Standard Features

• 93% AFUE Efficiency (KB 080-285)
• 90.3% Thermal Efficiency (KB 399-500)
• Modulating Burner with 5:1 Turndown
• ENERGY STAR® Qualified
• ASME Stainless Steel Heat Exchanger
• Direct Vent Sealed Combustion
• PVC Venting up to 100 Feet
• Digital Operating Control
• 2-Line, 16-Character LCD Display
• 30 psi Relief Valve (KB 080-285)
• 50 psi Relief Valve (KB 399-500)
• Automatic Reset High Limit
• Password Security
• Direct Spark Ignition
• Low NOx Operation
• Low Gas Pressure Operation
• Zero Clearance to Combustibles
• Easy Access Terminal Strip
• Natural to LP Gas Conversion Kit
• Inlet & Outlet Temperature Sensors
• Product Service Indicator
• Outdoor Reset
• Pump Relay w/ Freeze Protection
• Low Water Flow Indication
• Domestic Hot Water Prioritization w/Pump Control
• Boiler Circulating Pump w/ Control (KB 080-285)
• Adjustable Leveling Legs
• Sidewall Vent Terminals
• On/Off Switch
• 0—10 Vdc Input Control
• Contacts on Any Failure
• 12 Year Limited Warranty (See Warranty for Details)