3d Water Vapor Fireplace contain an evaporator, a reservoir, a lamp, and a heater. Here’s a closer look at these components: Evaporator – is what creates the ultra-fine mist in the fireplace. Once the unit is turned on, this is where the water will flow. At that point, it begins the evaporation process that produces the mist that you can feel if you place your hand above the fireplace. https://www.art-fireplace.com/product-list/single-color-3d-vapor-fireplace.html