Condensing - Grant UK

Grant Condensing TechnologyContentsWhat is a condensing boiler?Condensing boilers differ from traditional boilers in that they are designed to captureheat normally lost through the flue system during the combustion process. Unliketraditional oil-fired boilers the Grant Vortex condensing boiler has a built-in stainlesssteel heat exchanger incorporating Grant’s unique turbulator baffle system, whichcools the gases to a point where the latent heat, normally lost to the atmospherethrough the flue, can be usefully extracted. The additional energy recovered enables theboiler to operate continuously at much higher efficiency levels, resulting in lower heatingand hot water running costs.Typical annual running costs comparison*RunningCosts per £0 200 400 600 800 1000 1200 14002. Grant Company ProfileOil-firedCondensingOil-fired Non-Condensing£695£835AVERAGE3. Grant CondensingTechnology4. Grant Vortex EcoUtility RangeElectricityEconomy 7£8456. Grant Vortex EcoOutdoor RangeLPGEZ-Fit Flue SystemsAll Grant boilers are supplied for connection to either a ‘stainlesssteel’ conventional flue, or one of Grant’s EZ-Fit Flue options. Theflue systems are available as low level, high level or vertical kits, forinternal and external applications, and even as unique EZ-Flexi Packs,designed to enable condensing boilers to utilise an existing chimney.Combining oil and renewable technologies£1280*Figures reproduced with kind permission from Sutherland Tables, showing a5-year average running cost for a 3 bedroom house in the UK up until May 08.With constantly rising fuel costs, an ideal way to ensure yourhousehold is as energy efficient as possible would be to combineyour new Grant oil-fired system with a renewable technology likeGrant Solar Thermal. This easy to install option can provide upto 70% of your hot water needs and is the perfect match withoil-fired condensing boilers.For details on all green Grant products including solar thermal,PV, biomass, air source heat pumps, cylinders, and Grant’sunique GEO360 energy management control systemvisit: www.grantuk.com or alternatively call the SalesDepartment on: 01380 7369208. Grant Vortex EcoWall Hung Range10. Grant Vortex ProKitchen/Utility Range12. Grant Vortex ProOutdoor Range14. Grant Vortex ProCombi Range16. Grant Vortex ProBoiler House Range18. Energy ManagementControlsT: 01380 736920 W: WWW.GRANTUK.COM 3

Grant Vortex Eco Utility RangeIntroductionThe Grant Vortex Eco Utility Range was launchedas a direct response to customer demand for acompetitively priced condensing boiler.The Eco models incorporate the latest version of theGrant Vortex stainless steel heat exchanger. Outputsrange between 15kW and 35kW (50-120,000Btu/h) withSAP 2009 gross seasonal efficiencies of 90.3 - 90.8%gross.As you would expect from a product with this pedigree,Grant Vortex Eco Utility boilers are exceptionallyquiet in operation and feature the latest Riello burnertechnology. The boilers also have a simplified casing,control panel and pipework arrangement, making themthe ideal choice for utility room installations.All standard Eco Utility boilers are designed to allowthe burner and combustion chambers to be servicedfrom the front, however, models fitted with a sealedsystem kit require top service access.860Dimensions (mm)Grant Vortex Eco Utility15-21 and 21-26430860Grant Vortex Eco Utility 26-35712 8317624281778860ø31445605TRAP EXTERNALDRAIN EXITLEFT HANDTRAP INTERNAL DRAINEXIT LEFT HANDHIGH LEVELTRAP INTERNAL DRAINEXIT LEFT HANDLOW LEVELø31616119ø38TRAP EXTERNALDRAIN EXITLEFT HAND719587TRAP INTERNALDRAIN EXITLEFT HANDHIGH LEVELTRAP INTERNALDRAIN EXITLEFT HANDLOW LEVEL8286441Condensate removalThe condensate trap is now factory fitted within the whitecase on Grant Vortex Eco Utility boilers, but can also bepositioned externally if preferred.FlueingUtility models are compatible with all of Grant’s EZ-Fit flueoptions and capable of being flued from the top, rear, leftor right hand sides of the appliance.Sealed system kitsGrant Vortex Eco Utility models can also be convertedto sealed system operation, by adding a sealed systemkit (Product code: VTXECOSSKIT35). This optional packfits all models and can be neatly housed within the boilerenclosure. It includes a filling loop, expansion vessel,pressure gauge and circulating pump.4

