Pharaoh ants

We have hundreds of tiny red ants coming out of a heat vent and baseboards. What can we use to get rid of them? Grande Prairie AB.

As you likely already know, ant control methods can be species-specific; what works well against one species may be completely ineffective against another one. That aside, if the ants are indeed tiny (less than 2 mm long), they may be Pharaoh ants, a species notoriously difficult to control. Click here for some advice