- Optimus Radiant Parabolic Dish Electric Space Heater H4439 * Instant, Sun-like Warmth Radiant Heat Source * Energy Savings of 800 or 1200 Watts. * Oscillating of 75 degree and up-down manual tilting * Uses Less Energy Than Conventional Heater * Cool Touch Housing and Ultra Quiet Operation * Overheat Thermostat and Cut-Off Safety Device * Tip-Over Safety Switch * ETLus approval