G1 is Grant UK's Installer Scheme. Heating engineers can become a G1 accredited installer in one or more of Grant’s product ranges, but each requires a specific set of requirements to be met before being accredited in that technology. For further information, please visit the G1 Scheme pages on our website or contact the G1 Team by emailing: G1@grantuk.com.
Becoming a heating engineer requires in depth training, involving industry qualifications and product training. OFTEC, Gasafe and MCS are just three heating engineer qualifications that are widely recognised in the sector. Completing manufacturer’s product training is also very important, especially when you are intending to install an unfamiliar product like an air source heat pump for example. Grant UK’s Training Academy provide training and assessment for heating professionals include OFTEC qualifications, LOGIC training and product courses.
Our brochures and manuals are available to download as PDFs on our website (click here). If you require hard copies, please email info@grantuk.com. Also available for mobiles and tablets is the Grant TechBox app, where all of Grant's current and historic product manuals are freely accessible. This app works in both online and offline mode (for times when there is no internet signal), so you’re never without the information you need.
We consider and respond to all complaints and issues, no matter how they are raised or what they refer to. We take every opportunity to resolve complaints at the first point of contact where possible. To make a complaint, please use the contact forms on this site, or alternatively email: info@grantuk.com
The G1 Portal (www.g1.grantuk.com) is an online platform which is exclusively accessible to G1 Scheme members. Via the Portal, G1 Installers can register their installations, access useful downloads and order marketing materials and branded items via the G1 Shop.
G1 Click is a product registration app exclusively accessible to G1 Scheme members. This app syncs with the Portal so that G1 installers can be sure that both platforms have their latest account information. Compatible with iOS and Android devices, G1 Click is a handy tool for Scheme members to have on their phones.
In simple terms, a warranty is like an insurance policy in which parts of the product bought can be insured through repair or replacement. It may also be seen as a written guarantee where a company provides assurance to another party of specific facts, conditions and remedy. This means that if a fact is not met by the product or service, it allows the consumer to receive a remedy, in most cases, free repair or product replacement. However, a warranty can and may have an expiration date and may not be applicable to all products and services.
Guarantee on the other hand, is a legal term that is of higher import than warranty. It is generally a promise or an assurance that attests to the quality and/or durability of a product or service. It may also be seen as a pledge where a product will perform in a specified manner. A guarantee is usually free and is legally binding. Also, it will take effect whether or not you have a warranty. In other words, a guarantee is separate from a warranty that’s provided by a service provider, manufacturer or other third parties.
Through the G-CERT Scheme, Grant UK certified renewable installations for MCS accreditation on behalf of the installer. Please note, the G-Cert Scheme is now closed to new Sub-Contractor applications and closed to new job requests.
The award winning Vortex boiler was launched in 2002. In the subsequent years that followed there was a customer demand for a competitively priced ‘A’ rated boiler, so the R&D Team at Grant devised the Eco range to meet this growing demand. The Vortex Pro has a larger heat exchanger area and more case insulation which gives it a slightly higher efficiency than the equivalent Eco model.
Yes. As 15th June 2022, if you are installing a new gas or oil boiler, you will be required to carry out a full room by room heat loss calculation before completing the installation. The aim of this process is to encourage correctly sized heating systems to be installed as the Part L Building Regulations state that systems should not be significantly oversized.
Read MoreRegarding an “app” or WiFi controlled systems. As with most of these systems we advise to contact the manufacturer to ascertain whether the “base station” can generate a 240v signal. Our boilers require this signal, from the room ‘stat via a zone valve, in order to energise. If your unit can produce this signal voltage then, in theory, the boiler should function.
If the system has an “open therm” configuration then this is only for modulating boilers, Grant boilers are range-rated and do not modulate. If the configuration can be changed to an “on/off” format then this, again in theory, should work
As in the summer season, when heating is not required, simply switch your controller’s heating demand regulator to the “off” position so the boiler will only energise for DHW demand.
With Grant external units, a frost thermostat is already factory fitted to protect the boiler.
However, should you install an internal boiler in a remote setting i.e. a garage etc, then a frost ‘stat MUST be fitted. In both cases a boiler return ‘stat would be a good idea to install. This controls the return water temperature and turns off the boiler earlier than the normal ‘stats which sense air temperature. This will reduce oil wastage and energy.
Yes, two or more can be linked using a header system via a common flow and return. On the return pipes to the boilers a Non-Return Valve must be fitted to prevent any back feed. Two to four boilers can be controlled by the Grant264 Boiler Sequencer.
