DeLonghi TRH0715 OilFilled Radiator Heater This DeLonghi TRH0715 OilFilled Radiator Heater features specially engineered thermal slots that maximize heat flow, yet maintain a low surface temperature. Convenient premounted wheels ensure safety and stability. With patented smartsnap wheels design, they snap place perfectly with no assembly required. Three heat settings let you adjust output levels optimizing energy efficient operation. It features 7 oil filled fin heating elements for larger heating capacity. Unit is permanently sealed with pure diathermic oil for stable and efficient heating. Safety features include thermal cutoff, rust resistant durable metal construction, fully enclosed heating elements and gently rounded design.