The epic heat dome settling in to Alberta sucks, thankfully central air conditioning is making the "feels like 41" weather tolerable. Unfortunately our bedroom has just one HVAC vent and it's covered by a dresser. There is a plastic shield to help move air but I wondered if I could help it along. Introducing a roughly made cardboard tunnel to help airflow more. I'm not sure it made a difference but at least I felt like I was trying.