Please see attached diagram showing dimensions of the latest Eberspacher Airtronic S3 D2L heater. For more comprehensive heater manual information on this high altitude capable and quiet-running heater please check out our Butler Technik library link below
https://www.butlertechnik.com/downloads/cms/eberspacher-espar-airtronic-s3-d2l-b2l-technical-description-manual.pdf
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