SAP 2009Eco Efficiency . . .90.3 - 90.8% GrossGrant Vortex Eco Utility ModelsVTXECO1521 VTXECO2126 VTXECO2635Boiler ON/OFFSwitchBoilerThermostatOverheatThermostatMulti-directional HeatingFlow (Not shown)Front ServiceAccess DoorMulti-directional HeatingReturn (Not shown)Internal condensate trap(with external option)Riello RDBBurnerModel shown:VTXECO1521(front view)Technical specificationsVortex EcoWall-MountedProgramer OptionsModelEco Utility Models15-21 21-26 26-35Output kW 15 to 21 21 to 26 26 to 35Output Btu/h 50-70,000 70-90,000 90-120,000Flow connection 22mm 22mm 22mmReturn connection 22mm 22mm 22mmOptional Grant ES Kit,Wall-mounted twin-channelprogrammerCold water in (system kit) 15mm 15mm 15mmPressure relief (system kit) 15mm 15mm 15mmCondensate pipe21.5mm OD plastic overflow pipeNOTE 1: The boiler flow and return connections exit the casing on the left or right hand side.NOTE 2: Grant Vortex Eco utility boilers are suitable for fully pumped systems only.Optional Grant RS Kit Wall-mountedprogrammable room thermostatT: 01380 736920 W: WWW.GRANTUK.COM5

Grant Vortex Eco Outdoor RangeIntroductionGrant developed the first oil-fired external boilerin 1986 and although the concept was new to theoil market, it quickly became a popular addition tothe range. Today, as around one in four oil boilerinstallations are external, Grant have expandedthe number of options available with the launch ofthree competitively priced Eco external modules.The models have outputs between 15kW and 35kW(50-120,000Btu/h) and SAP 2009 gross seasonalefficiencies of 90.3 - 90.8% gross.External finishThis high efficiency Eco external range has someunique features including multi-directional flueingoptions, high quality external powder coated paintfinish, built-in boiler frost protection, mains isolatingswitch and a test switch.Dimensions (mm)Grant Vortex Eco External15-21, 21-26, 26-35Sealed system kitsEco external boilers can be converted to sealedsystem operation by purchasing a pre-assembledkit from Grant UK (Product code: VTXECOSSKIT35).The sealed system kit includes an expansionvessel, automatic air vent, pressure relief valveand circulating pump. A filling loop and pressuregauge are also supplied as part of the kit. These canbe fitted within the module casing, or ideally in aconvenient site within the building, located betweenthe cold main and central heating return.Model shown: Grant Vortex Eco External Module6

SAP 2009Eco Efficiency . . .90.3 - 90.8% GrossGrant Vortex Eco External ModulesVTXOMECO1521 VTXOMECO2126 VTXOMECO2635Test SwitchControl PanelMains IsolatingSwitchBoilerThermostatOverheatThermostatOptional Sideor Rear Flue ExitsFrost Stat set to 5°C(factory fitted inside controlpanel - not shown)Optional PipeEntry PointsRiello RDBBurnerCondensate Trap(factory-fitted in rear of casing- not shown)Model shown:VTXOMECO1521(front view)Technical specifications - Boiler ConnectionsVortex EcoWall-MountedProgramer OptionsModelEco External Modules15-21 21-26 26-35Output kW 15 to 21 21 to 26 26 to 35Output Btu/h 50-70,000 70-90,000 90-120,000Flow connection 22mm 22mm 22mmOptional Grant ES Kit,Wall-mounted twin-channelprogrammerReturn connection 22mm 22mm 22mmCold water in (system kit) 15mm 15mm 15mmPressure relief (system kit) 15mm 15mm 15mmCondensate pipe21.5mm OD plastic overflow pipeNOTE 1: All boiler connections can be positioned to the left or right of the appliance.NOTE 2: Grant Vortex Eco External Modules are suitable for fully pumped systems only.Optional Grant RS Kit Wall-mountedprogrammable room thermostatT: 01380 736920 W: WWW.GRANTUK.COM7

