Indoor and Outdoor Models Available Available in Natural Gas and LP Models 10-Year Limited Warranty on Heat Exchanger * 3-Year Limited Warranty on Parts * Continuous hot water Energy saving design Compact, space saving design Intelligent electronic controls and sensors Self diagnostic program Digital display shows temperature setting and maintenance codes Exclusive sensing burner technology Exclusive film wrap overheat limiter Built-in electric blower Indoor units use Category III stainless steel vent Indoor models supplied with a 120 Volt power cord Low NOx emissions meet SCAQMD rule 1146 requirements A remote control thermostat is included with all models (100 F - 140 F setpoint range) Requires 18 AWG, 2 conductor thermostat wire for remote control connection. Wire not included. Optional additional remote controls are available. Manufacturer's Certification Statement for Qualified Energy Property Spec SheetsIndoor ModelsOutdoor Models Direct Vent ModelsManualsRTG2-42 IndoorRTG-53 Indoor and OutdoorRTG-53 Direct VentRTG-74 Indoor and Outdoor RTG-74 Direct VentWarrantyHeavy DutyResidential BrochuresShowroom BrochureContractor's BrochureAccessoriesAvailable AccessoriesAccessory ManualsRTG-53X Recess BoxRTG-74X Recess BoxRTG-53 Pipe CoverRTG-74 Pipe CoverEZ-Link InstructionsDirect Vent Sweet Termination