Belief 4kW Diesel Air Heater Full Installation Kit (12V) – NEW ALT SP MODEL


Belief 4kW (NEW ALT SP MODEL) diesel air heater full installation kit for vans over 24ft, buses, 5th wheelers. The Belief kit includes all components for a quiet, reliable, quality installation. Backed by 2 year warranty, spares and service from a specialist diesel heater company at a price hundreds of dollars below the European alternatives.

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The Belief 4kW (ALT SP) diesel air heater full installation kit contains everything you need to undertake a complete professional installation to the same standard as the European diesel heater kits at a significantly lower cost. Belief heaters have been sold by Dieselheat for over 8 years and are an established brand representing quality and value for money.

The Belief 4kW heater is a particularly quite heater and has proven to be very reliable in both commercial and recreational applications.


  • brushless fan motor with improved balancing for quite smooth operation*
  • quieter fuel pump (than cheap Ebay heaters)*
  • automatic altitude compensation*
  • full suite of sensors and safety features
  • thermostatic or manual heat control
  • simple to use rotary control


Comprehensive Installation Kits Include:

  • high quality Belief diesel heater
  • custom heavy duty stainless steel mounting plate (made by us)
  • high quality stainless exhaust system with muffler and 2 lengths of exhaust
  • combustion air inlet and fuel pump silencers
  • duct and vents
  • simple to use rotary controller with instructions
  • wiring loom, nuts screws, fuel line etc.
  • choice of quality fuel tank to suit all applications (sold separately)
  • installation instructions written by us based on our experience doing installs
  • 2 year warranty
  • full phone backup and support, spares and service

We are an Australian based business who specialises in diesel heaters, diesel hot water and diesel cookers. We make up our diesel air heater kits to suit Australian conditions and to provide maximum reliability and minimum noise.  We will also make up a specific air diesel  heater kit to suit your boat/van/off grid tiny house/special application Рcontact us to discuss.

Fuel tanks are sold separately. We have a range of suitable fuel tanks, for our range of tanks see here.

  • diesel air heater
  • 2 x exhaust pipe and exhaust muffler
  • inlet air silencer
  • fuel pump silent mounting kit
  • duct and 2 vent kit
  • heavy duty stainless steel mounting plate
  • wiring loom
  • inlet air pipe
  • fuel pump and mount
  • fuel hose and connectors
  • user manual
  • installation instructions
  • rotary controller
  • various nuts
  • screws etc.

Diesel Heater Fitting Instructions

Belief Air Heater User Manual

Belief 4kW Dimensions

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All our products are backed by a two year warranty.

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