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Grant VortexBlue 21kW boiler

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Plumbproud rating

67.67%

Grant VortexBlue 21kW heat only Oil boiler

We have awarded this Grant VortexBlue 21kW heat only boiler a rating of 67.67% 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.

We would expect this Grant VortexBlue 21kW heat only boiler to cost £3,400 fully installed through PlumbProud, although it will cost more if the fit is complicated. We will provide you with a full quote before starting work, however.

For a free quote on the Grant VortexBlue 21kW boiler and to get professional advice and guidance on whether it is the right choice for your home, please enter your postcode in the quote boxes on this page, click here to email us, or call us on 01604 343053.


Installed price around

£3,400

GET A COMPETITIVE BOILER QUOTE

Please enter your postcode below to get a personalised quotation for the perfect boiler for your home

Grant VortexBlue 21kW heat only Oil boiler frequently asked questions

What type of boiler is the Grant VortexBlue 21kW?

Suitable for a house or a flat, the Grant VortexBlue 21kW heat only boiler is worth considering if you want a heat only boiler.

You can program a heat only boiler (sometimes called a standard boiler, a regular boiler or a conventional boiler) to provide hot water and heating at particular times of the day. Heat only boilers consist of a cold water tank (often housed out of sight in the loft), a hot water cylinder with an immersion heater (normally situated in an airing or landing cupboard), and a control panel.

Regular boilers are best suited for large households with many members, at least two of whom often need hot water at the same time.

Should I install a Grant VortexBlue 21kW heat only boiler in 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.

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 VortexBlue 21kW heat only's output is 21 kW, so which types of property would this Grant VortexBlue 21kW heat only boiler be appropriate for?

A heating engineer would recommend that this Grant VortexBlue 21kW heat only boiler would be a suitable installation choice for medium-sized homes and larger apartments with 10-15 radiators and two bathrooms.


What size is a Grant VortexBlue 21kW boiler?

The Grant VortexBlue 21kW has the following dimensions - 908 mm high, 505 mm wide, and 1,005 mm deep.

If you would like to reduce the space your boiler takes up in your home or you don't like the noise of an internal oil heater, you may want to consider the Grant VortexBlue 21kW - an external heat only boiler which is fitted outside your property.

Supplied in sturdy weatherproof housing designed to resist rusting and water ingress, an external boiler is much easier for a service engineer to work on if there is a fault or it needs repairing. External boilers also reduce the risk of carbon monoxide leakages inside your home.

Grant VortexBlue 21kW – non-condensing or condensing?

The Grant VortexBlue 21kW is a condensing oil boiler - this is the type of boiler we recommend to most clients because they're better for the environment and they will save money on annual fuel bills.

A condensing boiler captures and recycles the warmth still present in both the flue exhaust gases and water vapour condensation created when oil is burned to provide your boiler with power.

This means it needs less oil to operate and it uses this extra energy to perform a number of tasks, including heating the colder water that comes back to the boiler from the radiators in your home.

How environmentally friendly is the Grant VortexBlue 21kW heat only?

Many homeowners are becoming increasingly concerned about how they heat their homes and the impact it has on climate change and other important environmental issues.

Gas boilers are responsible for dangerous atmospheric levels of nitrogen dioxide emissions in Britain's biggest cities and, overall, 14% of the UK’s greenhouse gases are produced by our domestic central heating systems.

Would choosing a Grant VortexBlue 21kW heat only help in the fight against climate change? What do the performance statistics suggest?

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 VortexBlue 21kW has been assigned an efficiency rating of 90.8% with a SEDBUK rating of "A".

All products that consume energy throughout their lifespan must comply with the Energy Related Products (ERP) Directive.

Companies are legally obliged to reduce harmful gas emissions at all stages of a product's life cycle, from initial manufacturing right through to final disposal as well as when the product is in actual use.

The Grant VortexBlue 21kW scores "A".

What is the warranty period on a Grant VortexBlue 21kW heat only boiler?

