5012550A – Webasto Air Top 2000 STC 12V Diesel Air Heater Kit with Rheostat Controller

Description

When dependable heat is needed without draining batteries or idling the engine, the Webasto Air Top 2000 STC is a proven solution. This 12-volt diesel air heater supplies clean, dry heat directly to the cabin, sleeper, or cargo area—making it ideal for overnight use and cold-weather operation.

The heater delivers up to 6,800 BTU (2 kW) of output while maintaining low electrical draw. As a result, it supports extended off-grid operation in camper vans, RVs, and work vehicles. Because air is heated directly, warm air is available quickly after startup.

This version includes a manual rheostat controller, offering straightforward, reliable heat adjustment with minimal complexity. It is well suited for users who prefer simple controls, fleet installations, or applications where advanced programming is not required.

Webasto air heaters are widely used in commercial, municipal, and specialty vehicle applications and are recognized as an effective idle-reduction solution, helping reduce fuel consumption, engine wear, and emissions.

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Key Features & Benefits

• Produces up to 6,800 BTU (2 kW) of diesel-fired air heat

• Engine-off operation reduces idling and fuel costs

• Low electrical draw supports extended off-grid use

• Manual rheostat control for simple, reliable operation

• Compact size fits under passenger seats and tight spaces

• Quiet operation for overnight comfort

• Proven Webasto reliability with wide parts availability

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What’s Included

This complete diesel heater kit includes:

• Webasto Air Top 2000 STC diesel air heater (12V)

• Rheostat manual controller

• DP42 fuel metering pump with harness

• Heater wiring harnesses (approx. 4.3 m / 14 ft)

• Stainless-steel flexible exhaust pipe (1 m / 3.28 ft)

• Combustion air intake pipe (0.5 m / 1.64 ft)

• 60 mm air outlet, inlet, and outlet grills

• Fuel line (approx. 5.5 m / 18 ft) with fuel filter

• 60 mm hot-air duct (1 m / 3.28 ft)

• Fuel standpipe

• Floor mounting plate with rubber base seal

• Clips, fasteners, and hardware

• Installation and operation manual

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Technical Specifications

Heater Model: Air Top 2000 STC
Voltage: 12V DC
Fuel Type: Diesel
Heating Medium: Air
Maximum Heat Output: 2.0 kW (6,800 BTU)
Fuel Consumption: Approx. 0.03 – 0.06 gal/hr (0.12 – 0.24 L/hr)
Electrical Power Consumption: Approx. 13 – 30 W
Ducting Diameter: 60 mm
Maximum Operating Altitude: 5,000 ft (1,500 m)
Dimensions (L × W × H): 12.2 × 4.7 × 4.6 in (310 × 120 × 118 mm)
Weight: Approx. 5.7 lb (2.6 kg)
Control Type: Manual rheostat controller
Certifications: ECE-R10 (EMC), ECE-R122 (heater)

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Applications

• Conversion vans

• Camper vans and motorized RVs

• Light- and medium-duty trucks

• Coach and transit vehicles

• Commercial and fleet vehicles

• Off-highway and municipal equipment

• Ground support and specialty vehicles

• Emergency and service vehicles

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Installation Notes

• Designed for 12V diesel systems only

• Compact heater body supports under-seat installation

• Proper vehicle insulation improves heater efficiency

• Professional installation is recommended

Spare Parts List

Install Guide

Operating Guide