Grant Vortex Eco Wall Hung RangeIntroductionGrant’s wall hung oil-fired boiler range comprises four internaland four external models.Available in outputs ranging from 12-21kW, in both sealedsystem and open-vented system variants, these new appliancesare pre plumbed and encompass Grant’s patented Vortexstainless steel heat exchanger and turbulator baffle system.All internal models require a separate flue kit (not suppliedwith the boiler) and are compatible with all Grant’s EZ-Fit lowlevel, high level and vertical flue systems, so now almost anyinstallation situation can be catered for.Dimensions (mm)Grant Vortex Eco Wall HungInternal 12-16, 16-21321.6580221112112Unique External ModulesAll Grant Vortex Eco External Wall Hung models come completewith a factory fitted flue, high quality external powder coatedpaint finish, built-in boiler frost protection, mains isolating switchand a test switch.840Sealed system modelsGrant Vortex Eco Wall Hung boilers are also available in sealedsystem versions. These include a factory fitted expansionvessel, filling loop, pressure gauge, automatic air vent, pressurerelief valve and circulating pump, enabling boilers to be installedwithout the need for a feed and expansiontank in the loft.321.Grant Vortex Eco Wall HungExternal 12-16, 16-21634.4621832.5836.536.6832.5349.86216298

Grant Vortex Pro Kitchen/Utility RangeIntroductionThe Grant Vortex Pro Kitchen/Utility range has been upgraded toenable a number of new programmer options to be used with theappliance. A plug-in programmer (Product code: EPKIT) can beinstalled within the fascia, or alternatively, the receiver for Grant’snew wireless RFT Kit (Product code: RFTKIT) can be locatedwithin the knockout and the programmer sited conveniently withinthe building.The boilers have very high SAP 2009 gross seasonal efficienciesof between 90.7 - 93.3% and feature the ‘award winning’ uniqueGrant Vortex stainless steel condensing heat exchanger, andturbulator baffle system. The 15-21 utility model has beendesigned to fit within a kitchen unit and, due to its reduced width,can be used as a direct replacement for most older oil-firedboilers.There are nine models within the range covering outputs from15-70kW (50,000-240,000 Btu/h), all of which feature Grant’s newinternal condensate trap.Sealed System modelsSealed System variants of the Kitchen/Utility range are available inoutputs of 15-26kW, 26-36kW and 36-46kW. Larger models above46kW can also be converted to sealed system operation.Dimensions (mm)Grant Vortex Pro 15-21 kitchen/utilityL/H FLOWL/H RETURNGrant Vortex Pro 15-26 kitchen/utilityand system860712 83594210TRAP EXTERNALDRAIN EXITLEFT HANDTRAP INTERNALDRAIN EXITLEFT HANDHIGH LEVELTRAP INTERNALDRAIN EXITLEFT HANDLOW LEVEL410Grant Vortex Pro 26-36 and 36-46kitchen/utility and system1762428191778886ø31603 605TRAP EXTERNALDRAIN EXITLEFT HANDTRAP INTERNAL DRAINEXIT LEFT HANDHIGH LEVELTRAP INTERNAL DRAINEXIT LEFT HANDLOW LEVEL445566ø3160603616119TRAP EXTERNALDRAIN EXITLEFT HAND719556TRAP INTERNALDRAIN EXITLEFT HANDHIGH LEVELTRAP INTERNALDRAIN EXITLEFT HANDLOW LEVEL8286441Grant Vortex Pro 46-58 and 58-70kitchen/utility40252107867811024 17083173126370Ø44TRAP INTERNALDRAIN EXITLEFT HANDLOW LEVELTRAP EXTERNALDRAIN EXITLEFT HANDTRAP INTERNALDRAIN EXITLEFT HANDHIGH LEVEL10162010

