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Grant Vortex Pro 21 boiler

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Plumbproud rating

67.46%

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 67.46% using our PlumbProud quality scoring system.

Provided the proposed installation is straightforward, we would anticipate that this Grant Vortex Pro 21 Combi boiler will cost £3,500 fully installed through PlumbProud.

To receive a free quote on the Grant Vortex Pro 21 boiler and to receive professional advice and guidance on whether it's the right choice for your home, please enter your postcode in the quote boxes on this page, click here to email us, or call 01604 343053.


Installed price around

£3,500

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Grant Vortex Pro 21 Combi Oil boiler frequently asked questions

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

If you are searching for a combi boiler for your house or flat, the Grant Vortex Pro 21 is certainly one to consider.

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.

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

You should make sure that the boiler you install in your property is the right "size". And, by size, we don't mean how big it is, we mean how powerful it is - the "output".

Your boiler has to be powerful enough to heat all the hot water you need for your radiators and taps. Power is measured in kilowatts and the more kilowatts a boiler has available to it, the more water it can heat.

If the output (measured in kilowatts) is too high, you'll have all the power you need and more but your oil bills will be much higher. If it's too low, you'll often find that the water coming out of your taps and fed into your radiators is only lukewarm.

With the Grant Vortex Pro 21 combi's output at 21 kW, which types of property would this Grant Vortex Pro 21 Combi boiler be most appropriate for?

Most experienced boiler engineers would recommend this Grant Vortex Pro 21 Combi boiler as a suitable option for smaller homes and apartments with no more than 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.


What size is a Grant Vortex Pro 21 boiler?

The Grant Vortex Pro 21 measures 860 mm tall, 614 mm wide, and 606 mm deep.

Hundreds of thousands of properties in the UK still have floor-standing boilers like the Grant Vortex Pro 21 despite the fact that over the last 20 years more compact, wall-hung boilers have become the preference for most homeowners keen to free up space in their properties.

While it is possible to replace your existing floor-standing boiler with a wall-mounted boiler to free up space in your home, please bear in mind that much of the pipework might need replacing, which is over and above the cost of the boiler and its installation. This will be a significant one-off investment if you do decide to switch and while the savings on your oil bills will repay it eventually, this will take a few years.

If you are considering the Grant Vortex Pro 21 as a replacement for your existing heat only or system boiler, you'll also have to budget for the removal of your hot water cylinder and/or your expansion tank.

If you would like professional information and guidance on the best choices for your home, please contact PlumbProud for advice.

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

Condensing oil boilers like the Grant Vortex Pro 21 are environmentally friendlier and cheaper to run so, if possible, we strongly recommend that you choose this or one of the very latest models.

Condensing boilers are much more efficient and economical to run because they contain a secondary heat exchanger that captures and recycles the warmth still present in the flue exhaust gases and the water vapour condensation for re-use, meaning that they use less oil to run.

Is the Grant Vortex Pro 21 combi a good choice for the environment?

Concern for the environment is causing more and more homeowners to think about how they heat their homes and its impact on climate change.

The power we need for our central heating systems accounts for around 14% of the UK’s greenhouse gas production. There are often dangerous levels of ambient nitrogen dioxide gases in the atmospheres of British cities because of our use of gas boilers.

Will choosing a Grant Vortex Pro 21 combi boiler for your home be positive for the environment? Let's examine the figures.

Every boiler manufactured and supplied in the UK must have an energy efficiency rating of 92% (SEDBUK “A” rating). These minimums were made law in April 2018 - before that, the minimum energy efficiency rating was 88% (88%/89% = "B" SEDBUK grade, 90%+ = "A" SEDBUK grade).

The Grant Vortex Pro 21 was awarded an efficiency rating of 90.8% and a band rating of "A".

Energy efficiency ratings for boilers describe the amount of energy they use and waste when switched on and working.

The ERP (Energy Related Products Directive) applies to all products that consume energy at any time in their lifetime, from manufacture to disposal and all points in between.

This European legislation intends to encourage manufacturers to offer end users products that are better for the environment through the creation of fewer harmful gas emissions at all points of a product's life cycle.

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

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

The Grant Vortex Pro 21 is supplied with a parts and labour warranty of 2 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
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 rated this Grant Vortex Pro 21 Combi boiler at 67.46% using the PlumbProud quality scoring system. To determine a rating, we weigh up a number of important considerations including the energy efficiency, estimated running costs, manufacturer's warranty, price of the boiler and more.

We estimate that this Grant Vortex Pro 21 Combi boiler will cost £3,500 fully installed through PlumbProud provided that the fit is straightforward.

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 combi, system or regular boiler?