A Grant Boiler cannot be installed directly onto a one pipe system as the return water temperature will be too low, this will cause internal condensing which will corrode the primary heat-exchanger. This return water must be above 40°C
The only way to establish a boiler into this type of system is by installing a plate heat-exchanger between boiler and pipework or supplying the circuit through a low-loss header arrangement.
This ensures the boilers are separated and will have “back-end” protection and, more importantly, the installation will be covered by the guarantee.
It is mandatory to power flush a system in order to fulfil Grant UK's guarantee.
However, if the system is old a power flush may cause undue pressure on the aging pipework, radiators valves etc. In these cases, the circuits should be chemically cleaned to assure the components are free of debris and system scale etc. and will not affect the new boiler.
All Grant Vortex floor standing oil boilers are biofuel compatible (depending on type of biofuel and % blend, for example: HVO or FAME). Biofuels are a renewable energy source, created from organic matter or waste. It will likely play an important role in reducing carbon dioxide emissions in the future. As biofuels emit less carbon dioxide than conventional fuels they can be blended with existing fuels, or used as 100% sustainable fuels, as an effective way of lowering carbon emissions.
Read MoreTo read more about the complete range of flue systems available in the Grant EZ-FIT Flue range, please visit www.grantuk.com/professional/products/flues.
During winter months when it is particularly cold, condensation can form and freeze on the finned evaporator coil of the unit. It is a normal occurrence and the heat pump is designed to cope with this. The control system will detect when the coil has iced up and will automatically enter a ‘defrost’ cycle. During this short ‘defrost’ period the fan will stop and the heat pump will cease supplying heat to the heating system in order to melt the ice. On completion the fan and heat pump will automatically restart and resume supplying heat to the heating system. This will not adversely affect the building temperature.
Yes, all models within the Grant Aerona³ range are MCS approved.
All of the Grant Aerona³ R32 air source heat pumps have been approved by CEN KEYMARK, an independent European certification mark for all heat pumps, combination heat pumps and hot water heaters.
Read MoreNormal domestic heating controls, such as a 2-channel programmer, room thermostat and cylinder thermostat are suitable for use with Grant air source heat pumps.
Read MoreYes, air source heat pumps can be installed with radiators but the radiators must be correctly sized for the lower water flow temperature. It is important that the system is designed correctly and you can speak to your installer or a member of our Design Team to discuss this further.
Read MoreWhen installing an air source heat pump, a hot water cylinder that is compatible with heat pumps must be selected and, more often than not, an existing cylinder will not be suitable.
Read MoreGrant’s latest generation of air source heat pumps uses R32 refrigerant which has a GWP which is considerably lower than other typical heat pump refrigerants such as R410. In addition to having a lower GWP figure of 675, R32 is a single-component refrigerant which means it has no temperature glide. Refrigerant blends that have two or more components exhibit temperature glide but as R32 only has one molecule in its formation, its saturated liquid and vapor temperatures are the same. By removing the risk for the refrigerant to suffer from glide, the system can recharge and recycle with greater ease, making it more efficient.
Blygold anti-corrosion treatment is designed to preserve the heat pump against the sea air and prevent unnecessary energy consumption or product failure due to corrosion. Grant offer Blygold anti-corrosion treatment for all of their Aerona³ R32 heat pump models to help preserve and maintain heat pumps installed in the vicinity of the sea. For further information, speak to our Sales Team on 01380 736920.
Read MoreGrant air source heat pumps feature an in-built 'Defrost' function which automatically operates to assist the heat pump when external temperatures drop below 0˚C. In brief, the defrost cycle reverses the heat pump's operation to direct hot refrigerant vapour back into the ice covered evaporator causing any ice to melt.
Read MoreUse a dedicated power supply with a correctly sized circuit breaker. The final power supply connection must be made from a weatherproof lockable isolator located outside the building. The cable should be either armoured or run in a flexible conduit between the isolator and heat pump.
Unit Power Supply Cable (mm²) Breaker Type and Capacity
HPID6R32 4.0 - 2.5 16Amp Class C
HPID10R32 4.0 - 2.5 20Amp Class C
HPID13R32 6.0 - 4.0 32Amp Class C
HPID17R32 6.0 - 4.0 32Amp Class C
Should the installer wish to extend the control cable from controller to unit, then they can use standard CAT 5 cable.
