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Grant Vortex Pro 21 boiler

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Plumbproud rating

67.31%

Grant Vortex Pro 21 Combi Oil boiler

Considering lots of different factors such as price installed, manufacturer guarantees, energy efficiency, and the likely running cost, we’ve given this Grant Vortex Pro 21 Combi boiler a rating of 67.31% using our PlumbProud quality scoring system.

Expect this Grant Vortex Pro 21 Combi boiler to cost you £3,700 fully installed where there are no complications on the fit if you choose PlumbProud for this installation.

To receive a free quote on the Grant Vortex Pro 21 boiler, as well as professional advice on whether it will meet the needs of your home, simply enter your postcode in the quote box on this page, click here to email us, or call 01604 343053.


Installed price around

£3,700

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Grant Vortex Pro 21 Combi Oil boiler frequently asked questions

Is the Grant Vortex Pro 21 a system boiler, a combi boiler or a regular boiler?

The Grant Vortex Pro 21 is a combi boiler you may wish to consider if you want this particular type of boiler for your house or flat.

Traditionally, boilers needed one or more large tanks installed in your property to store their heated water or water that was to be heated later. These tanks were often too large to be practical for most homes so the combi boiler was introduced to Britain in the 1970s by manufacturers to help homeowners overcome this issue.

Instead of using tanks as storage, a combi boiler heats water on demand. It draws water from the mains and heats it instantly on demand before distributing it to wherever it is needed in a property, be it your taps or radiators.

Unfortunately, combi boilers have one main disadvantage for larger properties or larger households. Because they have a maximum volume of water that can be heated on demand at any given time, water pressure, volume and temperature will drop if, for example, someone is taking a shower and another person in your home wants to use a hot water tap at the same time.

Is a Grant Vortex Pro 21 combi boiler suitable for my house or flat?

To determine that, we need to consider the size of the boiler. Size doesn't mean how big it is - it means how big its "output" is.

The output rate of a boiler tells you how much power it has available to it for heating the water that comes out of your taps and warms your radiators. A higher output rate means that your boiler has more power at its disposal.

You need to make sure you select a boiler with the right output rate. That's because, if your output rate is too high, then your boiler will have more power than it needs but it will cost too much to run. If the output rate is too low, your water may often not be hot enough.

The Grant Vortex Pro 21 combi's output is 21 kW, so which types of property would this Grant Vortex Pro 21 Combi boiler be appropriate for?

An experienced Gas Safe engineer would be likely to recommend that this Grant Vortex Pro 21 Combi boiler is capable of providing heating and hot water to up to 10 radiators and one bathroom and would therefore be most suitable for smaller homes and apartments.

Flow rates are important when choosing a combi boiler as well as output rates.

A combi boiler's flow rate (measured in litres per minute) describes how much water it can instantly heat then distribute to the taps and radiators in your home - you will need to factor this into your decision on a new combi boiler. This Grant Vortex Pro 21 Combi boiler's flow rate is 15 L/m.

If you have a lot of radiators and bathrooms in your home and there's lots of demand within your household for hot water at the same time (like morning or evening showers and baths), you'll need a boiler with a high flow rate.

However, it's not quite that simple. If your local mains water pressure is low, you're not going to gain any benefit from choosing a combi boiler with a high flow rate because that higher flow rate doesn't mean it can draw more water from the mains pipes.
When our engineer comes out to quote you, they may recommend that you choose a heat only boiler or system boiler instead if your family's demand for hot water is higher than normal.


The size of the Grant Vortex Pro 21 in millimetres

The Grant Vortex Pro 21 is 945 mm tall, 658 mm wide, and 754 mm deep.

The Grant Vortex Pro 21 is an external floor-standing combi boiler intended for placement outside the home. In addition to providing you with more indoor space and reducing noise, this makes it easier for a service technician to access it if something goes wrong. The chance of carbon monoxide leaking into your home is also greatly reduced.

Floor-standing external boilers are housed in a weatherproof covering allowing them to be placed outside your home with only a minimal risk of rusting. Using external boilers is also safer because there will be less chance of oil leaks in your home which can cause significant internal damage and leave you with an oily odour that is hard to remove.

Is the Grant Vortex Pro 21 a non-condensing or condensing boiler?

The Grant Vortex Pro 21 is a condensing oil boiler - in fact, we recommend that you select this model or one of the latest condensing boilers on the market as the technology continues to improve over time.

Condensing boilers capture the heat still present in the flue exhaust gases and water vapour condensation created when the oil is burned and they recycle this back into the heating system to warm up the cold water re-entering the boiler from your radiators.

They're much more environmentally friendly and installing one results in much lower annual oil bills.

Is the Grant Vortex Pro 21 combi boiler an environmentally friendly choice?

How we heat our homes and the damage we might be doing to the environment as a result has become an important point of concern to many homeowners worried about climate change.

