ERP (Energy Efficiency)YMaximum Vertical Flue12Years Guaranteed1 year minimum (subject to T&C's)Width370mmTypeBoilers - SystemSolar CompatibleYesNox ClassNOx Class 2Noise Level52dBMount TypeWall MountedMaximum Vertical Flue 125mm0 mMaximum Vertical Flue 100mm8 mMaximum Horizontal Flue 125mm0 mMaximum Horizontal Flue 100mm4 mIncludesBoiler OnlyHeight840mmHeat Output BTU71652Heat Output21 kWFuel TypeOilERP RatingADisplay TypeAnalogue DisplayDepth606mmDHW Output Min and MaxNot applicable for this system boilerDHW OutputNot applicable for this system boilerDHW Flow Rate at 35 Degree RiseNot applicable for this system boilerCH Condensing Max Output21 kWBoiler TypeHeat Only BoilerBTU/h60,001 to 80,000Supplier Part NumberVTXSWH16/21Range DescriptionVortex EcoManufacturer Model NoVTXSWH16/21Brand NameGrant