1. Overview of Webasto Air Top 2000 STC and Espar Airtronic AS3 B2L
For years, the Webasto Air Top 2000 STC has been a go-to 2kW heater, valued for its simplicity, affordability, and broad compatibility with various controller options. It is compact, widely supported, and has plenty of spare parts available.
In contrast, the Espar Airtronic AS3 B2L is the newer contender, packed with advanced features that enhance fuel efficiency, noise reduction, and altitude performance. Released by Eberspacher as part of their third-generation Airtronic line, it includes a smart combustion chamber, optimized fan, and built-in altitude adjustment, making it a strong choice for users seeking reliability and adaptability.
2. Fuel Efficiency
One of the defining characteristics of the Webasto Air Top 2000 STC is its efficient fuel consumption. Operating at lower power, it consumes about 0.14 liters per hour and only 0.27 l/h at full power. This efficiency has made it popular among van lifers and RV owners looking to keep their fuel costs down.
Espar, however, enhanced fuel efficiency in the AS3 B2L with features like a dynamic heating control and a laser-welded combustion chamber. The B2L matches the Air Top 2000 STC’s lower-end consumption of 0.14 l/h but caps at a slightly reduced 0.26 l/h at full power. While the difference is small, the B2L’s precise control enables it to run at optimal levels for longer periods without constantly working at maximum output.
3. Noise, Vibration, and Harshness (NVH)
Noise levels are crucial in any small space. The Webasto Air Top 2000 STC has been reliable but is known to be quite noisy, especially during startup. Some users find the sound disruptive, especially in confined spaces like vans and RVs, where quieter operation is highly valued.
Espar’s Airtronic AS3 B2L takes a significant lead in NVH performance. Espar engineers equipped it with a brushless motor and advanced, stepless heating controls that make the unit operate at a fraction of the noise level of the Air Top 2000 STC. Many users report that it’s nearly silent even at higher output levels, making it an excellent option for those seeking a quieter, more restful environment.
4. Altitude Performance
Altitude performance is another critical factor, especially for users who plan to travel or camp in mountainous regions. The Webasto Air Top 2000 STC performs well at altitudes up to 4,900 feet (1,500 meters). However, users venturing above this limit need to make manual adjustments to maintain performance, which can be tedious for frequent high-altitude travel.
The Espar Airtronic AS3 B2L, on the other hand, has an integrated altitude sensor that automatically adjusts the air-fuel mixture, enabling it to function efficiently up to 9,800 feet (3,000 meters) without manual intervention. This capability makes it an ideal choice for those frequently traveling at high elevations or planning trips across varied terrain.
5. Compatibility and Installation
For those considering an upgrade or replacement, compatibility with existing setups can simplify the process and reduce costs. Both the Webasto Air Top 2000 STC and Espar Airtronic AS3 B2L are designed with standard dimensions, making them easy to install as direct replacements with minimal modifications.
The Airtronic AS3 B2L has another advantage in its backward compatibility with Espar’s older 4kW models, meaning users who previously installed the 4kW Airtronic can easily switch to the 2kW B2L by only changing the fuel metering pump and heater. Webasto’s Air Top 2000 STC, meanwhile, requires only minor adjustments when upgrading from previous Webasto models.
6. Controller Options and Usability
The Webasto Air Top 2000 STC offers compatibility with various controller options, including the Multi-controller, ThermoConnect, and ThermoCall, which allow users to tailor their heating experience. These controllers provide easy operation and remote control options, making it simple to adjust the temperature from the comfort of your bed or cab.
The Espar Airtronic AS3 B2L features an improved sensor-controlled starting sequence, which enhances ignition efficiency while minimizing current draw. This sequence allows for smooth starts and stops, reducing wear on the system and conserving battery life.
7. Spare Parts Availability and Support
Given that Webasto Air Top 2000 STC has been on the market for nearly a decade, spare parts and support resources are plentiful. Installation tutorials and repair guides are widely available online, making maintenance straightforward for those who prefer a DIY approach. This long-standing model remains a popular choice for users looking for reliability with accessible parts and support.
Espar’s Airtronic AS3 B2L benefits from Espar’s solid reputation for durability and support, though it is newer to the market. Espar has also ensured parts compatibility with previous generations to maintain ease of access for replacement parts. Cool-it offers genuine parts for both Webasto and Espar, ensuring top-quality replacements and accessories for lasting performance.
8. Price Comparison
The Webasto Air Top 2000 STC generally has a lower price point, which makes it appealing to budget-conscious users seeking efficient heating without the need for high-altitude capabilities or noise control.
The Espar Airtronic AS3 B2L, with its advanced features, is typically priced higher. For the added cost, users receive greater fuel efficiency, a quieter operation, and seamless performance at high altitudes. It’s a premium choice for those willing to invest in long-term comfort and versatility.
9. Cool-it’s Diesel Heater Installation and Maintenance Services
At Cool-it, we provide complete diesel heater services, including the sale of genuine Webasto and Espar parts and installation by our certified technicians. Our experts are available to install heaters in trucks, RVs, and boats, either in our fully equipped repair shop or through our mobile service for added convenience. With Cool-it’s experience, you can count on your diesel heater being installed safely and optimized for peak performance.
10. Conclusion: Which Diesel Heater is Right for You?
Both the Webasto Air Top 2000 STC and the Espar Airtronic AS3 B2L are excellent options, each with distinct advantages. For users focused on budget, simplicity, and ease of maintenance at lower altitudes, the Webasto Air Top 2000 STC remains a solid choice with a proven track record.
However, if you’re looking for advanced altitude performance, quieter operation, and cutting-edge efficiency, the Espar Airtronic AS3 B2L is worth the investment. Ideal for high-altitude trips and long-term adventurers, this heater offers superior performance and modern features tailored to today’s demands.
At Cool-it, we’re here to help you choose the right heater for your needs and ensure it’s installed and maintained professionally. With our expertise, you’ll be ready to stay warm on all your journeys, wherever they may lead.