In the UK, central heating systems account for 14% of greenhouse gas production. Gas boilers in particular are responsible for emissions of dangerous nitrogen dioxide in British cities.

If you would like your next boiler to help in the fight against climate change, would the Grant Vortex Pro 21 combi be a suitable choice?

All boilers manufactured after April 2018 in the UK must be rated as an “A” on the SEDBUK grading system, subject to a minimum energy efficiency rating of 92% or above. Before that, the minimum rate was 88% - boilers with an energy efficiency of 88% or 89% were given a “B” rating. Boilers scoring 90% or more were given an "A" rating.

The energy efficiency rating for a boiler describes the amount of energy it uses and how much goes to waste in operation.

The Grant Vortex Pro 21 has an efficiency rating of 90.8% with a SEDBUK grade of "A".

The Energy Related Products (ERP) directive is Europe-wide legislation designed to reduce harmful gas emissions at all points of a product's life cycle - from the production process to its actual end use, right through to final disposal.

The Grant Vortex Pro 21 has a rating of "A" for heat and "A" for water.

If the Grant Vortex Pro 21 breaks down, will I be covered by the warranty?

The parts and labour warranty on the Grant Vortex Pro 21 covers all repair-related costs for 2 years while the heat exchange warranty covers you for [Heat Exchange Warranty] years.


Grant Vortex Pro 21 Oil Combi boiler specifications

Powered by GasOil
LocationExternal
Condensing?Yes
Efficiency rating90.8%
Band ratingA
LPG Compatible?No
P/L Warranty2 Years
Output in kW21 kW
Height945 mm
Width658 mm
Depth754 mm
MountingFloor
Flow rate15 L/m
ERP HeatA
ERP WaterA

The top 10 rated Oil Combi boilers

Using the Plumbproud scoring system, the current 10 ten Oil Combi boilers assessed using a number of important variables are as follows:

1Worcester Bosch Greenstar Heatslave II 12/1876.19%
2Worcester Bosch Greenstar Heatslave II 18/2576.12%
3Worcester Bosch Greenstar Heatslave II External 12/1875.95%
4Worcester Bosch Greenstar Heatslave II 25/3275.83%
5Worcester Bosch Greenstar Heatslave II External 25/3275.58%
6Grant Vortex Pro 2167.46%
7Grant Vortex Pro 2667.43%
8Grant Vortex Pro 26kW67.35%
9Grant Vortex Pro 2167.31%
10Grant Vortex Pro 2667.14%

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Grant Vortex Pro 21 boiler

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Grant Vortex Pro 21 Combi Oil boiler

  1. Home
  2. Grant Vortex Pro 21
Plumbproud rating for this boiler
67.31%

Our PlumbProud quality scoring system uses many different factors, such as price installed, manufacturer guarantees, energy efficiency and the likely cost of running, among others, to determine a boiler's value for money rating. This Grant Vortex Pro 21 Combi boiler scores 67.31%.

On most non-complicated installations, we would expect this Grant Vortex Pro 21 Combi boiler to cost £3,700 supplied and fully professionally installed.

Enter your postcode in the box provided and receive a free quote for the Grant Vortex Pro 21 boiler for your home. We are also happy to answer any questions you might have about any of our boilers. You can do this by emailing the team or calling us today on 01604 343053.


Installed price guideline
£3,700

Get your free quote

Grant Vortex Pro 21 Oil Combi boiler specifications

Powered by GasOil
LocationExternal
Condensing?Yes
Efficiency rating90.8%
Band ratingA
LPG Compatible?No
P/L Warranty2 Years
Output in kW21 kW
Height945 mm
Width658 mm
Depth754 mm
MountingFloor
Flow rate15 L/m
ERP HeatA
ERP WaterA

Grant Vortex Pro 21 Combi Oil boiler frequently asked questions

Is the Grant Vortex Pro 21 boiler a combi, system or regular boiler?

You might want to consider the Grant Vortex Pro 21 for your house or flat if you are looking for a combi boiler.

Combi boilers have much to recommend them - not least the fact that they save a lot of space. Combination (or combi) boilers were introduced by manufacturers in the 1970s to provide practical central heating and hot water distribution to smaller properties - remember that UK houses and flats tend to be among the smallest in the developed world.

Traditional boilers require one or more storage tanks to keep hot water warm and to store water for heating later. In contrast, combi boilers draw water directly from the mains supply and heat it instantly, removing the need for a storage tank. The heated water is then distributed to your taps and radiators on demand.

While combi boilers are suitable choices for many properties, especially those without a loft, there is also a disadvantage in using them. Water is heated instantly and the volume of water that can be heated at any one time is limited. This can result in less water being sent to taps and showers if more than one is being used simultaneously. In these instances, the water pressure to both points will drop.

Is a Grant Vortex Pro 21 combi boiler suitable for my house or apartment?

