ERP (Energy Efficiency)YMaximum Vertical Flue12Years Guaranteed1 year minimum (subject to T&C's)Width370mmTypeBoilers - SystemSolar CompatibleYesNox ClassNOx Class 2Noise Level51dBMount TypeFloor StandingMaximum Vertical Flue 125mm19 mMaximum Vertical Flue 100mm19 mMaximum Horizontal Flue 125mm3 mMaximum Horizontal Flue 100mm3 mIncludesFlueHeight908mmHeat Output BTU71652Heat Output21 kWFuel TypeOilERP RatingADisplay TypeAnalogue DisplayDepth800mmDHW Output Min and Max15-21DHW Output21 kWDHW Flow Rate at 35 Degree RiseNot applicable for this system boilerCH Condensing Max Output21 kWBoiler TypeHeat Only BoilerBTU/h60,001 to 80,000Supplier Part NumberVTXSOMECO15/21Range DescriptionVortex EcoManufacturer Model NoVTXSOMECO15/21Brand NameGrant