Webasto Air Top Pro 25 Gasoline 12V Ram Promaster Kit with MultiControl

Quiet Gasoline Parking Heat for Ram ProMaster Camper Van Conversions

For compatible gasoline-powered 12V Ram ProMaster vans, this Webasto Air Top Pro 25 kit combines a compact air heater with Webasto MultiControl and installation components for fuel pickup, exhaust, combustion air and warm-air distribution. It is designed for builders and van owners who want steady, low-noise cabin warmth during road trips and overnight stays. The gasoline heater offers 2,730–7,000 BTU/h (0.8–2.0 kW) of continuously controlled heat plus an 8,500 BTU/h (2.5 kW) boost mode for up to six hours.

Application: Ram ProMaster gasoline vehicles with a compatible 12V electrical system. Included control: Webasto MultiControl. RV use: RVIA standards compliant for RV and camper van applications; compliance of a finished conversion also depends on the complete installation.

Benefits & Everyday Use

• Steady cabin temperature: Stepless regulation adjusts heater output rather than repeatedly cycling at a fixed power level.
• Faster warm-up when needed: Up to 8,500 BTU/h (2.5 kW) in boost mode for up to six hours.
• Quieter overnight operation: Updated fan design and brushless EC drive help reduce operating noise in eco mode.
• Automatic altitude adjustment: Designed for operation up to approximately 18,045 ft (5,500 m), with maximum heating output available up to approximately 9,843 ft (3,000 m).
• MultiControl included: Dash-mounted screen, quick-start operation, heating/ventilation modes and programmable seven-day scheduling.
• Fuel pickup components: The kit includes a fuel standpipe and push-lock connector with adapter elbow and clamps for a suitably planned installation.
• Flexible installation: Compact heater designed for installation inside the vehicle or on the chassis where Webasto instructions permit.

Who Is This Heater Best For?

• Gasoline Ram ProMaster camper vans and Class B RV conversions with a compatible 12V system
• DIY and professional ProMaster van builds prioritizing compact, quiet cabin heating
• Road-trip and overland ProMaster conversions traveling through colder and higher-elevation regions
• Mobile workspaces and specialty ProMaster vehicles requiring heat when parked

Ram ProMaster Vehicle Fitment & Installation

Intended for compatible gasoline 12V Ram ProMaster applications. Confirm the exact model year, fuel tank access and pickup arrangement, electrical system, installation clearances and Webasto instructions. The presence of a fuel standpipe and push-lock connector does not guarantee an identical installation on every ProMaster.

Kit Includes

• Air Top Pro 25 heater unit, 12V
• Webasto MultiControl controller
• Fuel pump DP42
• Air Top Pro 25 electrical wiring harness
• Flexible combustion-air intake tube with silencer, 22 mm × 0.5 m
• Fuel pump wiring harness extension, 6.56 ft (2 m)
• Fuel standpipe / pickup tube, 4.76 × 828 mm, 0.25 in NPT
• Stainless-steel exhaust hose with end cap, 22 mm × 3.28 ft (1 m)
• Exhaust silencer with mounting accessories
• Flexible warm-air ducting, 60 mm × 3.28 ft (1 m)
• Fuel tank push-lock connector with adapter elbow and clamps
• One warm-air outlet with fitting flange
• Installation hardware and accessories
• Mounting plate with sealing gasket

Important: The list above describes this Heatso vehicle-specific MultiControl bundle, not necessarily the contents of a standard Webasto factory heater kit. Install according to the applicable Webasto and vehicle-manufacturer instructions.