The Grant Combined Volumiser/Low Loss Header is designed for installation with the Aerona³ air source heat pump, and it serves as a volumiser and hydraulic separator.
Read MoreThe Aerona³ 6kW (HPID6R32) and 10kW (HPID10R32) air source heat pumps are Connect & Notify approved which means they can be installed and connected to the Grid without prior approval from the DNO which makes their installation even more straightforward.
The control system on the hybrid unit monitors the ambient (outside) air temperature and allows only the heat pump to operate when the air temperature is high enough for it to meet the heat demand of the building on its own. At lower ambient air temperatures the boiler will operate alongside the heat pump, providing a boost to the flow temperature. When the ambient air temperature falls lower still, the boiler is operated at its full output at a higher flow temperature to enable the hybrid unit to meet the higher heating demand of the building.
Read MoreHeating system radiators in existing properties are usually sized using the higher water flow temperatures produced from a boiler and so, to meet the same heat demand using the lower flow temperatures produced by a heat pump, the radiators would normally need to be increased in size. Using a hybrid unit combines the higher flow temperatures produced by a boiler, with the efficient operation of a heat pump, to meet the buildings heat demand throughout the year.
When the weather is warmer, i.e. in the spring and autumn, the heat pump works independently and the existing radiators can meet the heat demand with the lower flow temperature. This allows the very efficient use of electrical energy to drive the heat pump for large periods of the heating season. When the weather gets colder, the boiler operates to provide the additional energy required negating the need to increase radiator sizes.
The VortexAir is designed to be installed outdoors, i.e. both the boiler and heat pump are located next to each other outside the building. However, it is also possible for the boiler to be installed internally with the heat pump still outside. Full details for both types of installation are given in the installation instructions supplied with the unit.
No. The boiler can be installed and, if necessary, operated as a stand-alone unit for an indefinite period until the heat pump can be installed and connected to it. This is particularly useful when an existing boiler has to be replaced in an emergency due to a breakdown. The installation of the heat pump can follow at a later date when convenient.
Read MoreNo. The blue flame burner and boiler is serviced in exactly the same way as any other boiler from the award winning Grant high efficiency Vortex condensing range. The boiler is accessed via a removable door on the right hand end of the casing and most of the electrical servicing can be easily done from the front of the appliance.
No. As not all installations will require a heat meter and electricity meter, the Grant VortexAir Hybrid is supplied without any meters fitted. However, in accordance with MCS metering requirements, the Grant VortexAir Hybrid is supplied ‘meter ready’ to allow both the heat meter and electricity meter to be easily fitted if required. The heat meter and electricity meter are available as accessories from Grant.
A Solar PV system uses panels (usually called ‘modules’) that generate electricity in the presence of sunlight. The amount of electricity produced depends on the intensity of the sunlight. Solar thermal, on the other hand, uses sunlight to heat a fluid. In the case of Grant solar collectors, it heats a glycol/water solution within the collector. This heated fluid is then circulated from the collector to a cylinder where the heat is transferred to produce hot water.
Read MoreIn most instances, the installation of a solar thermal system does not require planning permission.
Read MoreMany people believe that solar collectors only work in the summer, however this type of free energy is available throughout the year. From May to September, solar thermal could produce 100% of the energy required for heating your domestic water. Grant collectors operate not just with direct sunlight, but also diffused sunlight, so they even work on cloudy days.
For installations in the UK, solar thermal collectors will perform best when facing due south at an angle of between 30 - 45°. However, collectors facing south west or south east will perform almost as well. Failing that a collectors facing due west will perform better than those facing due east. North facing solar thermal collectors are not usually used.
No. Grant Solar Thermal systems require only basic maintenance in order to ensure that they continue to give trouble free operation.
Read MoreA Grant solar thermal system requires a cylinder with a solar coil. In many cases this will be a ‘twin coil’ cylinder with both a boiler coil and a solar coil. This may well mean that your existing hot water cylinder will have to be replaced by a suitably sized twin coil cylinder to maximise the performance of your solar thermal system.
Underfloor heating is not restricted to new build properties, it can be also be installed as a retrofit project into many older properties.
Read MoreNo. UFH can be installed both upstairs and downstairs in a property. Please read more about underfloor heating specifications here.