The parts and labour warranty offered with this Grant VortexBlue 21kW heat only boiler covers you for 2 years.


Grant VortexBlue 21kW Oil heat only boiler specifications

Powered by GasOil
LocationExternal
Condensing?Yes
Efficiency rating90.8%
Band ratingA
LPG Compatible?No
P/L Warranty2 Years
Output in kW21 kW
Height908 mm
Width505 mm
Depth1,005 mm
MountingFloor
ERP HeatA

The top 10 rated Oil heat only boilers

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

1Worcester Bosch Greenstar Danesmoor Utility 12/1878.54%
2Worcester Bosch Greenstar Danesmoor Utility 18/2578.10%
3Worcester Bosch Greenstar Danesmoor Regular 12/1877.84%
4Worcester Bosch Greenstar Danesmoor Regular 18/2577.60%
5Worcester Bosch Greenstar Danesmoor External 12/1877.31%
6Worcester Bosch Greenstar Danesmoor External 18/2577.07%
7Worcester Bosch Greenstar Danesmoor Utility 25/3276.93%
8Worcester Bosch Greenstar Danesmoor Regular 25/3276.62%
9Worcester Bosch Greenstar Danesmoor Utility 32/5076.36%
10Worcester Bosch Greenstar Danesmoor External 25/3276.24%

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Grant VortexBlue 21kW boiler

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Grant VortexBlue 21kW heat only Oil boiler

  1. Home
  2. Grant VortexBlue 21kW
Plumbproud rating for this boiler
67.67%

On the PlumbProud boiler quality benchmark scoring system, we have rated this Grant VortexBlue 21kW heat only boiler at 67.67%. Ratings are determined by considering a number of important factors including the energy efficiency, price installed, warranty length, and running costs of the boiler.

On most non-complicated installations, we would expect this Grant VortexBlue 21kW heat only boiler to cost £3,400 including installation if you choose PlumbProud to do the work.

Get a free, no-obligation Grant VortexBlue 21kW boiler quote today by simply entering your postcode in the box on this page. You can also speak to a boiler installation expert about heating for your home by getting in touch via email or by phone on 01604 343053.


Installed price guideline
£3,400

Get your free quote

Grant VortexBlue 21kW Oil heat only boiler specifications

Powered by GasOil
LocationExternal
Condensing?Yes
Efficiency rating90.8%
Band ratingA
LPG Compatible?No
P/L Warranty2 Years
Output in kW21 kW
Height908 mm
Width505 mm
Depth1,005 mm
MountingFloor
ERP HeatA

Grant VortexBlue 21kW heat only Oil boiler frequently asked questions

What type of boiler is Grant’s VortexBlue 21kW - system, regular or combi?

The Grant VortexBlue 21kW is worthy of consideration if you're looking for a heat only boiler for your flat or house.

Heat only boilers, also known as regular or conventional boilers, need enough space for a hot water cylinder with an immersion heater (usually found in a landing cupboard) and a cold-water tank (usually found in a loft). The hot water cylinder keeps water warm and the cold water tank stores water that it passes to the hot water cylinder when required or programmed to do so.

You control how your heat only boiler works by programming it to heat water and provide central heating at the times and on the dates you choose. But if you forget to set times and dates and your hot water cylinder is empty, you may have to wait up to an hour before you have hot water again in your home.

Heat only boilers are often the best choice for a larger family or a property with multiple bathrooms as, unlike with combi boilers, there is no drop in water pressure, temperature or volume when more than one person wants hot water.

Is a Grant VortexBlue 21kW heat only the right boiler for my house or flat?

Whether this Grant VortexBlue 21kW heat only boiler is right for your property depends on its size or what its "output" level is. Size does not mean its physical dimensions, however - it means how powerful it is.

The output rating indicates how much energy a boiler can use in providing you with hot water and heat when you need it from your radiators and taps. The greater the output, the more water it can heat.

It's better to take advice on this from a registered installer because, if your boiler output is too low, your water and radiators might not get as hot as you would like them to be. However, if the output level is too high, you'll end up paying more on your oil bills than you need to.

