its high power output. It solves a set of rather annoying tasks that I didn’t even think about prior to acquiring the product. Ultimately, when it comes to cold-weather equipment, I prefer heaters that offer reliability in extreme conditions, not flashiness and unnecessary features.