Grant's underfloor heating systems include, Uflex and Uflex MINI. With a drying time of thirty days, the Uflex underfloor system is best suited to the new build and renovation market, this is so the underfloor system can be fitted as part of the floor construction process. Uflex MINI however has a drying time of 3 days. It is suitable for both new builds, as well as retrofits and renovations, when an underfloor heating system is to be fitted in a property with a floor construction already in place. At just 15mm in height, this underfloor system can be installed incredibly quickly and with minimal disruption to a property’s existing floor and door arrangements.
Underfloor heating is suitable for gas, oil, and LPG boilers as well as heat pumps and biomass boilers. For more information, speak to our Renewables Team.
Radiators use air circulation to emit heat into a room whereas underfloor heating warms a room when the hot air rises from the floor. Radiators do therefore work differently compared to an underfloor heating system.
Read MoreNo. The Uflex MINI system is specifically designed to suit retrofits and renovations, when an underfloor heating system is to be fitted in a property with a floor construction already in place. At just 15mm in height, this underfloor system can be installed with minimal disruption to existing floor and door arrangements.
Not all types of floor finishes are compatible with underfloor heating systems so it is important to research suitable floor coverings which will allow the heat from the underfloor heating system to be transferred into a room.
Read MoreYes, data suggests that underfloor heating can be 25% cheaper to run than radiators when used in conjunction with a condensing boiler and up to 40% cheaper to run when used with a heat pump (EuRay 2005.)
Overboarding involves the fitting of an overlay or base layer in between the screed and the floor finish. Some types of underfloor systems, such as electric UFH, require a form of overboarding to be fitted as standard. However, Grant’s Uflex underfloor system does not need overboarding which allows installers to lay the final floor covering directly on top of the dry screed.
The manifold is the system hub for the underfloor. The pipes are connected to it at the installation stage and it then controls the distribution of the water from the heating system's source (boiler/heat pump) throughout the underfloor system. It is at the manifold that the control of the flow to each individual zone or room is achieved.
The manifold should be located in a central point where the pipework is most evenly distributed.
Grant's underfloor heating systems operate at their most efficient when they are not frequently switched off and on. The floor screed takes time to heat up, but once up to temperature it only requires a small amount of heat to maintain this condition. Switching the system off and on, results in the floor losing temperature, requiring more heat input to reach temperature again.
Read MoreUpon commissioning a Grant Uflex screeded underfloor heating system connected to a Grant Aerona³ R32 Heat Pump, the initial temperature increase rate of the system should be gradual, so to avoid a situation where the heat pump ices up as a result of trying to heat up the fabric of the underfloor system too quickly.
This can be achieved by first ensuring that the screed has been allowed to dry and cure normally (the underfloor heating must not be used to speed up this process) before initial heating. The initial temperature increase rate of the underfloor system can be controlled to be gradual by setting the thermostatic mixing valve to setting 3 and leaving the system to run for two weeks upon initial start-up. Once the underfloor system has reached operating temperature, the system can be set to operate to the householder’s requirements.
The Energy Saving Trust endorsed energy efficient products that met industry agreed standards for energy performance and for over 15 years, all Grant oil boilers were endorsed by the Energy Saving Trust. Please be advised that the Energy Saving Trust's product endorsement scheme closed on 1st March 2022.
The Microgeneration Certification Scheme is a government driven scheme to promote renewable technologies. It is an internationally recognised quality assurance scheme which demonstrates the quality and reliability of Approved Products by satisfying rigorous and tested standards. MCS is linked to the Governments’s finance schemes and incentives. If you wish to take advantage of these schemes, an MCS approved product must be used. For further information visit https://mcscertified.com/
The link for the Grant eLearning Academy is www.grantelearning.com.
In order to access the eLearning Academy and the online courses, users must first create an account. This is a really quick process that takes less than five minutes to complete. You will need an enrolment key (please use GUKWEB0820), your company details, and you will also need to confirm your password for your account. Once you have successfully set up your account, you can start viewing the courses.
During the sign-up process, you will be prompted to enter an enrolment key which is a unique code. You will need this to hand when creating your account so please use enrolment key GUKWEB0820.
The eLearning Academy is open to heating engineers, installers and other professionals within the heating sector of all abilities. The courses vary in content so candidates can enrol onto and complete the training which best suits their requirements.
Air Source Heat Pump and Hybrid product training are currently available on the eLearning Academy, covering topics from system design and product sizing through to heat emitter sizing and much more. Grant UK’s Training Team will be continuously adding to the content on the eLearning Academy so candidates can return to the platform at any time to refresh their learning or expand it further into new areas.