Technical Specifications

• Fuel: Gasoline; verify approved fuel specifications in the current Webasto instructions.
• Rated voltage: 12V DC.
• Continuous heat output: 2,730–7,000 BTU/h (0.8–2.0 kW).
• Fuel consumption: 98–350 mL/h.
• Electrical power consumption: Maximum 20 W (heater specification).
• Boost mode: Up to 8,500 BTU/h (2.5 kW) for up to 6 hours.
• Ambient operating temperature: -40°F to 104°F (-40°C to 40°C).
• Altitude capability: Automatic adjustment; operation up to approximately 18,045 ft (5,500 m), with maximum heat output up to approximately 9,843 ft (3,000 m).
• Heater dimensions (L × W × H): 12.6 × 5.0 × 4.9 in (321 × 127 × 124 mm).
• Heater weight: 6.5 lb (2.95 kg); not the complete kit or shipping weight.
• RV compliance: RVIA standards compliant for RV and camper van applications.
• Mounting: Inside the vehicle or externally on the chassis, subject to Webasto installation requirements.
• Mechanical interface: Retains Air Top 2000 STC footplate and air inlet/outlet diameters; overall heater dimensions differ.
• Electrical interface: Heater-side 500 mm wiring harness with 8-pin connector and separate 1,000 mm dosing-pump cable, or the specified integrated harness arrangement.
• Communications: W-Bus, LIN and CI-Bus; Webasto identifies CAN J1939 implementation as forthcoming in the supplied materials.
• Conformity: ECE R10, ECE R122 and CE; designed with cybersecurity requirements according to ISO/SAE 21434.

Webasto Air Top Pro 25 vs. Air Top 2000 STC

The Air Top Pro 25 advances the earlier gasoline Air Top 2000 STC with a wider low-output operating range, boost heating, automatic altitude adjustment and updated electronics. The comparison below refers to heater-level specifications, not the contents of these vehicle-specific installation bundles.

Replacing an Air Top 2000 STC

The Air Top Pro 25 retains the Air Top 2000 STC footplate and air inlet/outlet diameters, but the housing dimensions and electrical interface are different. Do not assume that an existing installation can be reused without changes. The wiring harness, controller connections, installation clearances and vehicle-specific components must be reviewed before a replacement.

FAQs

Will my Webasto heater still keep me warm at high altitudes?

Yes. The Air Top Pro 25 has automatic altitude adjustment for operation up to approximately 18,045 ft (5,500 m). Webasto specifies maximum heating output up to approximately 9,843 ft (3,000 m). Above that point, maximum heating output may be reduced as the heater adapts to thinner air. Actual warmth still depends on weather, insulation and the vehicle size.

Can I replace my Webasto Air Top 2000 STC with the new Air Top Pro 25 without modifying my setup?

Not necessarily. The Air Top Pro 25 preserves the older heater's footplate and air inlet/outlet diameters, but its overall dimensions and electrical connections differ. You may need an updated wiring harness, control connections and changes to the installation layout. Check the exact existing installation and Webasto guidance before treating it as a direct replacement.

Will this kit fit every Ram ProMaster?

No universal fitment is claimed. This bundle is intended for compatible gasoline 12V Ram ProMaster vehicles. Verify model year, electrical system, tank/fuel connection, mounting location and installation clearances before ordering.

Does this kit include a Webasto MultiControl?

Yes. The product described here includes Webasto MultiControl, with a display, instant-start function and programmable seven-day heating schedule. It is not the separate Rheostat version.

Is the Webasto Air Top Pro 25 RVIA compliant?

Webasto describes the Air Top Pro 25 as compliant with RVIA standards for RV and camper van applications. A finished vehicle installation must also follow the applicable Webasto installation instructions and relevant vehicle requirements. RVIA compliance is not the same as claiming a separate RVIA product certification.

Can this heater be installed outside the vehicle?

Webasto states that the Air Top Pro 25 can be installed inside the vehicle or externally on the chassis. The selected location must meet applicable mounting, exhaust, combustion-air, fuel-line and other installation requirements.

What fuel and electrical system does this kit require?

This heater is specified for a 12V DC vehicle system and manufacturer-approved gasoline. Confirm the fuel grade and the vehicle electrical system against current Webasto guidance before installation.

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