The thermosiphon has been proving itself this whole Winter. It’s quickly becoming one of the best features of our house design and it’s not hard to imagine why. 100% passive & efficient air circulation taking heat from the stove to every nook and cranny of the house. No power, no fan, no duct.
As a bonus, it animates decorative butterflies. Now I don’t really care about the butterflies; I only like seeing them as an indicator of the free work our house is giving us. They’re a great analog anemometer.