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Grant Vortex Pro 21 boiler

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Plumbproud rating

67.46%

Grant Vortex Pro 21 Combi Oil boiler

We have determined a rating of 67.46% for this Grant Vortex Pro 21 Combi boiler on the PlumbProud quality scoring system. The rating is determined using a variety of important factors including price installed, manufacturer guarantees, energy efficiency and the likely cost of running.

We anticipate the supply and installation cost for this model of boiler will be around £3,500 on a standard fit.

You can speak to our friendly and professional advisors by calling 01604 343053. They can provide you with a free quotation on the Grant Vortex Pro 21 boiler and confirm that it is suitable for your home. You can also click here to email us or enter your postcode into the quotation box on this page.


Installed price around

£3,500

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Grant Vortex Pro 21 Combi Oil boiler frequently asked questions

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

The Grant Vortex Pro 21 boiler is a combi boiler you may wish to consider when looking for a new boiler for your house or flat.

Traditional boilers need one or more large tanks to work - one to heat and keep water warm for immediate use and the other to store water intended for heating later. Finding space for these large tanks is difficult in British residential property - remember that our houses and flats are among the smallest in the world. This is the problem that combi boilers were designed to solve when they were introduced in the 1970s.

Combi boilers don't need a tank - instead, they instantly heat water drawn from the mains using technology inside the boiler. This hot water is then distributed immediately to your taps or radiators on demand.

The biggest disadvantage to combi boilers is that they have a maximum capacity for heating water, meaning that they work best when only one point within a household wants hot water. For example, if someone is taking a shower and another person uses a hot water tap at the same time, the water pressure, volume and temperature to both points drops.

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

Whether this Grant Vortex Pro 21 Combi boiler is right for where you live depends on its size or "output" level. Size does not mean its physical dimensions, however - it means how powerful it is.

Measured in kilowatts, a boiler's output level is an indication of the amount of power it has available to it to heat the water coming from your taps and for warming your radiators. The greater the output level, the more water it can heat.

If you choose a boiler whose output level is too low, you'll often find that the water is not as hot as you want it to be. If you choose a boiler whose level is too high, you'll be paying higher oil bills than you need to for years to come.

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

An experienced PlumbProud heating engineer would recommend that the level of output from this Grant Vortex Pro 21 Combi boiler would make it a suitable installation option for smaller homes and apartments with up to 10 radiators and one bathroom.

When choosing a combi boiler like the Grant Vortex Pro 21, you need to consider the "flow rate" as well as the output rate. Flow rates (measured in litres per minute) indicate the volume of hot water that the boiler can heat up and then distribute to your taps and radiators.

However, combi boilers draw water from the mains and this means they can only heat the amount of water that actually enters your property.

What this means is that, if your mains pressure is 12 litres per minute, that is your boiler's effective flow rate even if it has the capacity to process 18 litres per minute. This Grant Vortex Pro 21 Combi boiler's flow rate is 15 L/m.

To give you an idea of the flow rate you might need, a power shower typically requires around 12 litres of water per minute and a basin tap requires 4-8 litres per minute.

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.


Grant Vortex Pro 21 size

The measurements of the Grant Vortex Pro 21 are 860 mm by 614 mm by 606 mm.

If you want to replace your floor-standing boiler with a more compact, wall-mounted model, this will give you and your family more space. Hundreds of thousands of homes in the UK still use floor-standing boilers like the Grant Vortex Pro 21, but wall-mounted models have been the most popular choice for homeowners over the last two decades. We can replace your floor-mounted unit with a wall-mounted unit, but please be aware that the cost of installation will be higher if we need to replace your current piping.

However, you can recoup this investment in full over a few years with the savings you make on your oil bills.

Please note that you'll need to remove your hot water cylinder and/or expansion tank if you intend to replace your current heat only boiler or system boiler with the Grant Vortex Pro 21.

Contact PlumbProud, and we'll share our experience and assistance for the best course of action.

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

Condensing boilers like the Grant Vortex Pro 21 improve energy efficiency and reduce your annual expenditure on oil.

They do this by capturing and recycling the warmth still present in water vapour condensation and flue exhaust gases to, for example, increase the temperature of the colder water returning from your radiators.

Condensing boilers are also much better for the environment because they emit fewer greenhouse gases.

Is the Grant Vortex Pro 21 combi an energy-efficient boiler?

As more of us become concerned by the effects of climate change, the damage we do to the environment by heating our homes has emerged as an important issue for many homeowners.

14% of the total amount of greenhouse gases produced by the UK comes from the central heating systems we use. In some of Britain's biggest cities, gas boilers create dangerous levels of nitrogen dioxide in the atmosphere.

Would installing a Grant Vortex Pro 21 combi boiler in your home be a green choice? Let's look at the numbers.

Boilers manufactured or supplied to UK domestic properties must achieve a legal minimum energy efficiency rating of 92% (equivalent to a good "A" grade using the SEDBUK scale). Prior to this, the minimum was 88% (88% and 89% are a "B" SEDBUK grade and anything 90% or above is an "A" grade).

The energy efficiency rating of a boiler refers to the amount of energy it uses to perform its everyday functions as well as the amount of energy it wastes.

The Grant Vortex Pro 21 has been given a rating of 90.8% for energy efficiency, equivalent to a SEDBUK "A" rating.