SAP 2009Pro Efficiency . . .90.7 - 93.3% GrossGrant Vortex Pro External ModulesVTXOM1521 VTXOM1526 VTXOM2636 VTXOM3646VTXOM4658VTXOM5870Control PanelTest SwitchMains IsolatingSwitchBoiler ThermostatOverheat ThermostatOptional Side Flue ExitFrost Stat set to 5°C(factory fitted insidecontrol panel)Optional Pipe Entry PointsCondensate Trap(factory-fitted in rearof casing - not shown)Riello RDBBurnerModel shownVTXOM1526(front view)Technical specifications - Boiler ConnectionsVortex Pro ExternalProgramer OptionsModelPro External Modules15-21 15-26 26-36 36-46 46-58 58-70Output kW 15 to 21 15 to 26 26 to 36 36 to 46 46 to 58 58 to 70Output Btu/h 50-70,000 50-90,000 90-123,000 123-157,000 157-200,000 200-240,000Flow connection 22mm 22mm 28mm 28mm 1 1 / 4” BSP 1 1 / 4” BSPReturn connection 22mm 22mm 28mm 28mm 1 1 / 4” BSP 1 1 / 4” BSPCold water in (system kit) 15mm 15mm 15mm 15mm 15mm 15mmPressure relief (system kit) 15mm 15mm 15mm 15mm 15mm 15mmCondensate pipe21.5mm OD plastic overflow pipeNOTE 1: All boiler connections can be positioned to the left or right of the appliance.NOTE 2: Grant Vortex Condensing Modules are suitable for fully pumped systems only.Optional Grant RFT Kit.Wireless Twin-ChannelProgrammable ThermostatNOTE: It is also possible to control GrantVortex Pro External modules with theoptional twin channel programmer(ES Kit - see page 5)T: 01380 736920 W: WWW.GRANTUK.COM13

SAP 2009Pro Efficiency . . .89.5 - 91.6% GrossGrant Vortex Pro Internal Combi ModelsGrant Vortex Pro External Combi ModulesVTXCOMBI21VTXCOMBI26VTXOMCOMBI21VTXOMCOMBI26VTXCOMBI36VTXOMCOMBI36Optional TimerKit PositionHeating and hotwater selectorswitchesBoiler ON/OFFSwitchElectronic BoilerThermostatNeon DiagnosticIndicatorsSystem PressureGaugeOverheatthermostatExpansionVessel (Sizevaries withmodel)Nickel platedpipes35 Plate HeatExchangerElectricalIsolationPlugServiceSwitchNeon DiagnosticIndicatorsBoiler ON/OFFSwitchElectronic boilerthermostatOverheatthermostatBuilt-insystempressuregaugeInternalCondensatetrap (factory-fittedin rear of casing)not shownExpansion Vessel(Size varies withmodel)InternalCondensatetrap (withexternaloption)Model shownVTXCOMBI26 (front view)Front ServiceAccessThermostaticblending valvePump (hotwater circuit)Flexible fillingloopPrimary StoreDrain CockRiello RDBburnerNickel platedpipesThermostaticblending valveFlexible fillingloopPump (hotwater circuit)Riello RDBburnerModel shownVTXOMCOMBI26 (front view)Technical specifications - Boiler ConnectionsModelPro InternalCombi ModelsPro ExternalCombi Models21 26 36 21 26 36Vortex Pro CombiTimer OptionsOutput kW 21 26 36 21 26 36Output Btu/h 70,000 90,000 123,000 70,000 90,000 123,000Flow connection 22mm 22mm 28mm 22mm 22mm 28mmOptional Grant MT KitSingle-Channel Mechanical TimerReturn connection 22mm 22mm 28mm 22mm 22mm 28mmCold water in 15mm 15mm 22mm 15mm 15mm 22mmHot water out 15mm 15mm 22mm 15mm 15mm 22mmPressure relief 15mm 15mm 15mm 15mm 15mm 15mmCondensate pipe21.5mm OD plastic overflow pipeNOTE 1: All boiler connections can be positioned to the left or right of the appliance.NOTE 2: Grant Vortex Pro Internal and External Condensing Combis are suitable for fully pumped systems only.Optional Grant RFT Kit. Wireless Twin-ChannelProgrammable ThermostatNOTE: It is also possible to control Grant Vortex ProCombi’s with the optional twin channel programmer(ES Kit - see page 5)15T: 01380 736920 W: WWW.GRANTUK.COM 1515

