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What is the maximum ambient operating temperature of the heatsink?

Someone posted on reddit saying the V6 heatsink can’t operate in ambient temperatures higher than 35C, so that it will no longer cool down PLA. Now my inbox has questions in it complaining that enclosures are causing PLA clogs. Has E3D-online established max temp ratings over which the heatsink is no longer effective?

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Hi Michael,

Air cooled HotEnds such as the V6 should not be used in heated build chambers with ambient temperatures hotter than 35- 40°C, for build chambers hotter than these temperature you should be looking at water cooling solutions.

At temperatures exceeding 35- 40°C you will be blowing hot air on to the heat sink there fore the heat sink will no longer be effective, these temperature would be above what we we consider recommended operating conditions.

I would recommend looking at the Titan Aqua or Chimera + water cooled for heated build chambers. (Titan Aqua is only rated up to 80°C for a heated build chamber due to the Delrin gear and stepper motor.)

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Thanks for the answer! Does that temperature range vary by filament type? Wouldn't ABS, for example, have different melting temperatures than PLA and thus have a higher tolerance for heated build chamber temperatures?

Luckily our enclosures are passively temperature controlled by defaul to well within that range, unless of course the customer wants them to be higher and turns off the fan.


Hi Michael,

Yes the melting temperature and glass transition temperature will vary from filament to filament. However our recommendation is still not to use higher temperatures than 35-40°C for air cooled setups. Printing outside these guides lines would be considered not within the operating temperatures of the HotEnd.


What about for a non included chamber? Is the chimera + fan enough for 300C + ?


@lordbbq yes, if you are not using a heated build chamber you are able to print up 500ºC providing the suitable modifications have been made.


Would I need to change from the stock 30mm fan?


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Michael Czeiszperger will be eternally grateful.
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