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PERFORMANCE
Efficiency Footprint Quiet ignition & operation Emissions TOLERANCE Tru-Flow™ Altitude de-rating Gas Train RELIABILITY Casting The Iron Advantage Condensing design Burner Ignition system design Combustion control Rapid response EASE OF INSTALLATION & SERVICE KN6 SERIES KN10 SERIES KN20 SERIES NEWS & EVENTS CASE STUDIES HEATNET DOCUMENTATION
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TOLERANCE TRU-FLOW™ CONTROL IS INHERENTLY CLEAN BURNING. The KN Series boiler uses a unique Tru-Flow™ control strategy to control the fuel-air mixture at all firing rates and venting conditions. The combustion air is constantly measured to fine-tune the fuel gas flow through the gas valve. As an example, with Tru-Flow™ control the KN Series is insensitive to variations in air pressure, therefore it will automatically correct itself for altitude. 
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