There are a variety of courses available on the eLearning Academy including on-demand courses which can be completed at anytime as well as instructor-led courses which are real-time courses hosted by one of Grant UK’s Trainers.
The instructor-led courses are full one or two day courses (depending on the course level selected) and candidates are required to log on between the hours of 8.30am through to 5pm (approximately) on the day(s) of their course.
On-demand courses are split into modules and sessions which vary in running time – the Advance Installer courses are approximately 7½ hours in duration (excluding assessment) and the Installer courses are approximately 5½ hours in duration (excluding assessment). On-demand courses can be completed in multiple sittings and candidates can pause and resume courses at any time.
There is a charge for the instructor-led courses and some of the on-demand courses so please log onto the eLearning Academy for further information about the prices. Free training content is also accessible on the eLearning Academy with a selection of courses available for candidates to complete which do not have a charge.
There is no waiting list for the on-demand courses as candidates can self-enrol and start these courses straightaway. With instructor-led courses, these are subject to availability so candidates must book their place in advance of the course.
To complete an on-demand course, simply log onto the eLearning Academy with your username/email and password, browse the course catalogue and select your chosen course. For free courses click ‘enrol’ and for chargeable courses click the price shown and follow the steps to checkout by credit/debit card. Once the transaction is complete, the purchased course will automatically show in the ‘My Courses’ section ready to be accessed.
Once you have logged onto the eLearning Academy and found your preferred ILC date(s), you need to book and pay for a space on the course by clicking on the button showing the price. Once your place on the ILC is confirmed, you simply need to log onto the eLearning Academy on the day(s) of your course, go to the ‘My Courses’ section where you will see your course and a Zoom Meeting link. You can also follow the Zoom Meeting link that is shared in your booking confirmation email too. We advise you to use a laptop rather than a mobile or tablet for the best experience during our ILC courses.
After completing a course on the Grant eLearning Academy, you will not receive a qualification but, depending on the level of training completed, the course could contribute towards G1 Installer Scheme accreditation or, with the CPD training for example, count towards personal development training hours.
Upon the successful completion of a course, the eLearning Academy will automatically issue a certificate as a record and evidence of the training completed. This certificate will not be emailed but it will be available to download in the ‘Transcripts’ section within your eLearning account.
Similar to the groups at courses held at Grant’s Training centres, each instructor-led course will be open to small numbers to enhance the learning experience for all. Up to 10 candidates can sit on an instructor-led course.
No, only some of the courses involve an assessment. For example, the Grant Air Source Heat Pump Installer training courses do require candidates to successfully complete the online assessment. If a course does involve an assessment, this is clearly mentioned in the course description prior to enrolment.
In order to participate in the online courses, candidates will need access to a computer or tablet with an internet connection. High speed broadband or sufficient 4G/5G mobile broadband is highly recommended for an optimal learning experience. For instructor-led courses (ILC), candidates will also need a working webcam, working speakers or headphones, and a working microphone.
Prior to an ILC, the Zoom app will need to be installed on your computer or mobile device – you can download Zoom and join a test meeting by following the link here: https://zoom.us/test. For users with a PC, Windows 10 is the compatible operating system for Zoom, and Firefox, Chrome and Microsoft Edge are compatible web browsers. For users with a Mac, OS X is the compatible operating system for Zoom, and Firefox, Chrome and Safari are compatible web browsers.
Should you experience a problem while using the eLearning Academy, please contact Grant UK’s Training Team on 01380 736920 or via email training@grantuk.com.
Grant UK no longer supply new biomass boilers and ancillary products to the mainland UK market (including England, Scotland, Wales, Isle of Man and Channel Islands).
Grant UK supply the full complement of spares to support Grant biomass installations in the field – please visit www.grantuk.com/spares for further details.
Technical support for all Grant biomass installations that are under warranty is available, subject to the Terms and Conditions of the product's guarantee and subject to the product being correctly registered with Grant UK. Please call 01380 736920 to speak to a member of Grant UK’s Technical Team with the biomass boiler’s serial number and installation address details to hand.
Grant UK no longer supply the Solo Fan Convector range to the mainland UK market (including England, Scotland, Wales, Isle of Man and Channel Islands).
Technical support for Grant Solo Fan Convector installations that are under warranty is available, subject to the Terms and Conditions of the product's guarantee and subject to the product being correctly registered with Grant UK. Please call 01380 736920 to speak to a member of Grant UK’s Technical Team with the installation address details to hand.