Grant Vortex Pro Boiler House RangeIntroductionThe new Grant Vortex Pro Boiler House models comeas a blue cased unit with an externally mounted RielloRDB burner and thermostat. These boilers are ideal forlocations that are difficult to access like cellars or plantrooms, where a white cased utility version is not alwaysthe best solution.There are four models available with outputs of 26-36kW,36-46kW, 46-58kW and 58-70kW. All have high SAP 2009seasonal efficiencies between 90.7% and 93.3%.The boilers encompass the same unique stainless steelheat exchangers used in other Vortex boilers together withGrant’s exclusive turbulator baffle system, which providesultra-high efficiency and low running costs.Grant Vortex Pro Boiler House models are compatible withall of Grant’s EZ-Fit flue options and are flued in exactlythe same way as Kitchen/Utility models.Dimensions (mm)Grant Vortex Pro Boiler House 26-36 and 36-46460 600191StatFlow705560Grant Vortex Pro Boiler House 46-58 and 58-70540 868285StatFlow1022835Model Shown: Grant Vortex Pro 46-58kWBoiler House Model Installed in a cellar16

SAP 2009Pro Efficiency . . .90.7 - 93.3% GrossGrant Vortex Pro Boiler House ModelsVTXBH2636 VTXBH3646 VTXBH4658 VTXBH5870Top FlueExitHeating Return(under blankingplate)Dual Stat(not shown)- comes fittedon 46-58 and58-70 modelsCondensateTrap(Not shown)Heating Flow(under blankingplate)RielloRDBBurnerModel shown:VTXBH2636(front view)Vortex Pro Boiler HouseProgramer OptionsTechnical specifications - Boiler ConnectionsBoiler House ModelsModel26-36 36-46 46-58 58-70Output kW 26 to 36 36 to 46 46 to 58 58 to 70Optional Grant EP Kit.Electronic Twin-ChannelPlug-in ProgrammerOutput Btu/h 90-123,000 123-157,000 157-200,000 200-240,000Flow connection 28mm 28mm 11/4” BSP 11/4” BSPReturn connection 28mm 28mm 11/4” BSP 11/4” BSPCold water in (system kit) n/a n/a n/a n/aPressure relief (system kit) n/a n/a n/a n/aCondensate pipe21.5mm OD plastic overflow pipeNOTE 1: The boiler flow and return connections exit the casing on the left or right hand side.NOTE 2: Grant Vortex Pro Boiler House boilers are suitable for fully pumped systems only.Optional Grant RFT Kit.Wireless Twin-ChannelProgrammable ThermostatNOTE: It is also possible to control Grant VortexBoiler House models with the optional twinchannel programmer (ES Kit - see page 5)T: 01380 736920 W: WWW.GRANTUK.COM17

