Filters use an ‘AND’ logic (results match all of the selected options in the same category). Only the “HQ Location” category uses an “OR” logic.

EXAMPLES:
If you’re only interested in cap and level control systems, leave all the checkboxes in the “Equipment Type” section unchecked.
If you’re looking for suppliers that provide both a filler and a labeller, selecting both options will only display companies that manufacture both fillers and labellers.