FINLANDIA heaters have STAINLESS STEEL ELEMENTS for long life. STAINLESS STEEL INTERIOR and LARGE ROCK CAPACITY for heat storage. DIRECT ROCK CONTACT WITH HEATING ELEMENTS is necessary to create pleasant, soft heat and to produce the best steam when water is poured over them. FREE AIR FLOW for faster heating. MAXIMUM STRENGTH and DURABILITY from pressed metal design. Finlandia Sauna Heaters have 3-wall construction for cooler surface temperature and greater safety. All Finlandia and Harvia Sauna heaters are UL tested. Cool to the touch baked enamel exterior. Heater dimensions: 16"W x 11"D x 24"H. Wall mounted control should be order separate.