Energy Management ControlsSave up to 15% on annual fuel billsImproving efficienciesFuel prices are increasing year on year and this is having a major effect ondomestic heating costs. Although the price of fuel cannot be changed, stepscan be taken to reduce the amount used.How most heating systems workWhen air temperatures in the house fall below the setting on the room thermostat, a signal is sent for the boiler to fire andwarm the house. Unfortunately a disadvantage of this simple arrangement is that the thermostat only tells the boiler to turnon or off when the house is too cold or too hot, respectively. Some systems are even installed without a room thermostat(boiler interlock), relying solely on individual thermostatic radiator valves.In either case no consideration is given to maintaining the correct flow and return temperatures that enable a boiler tooperate in condensing mode; or to any external temperature fluctuations. Looking at it another way, how many miles pergallon would a car get if the only method of controlling speed was to accelerate until it is going too fast and then apply thebrakes? That is exactly how most heating systems work.How heating systems should workBoiler flow and return temperatures should be monitored andcontrolled, and the system must be able to react promptly tointernal and external air temperature changes. Using the caranalogy, an accelerator pedal is adjusted carefully to maintaina comfortable driving speed and good fuel economy. Why notthe same with a domestic heating system? By installing a GrantEnergy Management Control, the water temperature in theheating system is constantly measured to maintain comfort andimprove efficiency.Thermostat onlyThe Grant Efficiency OptimiserThe Grant Efficiency Optimiser (GEO360) is a smart weathercompensating control unit comprising of a controller, two pipethermostats together with an internal and external air sensor,coupled to a 4-Port mixing valve.With the information retrievedthrough the outdoor air sensor (fitted on a north facing wall)the unit can adjust system water temperature to match a heatoutput closer to the needs of the home. In fact, the system willadapt before it even feels too cold or too hot. In periods of warmweather the GEO360 will automatically shut the system downuntil it is needed again. Flow and return temperatures can bepre-set on the control module enabling condensing boilers tooperate in condensing mode more often, thereby saving fueland making the system more environmentally friendly.There are two models available. The GEO360/28 has 28mmcompression fittings and is suitable for systems up to 36kW (123,000Btu/h). If required, a reducing set (28mm reducing to 22mm) shouldbe used for systems under 21kW (70,000 Btu/h). The GEO360/35has 35mm compression fittings and is suitable for systems from36kW to 70kW (123,000 - 240,000 Btu/h).With a GEO36018

GEO360 PerformanceIntelligent weather compensationThe GEO360 monitors weather conditions throughout the year regardless of the season. Without the control unit, a heating systemdoes not know if it is a cool autumn night or the coldest winter day. Therefore it works as if it was always the coldest day of the yearand heats the water to a maximum temperature. The following diagrams show how the GEO360 adapts a heating system to thechanging seasons, thus saving energy.AutumnWinterRoom thermostat calls for heat ona cool Autumn night.Room thermostat calls for heat ona cold Winter day.A signal is sent for the control to turnthe boiler on and warm the house.A signal is sent for the control to turnthe boiler on and warm the house.Control uses the outdoor tempeatureto calculate the water temperaturerequired by the system.Control uses the outdoor tempeatureto calculate the water temperaturerequired. This will be higher in colderweather.Control operates the boiler to allowthe system to heat up to thattemperature (using less fuel).Control operates the boiler tomaximum and modulates the heatingsystem to the desired tempearture.How much fuel will I save?Weather compensating controls are not a new concept.Most are generally found in commercial applications, suchas office buildings, factories, etc.The GEO360 has been developed to make this technologyaffordable for the domestic market. Savings depend onmany factors, however when fitted on a standard system,a fuel reduction in the region of 10-15% per annum shouldbe achievable, and in many cases this will be higher, sopayback would typically be within three years!Pipework layout example0Running costs per £200 400 600 800 1000Oil-firedCondensingwith GEO360Oil-firedCondensingAVERAGE£610£695*Figures reproduced with permission from Sutherland Tables, showing a5-year average running cost for a 3-bed house in the UK up until May 08.NOTE: This is only a concept drawing, not an engineered drawing. It isnot intended to describe the complete system, nor any particular system.It is up to the system designer to determine the necessary componentsand configuration of the particular system being designed, to ensurecompliance with building and safety code requirements.T: 01380 736920 W: WWW.GRANTUK.COM19

