The Mini Furnace Aspen Infrared Heater may be the most powerful heater on the market. Driven by 8 metal finned quartz infrared elements the Aspen is capable of heating a room quickly and thoroughly. The heating elements are rated at 25,000 hours of tested life expectancy and are guaranteed to last 10 years. While the overall warranty is 3 years, the Aspen is the pinnacle of the Mini Furnace line. The digital LED display is clear to read, easy to program and can be easily changed between the 3 power modes (Eco, Low & High). While the Aspen does not have caster wheels it is a sturdy, furniture like unit that weighs in over 27 lbs. Easy to maintain and operate the Aspens washable rear filter is simple to clean.