As far as I understand it is not possible to combine filtering on product specification attributes and manufacturer.

I think this feature is wanted and will be appreciated by many stores.

Hello,

Thanks for suggestion. We will add it to our roadmap. For now, you can always write a plugin, which will add manufacturers to the filters section.

Best,
Patryk

Hi,
We just prepared plugin for filters product in category by:
Manufacturers, Specifications, Vendors, Attributes

More info you can find here: https://grandnode.com/ajax-filters

Regards
Krzysztof