RRL152-series hot air fans were engineered with a sintered sleeve bearing, with additional lubricant depot for bearing temperatures up to 120°C. This horizontal shaft fan has class H insulation. Supplier ebm-papst Inc. designed the fans for the special requirements that come with circulating hot air in ovens, climate cabinets, meal and dish warmers, and similar appliances. The basic design includes a shaded-pole motor mounted outside the hot area, using special mounting plates and a radial impeller made of FAL sheet steel, stainless steel, or die-cast aluminum to operate in the high temperature zone. If required, the unit can be supplied with sintered sleeve bearings with high-temperature-resistant lubricant or ball bearings.