The ERP (Energy Related Products Directive) is European legislation that aims to reduce the use of energy at all points during a product's life, from the point of manufacture to when it's in active use right through to final disposal.

The regulation aims is to encourage manufacturers to create products that are more environmentally friendly and which reduce the harmful gas emissions associated with those products.

The ERP gradings for the Grant Vortex Pro 21 are "A" for heat and "A" for hot water.

If the Grant Vortex Pro 21 combi boiler breaks down, am I covered?

Parts and labour charges incurred during a repair on the Grant Grant Vortex Pro 21 boiler are covered by a 2 year warranty.


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
Height860 mm
Width614 mm
Depth606 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
67.46%

We have awarded this Grant Vortex Pro 21 Combi boiler a rating of 67.46% in our boiler quality benchmark tests. To determine a score for each boiler, we factor in several different points of comparison including energy efficiency, manufacturer guarantees, estimated running costs, price and more.

This Grant Vortex Pro 21 Combi boiler is likely to cost around £3,500 fully installed by PlumbProud if there are no unexpected complications during the fit.

For a free, no-obligation quotation on this Grant Vortex Pro 21 Combi boiler or for our professional advice on whether the Grant Vortex Pro 21 is suitable for your property, please call 01604 343053, click here to email our team or enter your postcode into the quotation box on this page.


Installed price guideline
£3,500

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
Height860 mm
Width614 mm
Depth606 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 a standard, combi or system 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.

Would the Grant Vortex Pro 21 combi be a suitable choice of boiler for my house or flat?

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

This Grant Vortex Pro 21 Combi boiler gets its power from oil and the power it's capable of producing is measured in kilowatts - the output rate is actually a kilowatt rate. The higher the output rate, the more kilowatts a boiler can use when heating water.

If you choose a boiler whose output rate is too low, it may not have enough power to make your water as hot as you would like. If you choose a boiler whose output rate is too high, you won't have to put up with lukewarm water but you will face higher oil bills.

The Grant Vortex Pro 21 combi boiler has an output level of 21 kW, so which types of property would it be appropriate for?

A boiler engineer would recommend that, at this level of output, the most suitable type of property for this Grant Vortex Pro 21 Combi boiler would be smaller homes and apartments with up to 10 radiators and one bathroom.

With all combi boilers, you need to consider the "flow rate" as well as the output rate when making your decision.

Like all combi boilers, the Grant Vortex Pro 21 draws water from the mains. It instantly heats that water and then distributes it to the parts of your home which need it - taps, radiators, bathrooms, and so on. This Grant Vortex Pro 21 Combi boiler's flow rate is 15 L/m.

There is no benefit to purchasing a boiler with a high flow rate if the local water pressure is not that good - a high flow rate doesn't mean that your combi can draw more water from the mains.

In addition, if you live in a home with a large number of radiators and more than one bathroom and if more than one person regularly wants to use hot water at a time, a combi boiler may struggle to provide enough water at a hot enough temperature.

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.


Grant Vortex Pro 21 dimensions

The Grant Vortex Pro 21 has the following dimensions - 860 mm high, 614 mm wide, and 606 mm deep.

While, in the last 20 years, wall-hung boilers have become the product of choice for most homeowners in the UK, there are still hundreds of thousands of floor-standing boilers like the Grant Vortex Pro 21 in use across the country. You can replace your existing floor-standing boiler with a compact wall-mounted unit if you want to free up space and but you'll likely have to pay for new piping and pipework.

The savings on your oil bills will save you more than you pay for your new smaller boiler but this will take a few years.

Please note that if you choose to replace your current system or heat only boiler with the Grant Vortex Pro 21, we'll also need to remove your hot water cylinder and/or expansion tank.

Should you require help, please contact PlumbProud as we would be happy to provide guidance.

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

Condensing oil boilers like the Grant Vortex Pro 21 are more energy-efficient and choosing one for your home will cut the amount you pay every year for your oil.

They do this by capturing the heat in water vapour condensation and in exhaust gases which would normally be expelled via the flue. They then recycle that heat, returning it to the system to, among other tasks, reheat colder water that is returning to your boiler from your radiators.

Is the Grant Vortex Pro 21 combi environmentally friendly?

How we heat our homes is an issue which many homeowners worry about as the world combats climate change and environmental damage.

14% of the total amount of greenhouse gases produced by the UK comes from the central heating systems we use. In some of Britain's biggest cities, gas boilers create dangerous levels of nitrogen dioxide in the atmosphere.

Would choosing the Grant Vortex Pro 21 combi be an environmentally-friendly choice? If so, let's look at its performance figures.

Boilers manufactured after April 2018 in the UK must achieve an "A" on the SEDBUK grading system as well as score a minimum of 92% on a separate energy efficiency test. Prior to that, the minimum was 88% - boilers rated at 88% and 89% were given a “B” rating (90% and higher were given an "A").

An energy efficiency rating describes how much energy the boiler uses and how much it wastes when in use.

The Grant Vortex Pro 21 was awarded an efficiency rating of 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.

How long is the warranty period on the Grant Vortex Pro 21 combi boiler?

The Grant Vortex Pro 21 is covered by a parts and labour warranty of 2 years following installation.


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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