Qmark Electric baseboard heaters and Cadet Electric baseboard heaters contain a sheathed electric heating element completely immersed in a heat transfer liquid and sealed in a heater-length copper tube. This maximizes the volume of heat storage fluid to prolong the thermal constant of the entire heater.
The strongest animal on Earth is the blue whale. The blue whale is also the largest creature in the entire world.
The term strongest animal can be misleading, but most often it refers to how much an animal can lift relative to its own weight. It was thought that the rhinoceros  beetle was the world's strongest by this standard, capable of lifting 850 times its own weight.