To determine that, we need to consider the size of the boiler. Size doesn't mean how big it is - it means how big its "output" is.

Boiler output is measured in kilowatts and tells you how much power a boiler can use to heat the water your taps, showers and radiators need. The higher the output, the more power it has.

When choosing a boiler, you should choose one that can cope with the peak demand for hot water in your home and not just your typical usage.

If its output is too low, sometimes your hot water will not be hot enough, but if your boiler's output is too high for your needs, your oil bills will go up and not down.

The output of the Grant Vortex Pro 21 combi is 21 kW, so which types of property would this Grant Vortex Pro 21 Combi boiler be an appropriate choice for?

Most Gas Safe engineers would suggest that the most suitable type of property for installing a Grant Vortex Pro 21 combi boiler would be smaller homes and apartments with up to 10 radiators and one bathroom.

With combi boilers, you need to consider the flow rate as well as the output rate. The flow rate (shown in litres per minute) measures how much water your boiler can draw from the mains which it then instantly heats and distributes to your taps and radiators.

However, a high flow rate is of little to no value if your local water pressure is low. If your local mains water pressure is 10l/m and your flow rate is 12l/m, your boiler will only be able to process 10l/m.

If you live in an area with high water pressure but your household has multiple bathrooms and/or radiators and many members of your household want to use hot water at the same time (like morning or evening baths or showers), it's unlikely that you'll be able to find a combi with a high enough flow rate.

As an indication, a power shower needs about 10 litres of water per minute, whereas the flow rate of this Grant Vortex Pro 21 Combi boiler is 15 L/ml/m.

When our engineer comes out to quote you, they may recommend that you choose a heat only boiler or system boiler instead if your family's demand for hot water is higher than normal.


The dimensions of the Grant Vortex Pro 21 are

The Grant Vortex Pro 21 measures 945 mm high and 658 mm wide by a depth of 754 mm.

Floor-standing external combi boilers like the Grant Vortex Pro 21 are housed in a strong weatherproof casing that protects them from rust and water ingress - they also offer much easier access for heating engineers if there is a fault or a repair is needed.

The risk of internal oil leaks and the damage and unpleasant odours they cause is also removed, as is the threat to your family's safety in the event of a carbon monoxide escape (the gas will simply disperse harmlessly into the atmosphere).

Is the Grant Vortex Pro 21 condensing or non-condensing?

This Grant Vortex Pro 21 is a condensing oil boiler - we always recommend that clients choose the latest condensing models to benefit from the technology, which continues to improve year after year.

Condensing boilers capture the heat still present in flue exhaust gases and water vapour condensation, processing them through a secondary heat exchanger to, among other tasks, heat colder water returning from your radiators.

By selecting a modern condensing boiler, you'll save money on your oil bills as well as benefitting the wider environment.

Is the Grant Vortex Pro 21 combi considered environmentally friendly?

With more and more people concerned about climate change, how we heat our homes and the damage it does to the environment is increasingly being questioned by British homeowners.

Dangerous levels of nitrogen dioxide emissions in larger UK cities are caused by gas boilers in domestic properties, and 14% of the UK’s greenhouse gas production is as a result of central heating.

If you would like your next boiler to help in the fight against climate change, would the Grant Vortex Pro 21 combi be a suitable choice?

All boilers manufactured in the UK from April 2018 must achieve a SEDBUK “A” grade and an energy efficiency rating of 92% or above. Before that, the minimum was 88% - efficiency ratings of 88% and 89% were scored a “B” and 90%+ an "A".

A boiler's energy efficiency rating describes how much energy it uses and wastes during its standard operation.

The energy efficiency of the Grant Vortex Pro 21 was rated at 90.8% with a SEDBUK grading of "A".

The aim of the Energy Related Products (ERP) Directive is to reduce the harmful gas emissions created during a product’s manufacture and active end use right through to its disposal.

The ERP rating for the Grant Vortex Pro 21 is "A" for heat and "A" for water.

What is the length of the warranty on the Grant Vortex Pro 21?

The manufacturer offers a parts and labour warranty of 2 years on the Grant Vortex Pro 21 boiler to new customers.


The top 10 rated Oil Combi boilers

Using the Plumbproud scoring system, the current 10 ten Oil Combi boilers assessed using a number of important variables are as follows:

1Worcester Bosch Greenstar Heatslave II 12/1876.19%
2Worcester Bosch Greenstar Heatslave II 18/2576.12%
3Worcester Bosch Greenstar Heatslave II External 12/1875.95%
4Worcester Bosch Greenstar Heatslave II 25/3275.83%
5Worcester Bosch Greenstar Heatslave II External 25/3275.58%
6Grant Vortex Pro 2167.46%
7Grant Vortex Pro 2667.43%
8Grant Vortex Pro 26kW67.35%
9Grant Vortex Pro 2167.31%
10Grant Vortex Pro 2667.14%
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