I have an Eberspacher Hydronic S3 D6 commercial (24V) and they state that this unit is not classified to installation inside Van (Campervan). Do you know if it's an issue? I have a hard time thinking that this professional version will "leak combusting fumes" compared to their cheaper hydronics heaters. What are your thoughts`? In case it's not allowed to mount inside the van do you then have a box (not just a plate) for underslung mounting? It's a lot more complicated for me to do underslung but if needed I guess I have to. Thanks Jesper Manigoff

Question

I have an Eberspacher Hydronic S3 D6 commercial (24V) and they state that this unit is not classified to installation inside Van (Campervan). Do you know if it's an issue? I have a hard time thinking that this professional version will "leak combusting fumes" compared to their cheaper hydronics heaters. What are your thoughts`? In case it's not allowed to mount inside the van do you then have a box (not just a plate) for underslung mounting? It's a lot more complicated for me to do underslung but if needed I guess I have to. Thanks Jesper Manigoff

This question is related to Eberspacher Espar Hydronic S3 D5E D4E Water Pump Mounting Bracket | 221000513900.

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Answers (1)

Answered by Butler Technik's Matthew Varlow
Posted 19th September, 2025 at 12:54 by Matthew Varlow

Hydronic Systems are typically installed external to the vehicle living space so that there is no risk of fumes leaking from the heater unit exhaust outlet, this is true. Most kits come with an external mounting bracket for this. 
Please see Eberspacher Hydronic S3 Mounting brackets below:

 

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