General InformationInstallation and commissioningInstallation must comply with the current British Standards andThe Building Regulations. Comprehensive technical informationcan be found in the installation manual, supplied with everyboiler.As with all oil-fired appliances, Grant Vortex CondensingBoilers require commissioning at the time of installation.This simple process ensures that the boiler is workingat peak efficiency which, in turn, will result in lower runningcosts and long term reliability.PlumingCondensing boilers operate at extremely high efficiency levels,producing cool flue gas temperatures, resulting in a ‘plume’ ofvapour being visible at the flue terminal. This plume (steam) is anormal condition of condensing boiler operation and indicatesthat the appliance is working efficiently.Low level balanced, high level, or vertical flue kits are available,which moves the plume to a higher level. Alternatively, it ispossible to convert an existing low level balanced flue to anexternal high level or vertical arrangement using Grant’s PlumeDiverter.GuaranteesThe unique heat exchanger on Grant Vortex Condensing Boilersis covered by a 5-year guarantee. All other component parts ofthe boiler are guaranteed for 2 years from the date of purchase(excluding consumable items), subject to being installed inaccordance with the manufacturers instructions. There are alsooptional annual, or 3-year extended warranty schemes available.On completion of the installation all Grant Vortex CondensingBoilers must be commissioned and the guarantee registrationform completed online.After sales serviceFor peace of mind, all Grant central heating boilers are backedby a national network of independent service engineers. In theunlikely event of a problem occurring, your installer shouldtelephone our Customer Service Department on: 01380 736920Standard Assessment Procedure (SAP)SEDBUK was developed by the Government alongside boilermanufacturers, under their ‘Energy Efficiency Best PracticeProgramme’. It was designed as a fair basis for comparisons ofboiler energy performance when installed in a typical domesticsituation in the UK.To determine boiler efficiencies, a ‘Standard AssessmentProcedure’ more commonly known as SAP, is used. SAP is theGovernment’s standard method for energy rating. SAP ratingsenable the comparison of energy efficiencies and demonstrate thelikely effect of improvements to a property in terms of energy use.Since SEDBUK was introduced in 1999, it has undergone manychanges, the most recent being the move from SAP 2005 to SAP2009. The changes focus on improving the accuracy of the waythe efficiencies are worked out.SAP 2009 incorporates a key revision in the assumed carbonemissions per kWh of oil used by the boiler. It may appear that theefficiencies of boilers have reduced with SAP 2009, but it isimportant to understand that the new methodology gives a morerealistic estimate of the average annual boiler efficiency wheninstalled in typical conditions, based on evidence from recentindependent testing and field trials.FuelThe burner on all Grant Vortex boilers is supplied factory set at thestated output for use on standard grade kerosene - Class C2.Grant Vortex Condensing Boilers manufactured from May 2011onwards, however, will have a new ‘bio compatible’ burner fittedwhich is also suitable for biokerosene at a 30% blend, known asB30.To use B30 fuel, it will be necessary to change the oil feed line andensure that other components used during installation e.g oil tank,etc. are suitable. Grant Vortex Condensing Boilers must not beused with Class D gas oil.This leaflet is accurate at the time of printing but as Grant UK has a policy of continual improvement itmay be superseded. We reserve the right to amend specifications without prior notice. The statutoryrights of the consumer are not affected.All products manufactured under I.S. EN ISO 9001 and ISO 14001.THE GRANT ‘EZ-FIT FLUE’ SYSTEM is a Trade Mark of Grant Engineering Limited.®Grant Aerona, Grant Spira, Grant Vecta, Grant Vortex, Grant Solar, Grant Aurora, Grant Sahara,Grant CombiSOL, Grant WinterSOL, Grant MonoWave, Grant DuoWave, Grant ThermaWave,Euroflame and Multi Pass are registered trade marks of Grant Engineering Limited. The contents ofthis leaflet are fully protected by copyright and nothing may be reproduced without permission fromGrant UK.GRANT ENGINEERING (UK) LTDHOPTON HOUSE, HOPTON INDUSTRIAL ESTATE,DEVIZES, WILTSHIRE, SN10 2EUT: 01380 736920 F: 01380 736991E: SALES@GRANTUK.COM W: WWW.GRANTUK.COMGRANTEZ FIT FLUE SYSTEMVCB 11/11 UK