If you are searching for a combi boiler for your house or flat, the Grant Vortex Pro 21 is certainly one to consider.

Traditional boilers often have up to two tanks that either store heated water or water to be heated later. Boiler manufacturers introduced combi boilers in the 1970s to avoid the need for those big tanks. Combi boilers allow homeowners to benefit from the reliable central heating and hot water level they want but without having to give up so much space within their properties - remember that homes in the UK are among the smallest in the developed world.

Your taps and radiators get the hot water they need with a combi boiler. Combi boilers draw cold water direct from the mains which is then heated instantly on demand and distributed to your radiators and taps.

However, combi boilers cannot heat very large volumes of water, which is their main disadvantage. So, for example, when someone wants to take a shower while another person wants to use a hot water tap to do the dishes, water pressure and quantity to both points decreases.

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

You should make sure that the boiler you choose for your property is the right "size". And size doesn't mean its physical dimensions. Size means how much power it has - the "output".

A boiler's output level measures how much power it can use to provide you with the hot water you need for your radiators and taps. If a boiler has a high output rate, it can heat greater volumes of water.

If you choose a boiler with too low an output, you'll find that the water coming out of your taps and in your radiators won't be as hot as you want it to be. Choosing one whose output is too high means you'll pay more than you need to for the oil your boiler needs to work.

The Grant Vortex Pro 21 combi outputs at a maximum of 21 kW, so which types of property would this Grant Vortex Pro 21 Combi boiler be appropriate for?

To most experienced Gas Safe engineers, the Grant Vortex Pro 21 combi Vortex Pro would be most suitable for smaller homes and apartments with up to 10 radiators and one bathroom.

As well as the output rate, you need to consider "flow rate" when choosing a combi boiler.

The flow rate describes how much water a combi boiler can draw from the mains, instantly heat, and then send to your radiators. Flow rates are measured in litres per second and this Grant Vortex Pro 21 Combi boiler's flow rate is 15 L/m.

The water in your mains pipe also has its own flow rate - normally between 10 and 12l/m in most parts of Britain. This means that, if you choose a combi boiler with a flow rate of 17l/m where local water pressure is 11lm, it won't actually process more water because of the slower flow rate of the mains.

In addition, larger households with more than one bathroom, multiple radiators, and where family members may want to use hot water at the same time (like morning showers) may actually need a boiler with a higher flow rate than either the boiler or the local mains pipe.

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.


Dimensions of the Grant Vortex Pro 21 boiler

The dimensions of the Grant Vortex Pro 21 are 860 mm [H] x 614 mm [W] x 606 mm [D].

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.

If you're considering replacing your existing heat only or system boiler with the Grant Vortex Pro 21, you will also need to remove the hot water cylinder and/or expansion tank.

For information and guidance on the best course of action, please contact PlumbProud and we'll share our thoughts.

Grant Vortex Pro 21 – condensing or non-condensing?

We recommend that you choose a condensing boiler wherever possible like the Grant Vortex Pro 21 - try to go for the latest model, if possible, to take advantage of improving technology.

Condensing boilers capture and recycle the warmth still present in the water vapour condensation and in flue exhaust emissions created by burning oil to make them more efficient and economical to run.

You will save money on your oil bills too, plus condensing boilers are friendlier to the environment.

Is the Grant Vortex Pro 21 combi a good choice for the environment?

Price and performance are two important issues when choosing a boiler but now, for many people in the UK, so is the environmental impact of how we heat our homes and its effect on climate change.

The heating of our homes accounts for 14% of the UK's greenhouse gas emissions. Especially in the big cities, gas boilers are responsible for dangerous levels of nitrogen dioxide emissions.

Is the Grant Vortex Pro 21 combi boiler an environmentally friendly choice for your home? Here’s what the figures say.

Boilers manufactured in the UK must be tested and, by law, achieve an energy efficiency rating of 92% or above, equivalent to a SEDBUK "A" grade. Most boilers achieve an "A" rating meaning they are at least 88% efficient.

The energy efficiency of a boiler indicates the amount of energy it uses (and wastes) during operation.

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

The ERP (or Energy Related Products Directive) is a European regulation governing products which require energy to operate throughout their lives and encourages manufacturers to create products that are more environmentally friendly.

The legislation is designed to reduce the potential for harmful gas emissions during manufacturing and actual use right through to the point of final disposal.

For the Grant Vortex Pro 21, the ERP rating is "A" for heat and "A" for hot water production.

How many years' warranty does the Grant Vortex Pro 21 combi come with?

Grant offers a parts and labour warranty of 2 years on the Grant Vortex Pro 21.


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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