Which types of property would this Grant VortexBlue 21kW heat only boiler be appropriate for given its output of 21 kW?

Most experienced Gas Safe boiler installers would recommend that a boiler with this output level would be most suitable for medium-sized homes and larger apartments with 10-15 radiators and two bathrooms.


What are the dimensions of the Grant VortexBlue 21kW boiler?

Grant’s VortexBlue 21kW is 908 mm tall, 505 mm wide, and 1,005 mm deep.

There are several benefits to choosing an external, floor-standing heat only boiler like the Grant VortexBlue 21kW. External boilers free up space indoors and reduce internal noise pollution to almost zero. They are also easier for an engineer to access if a problem develops and an external boiler reduces the chances of carbon monoxide leaking into your property.

External boilers are fitted in weatherproof housing and are perfect for homes that require oil-fired heating because they are not connected to mains gas. Leakage is always a possibility with oil boilers but, as this Grant VortexBlue 21kW heat only boiler is fitted outside your home, there is likely to be much less damage to your property if it leaks and no odour of oil in your home.

Is the Grant VortexBlue 21kW a condensing or non-condensing boiler?

We always recommend to clients that they select the very latest condensing boiler for their home.

Condensing boilers like the Grant VortexBlue 21kW are more efficient with the oil they use in operation, meaning that you'll benefit from lower fuel bills. Condensing boilers are also better for the environment.

They achieve their efficiency by capturing and recycling the heat still present in the water vapour condensation and flue exhaust gases created when a boiler burns oil to get the energy it needs. It then reuses that recycled heat to perform a number of tasks, including heating the colder water that comes back to your boiler via the radiator.

How energy efficient is the Grant VortexBlue 21kW heat only boiler?

How we heat our homes has become a pressing issue of concern for many homeowners worried about climate change and the environmental impact of their personal choices.

Gas boilers are responsible for dangerous atmospheric levels of nitrogen dioxide emissions in Britain's biggest cities and, overall, 14% of the UK’s greenhouse gases are produced by our domestic central heating systems.

Would choosing a Grant VortexBlue 21kW heat only help the environment? Let’s see what the performance figures suggest.

All boilers manufactured and installed in the UK are required to have an energy efficiency rating of 92% or above (or a good “A” SEDBUK rating). Before April 2018, when the law changed, the minimum energy efficiency level permissible was 88% (86-90% is a SEDBUK "B" rating and 90%+ is an "A" rating).

A boiler's energy efficiency rating indicates the amount of energy used and wasted during normal operational performance.

Following its assessment, the Grant VortexBlue 21kW was given an efficiency rating of 90.8% and a SEDBUK grading of "A".

All products that consume energy throughout their lifespan must comply with the Energy Related Products (ERP) Directive.

Companies are legally obliged to reduce harmful gas emissions at all stages of a product's life cycle, from initial manufacturing right through to final disposal as well as when the product is in actual use.

The Grant VortexBlue 21kW scores "A".

What is the length of the warranty on the Grant VortexBlue 21kW?

The parts and labour warranty on the Grant VortexBlue 21kW lasts for 2 years.


The top 10 rated Oil heat only boilers

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

1Worcester Bosch Greenstar Danesmoor Utility 12/1878.54%
2Worcester Bosch Greenstar Danesmoor Utility 18/2578.10%
3Worcester Bosch Greenstar Danesmoor Regular 12/1877.84%
4Worcester Bosch Greenstar Danesmoor Regular 18/2577.60%
5Worcester Bosch Greenstar Danesmoor External 12/1877.31%
6Worcester Bosch Greenstar Danesmoor External 18/2577.07%
7Worcester Bosch Greenstar Danesmoor Utility 25/3276.93%
8Worcester Bosch Greenstar Danesmoor Regular 25/3276.62%
9Worcester Bosch Greenstar Danesmoor Utility 32/5076.36%
10Worcester Bosch Greenstar Danesmoor External 25/3276.24%
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