Specialty Models Home » Tube Heaters » Specialty Models MP3 Series ‘Blast Mode’ for environmental demands.Three performance curve modes.Full proportional-integral derivative logic. -SB -SS Series For wet, contaminated or harsh environmentsConstructed of 304 and 409 stainless steels CX3 Series Single Stage Operation.Meets the NFPA 30A code having a maximum surface temperature of 750°F QTS2 Series Single Stage OperationMulti-burner, multi-exchanger, multi-reflector platform CL3 Series Two-Stage Operation.Meets the NFPA 30A code having a maximum surface temperature of 750°F QTD2 Series Two-Stage OperationMulti-burner, multi-exchanger, multi-reflector platform HLV Series Independent tandem burner design.Requires minimal building penetrations.