Webasto controller

Webasto Marine Air Heaters, equipped with the advanced Webasto Controller, are the top choice for boaters seeking exceptional compartment and cabin heating. The Air Top Evo 40 model enhances comfort, safety, and heating capacity on boats and yachts. With the Webasto Controller, cabins are heated quickly and efficiently using air heating.

This comprehensive kit, powered by diesel, includes everything needed for installation and configuration, seamlessly integrated with the Webasto Controller for ease of use.


Webasto Marine Air Heaters are a better choice for boaters looking for the best in compartment and cabin heating. Webasto Marine Air Heaters are a quiet and strong source of heat aboard any vessel, operating for up to 20 hours on a single gallon of fuel. For boats and yachts, the Air Top Evo 40 variant provides more comfort, safety, and heating capacity. Cabins are heated quickly and efficiently using air heating. For every boater, the Air Top Evo is a cost-effective retrofit option.

SmarTemp 2.0 Control Included

SmarTemp 2.0 Control Included

Kit Components

  • Heater
  • Fuel Pump
  • Screen
  • Base Seal
  • Heater Wire Harness
  • Fuel Pump Harness
  • Fuel Line
  • Fuel Standpipe
  • Exhaust Tubing
  • Flexible Stainless Steel Exhaust pipe
  • Combustion Air Tubing
  • Flexible Ducting
  • Air Outlets
  • Operation/Installation Manual
  • 2 Year/2000 Hour Limited Warranty

Air Heater Application Concept:

Air Heater Application Concept

Air Heater Selection Tool:


What’s the best air heating system for my boat?

  1. Choose the appropriate length for your boat.
  2. Trace a line to the left from there until you reach the line that corresponds to the waters where you want to work.
  3. Trace a line vertically downwards from there until you reach the line that corresponds to the season in which you want to operate.
  4. Draw a line to the right from there: in the top portion, identify the line that corresponds to your boat type, and then trace a line vertically downwards — this is the preferred approach.

Technical Specifications for Webasto Air Top Evo 40 Kit – 12 V:

ECE R122 (Heater)
E1 122R-00 0385
E1 10R-05 5529
Heat output (kW)
Heat output (BTU / h)
1.5 – 3.5 (4.0*)
5,100 – 12,000 (13,600*)
Fuel, Fuel consumption (l / h)
Fuel, Fuel consumption (gal / h)
Diesel, 0.18 – 0.43 (0.49)
Diesel, 0.04 – 0.11 (0.12)
Rated voltage (V) 12, 24
Rated power consumption (W) 15 – 40 (55)
Rated current (for 12 V) (A) 1.3 – 3.3 (4.6)
Rated current (for 24 V) (A) 0.6 – 1.7 (2.3)
Air Flow against 0.5 mbar ( m3 /h )
Air Flow against 0.5 mbar ( cfm )
max. 132 (140)
77.7 (82)
Dimensions L x W x H (mm)
Dimensions L x W x H (inch)
423 x 148 x 162
16.6 x 5.8 x 6.3
Weight (kg)
Weight ( lbs )
Diameter air outlet (mm)
Diameter air outlet (inch)
Diameter exhaust (mm)
Diameter exhaust (inch)
Weight 24 lbs
Dimensions 23 × 17 × 18 in


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