The temperatures are falling and it becomes time to start heating the house. We live on the ground floor and our apartment has a hot air furnace. I don’t like that at all. It’s expensive because very inefficient (and our furnace is 40 years old, so even more energy goes up in smoke), it causes allergies because of the dry air and all the dust it pumps into the air.

So this year I decided to clean the ducts. Fortunately there were already holes cut in the ducts to access their insides, probably from previous cleaning. I opened the panels, started up my very powerful woodworking vacuum cleaner, and dug in. Later, inspired by this picture, I made and extension stick, with a brush and a flashlight attached to it, so I could vacuum and see what I was doing in the darker regions of the ductal cavities.