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Glow Worm Ultimate3 25 boiler

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Plumbproud rating

79.98%

Glow worm Ultimate3 25 heat only Gas boiler

This Glow worm Ultimate3 25 heat only boiler scores 79.98% on our PlumbProud boiler quality benchmark tests. To determine our rating, we consider many factors, such as the cost of installation, manufacturer guarantees, energy efficiency, and likely running costs.

We would expect this Glow worm Ultimate3 25 heat only boiler to cost £1,800 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.

We offer free quotes and professional advice and guidance on whether the Glow Worm Ultimate3 25 is a suitable choice for your home via a phone call on 01604 343053. Alternatively, please click here to email us or enter your postcode in the quote boxes on this page.


Installed price around

£1,800

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Glow worm Ultimate3 25 heat only Gas boiler frequently asked questions

What type of boiler is the Glow Worm Ultimate3 25 - regular, system or combi?

The Glow Worm Ultimate3 25 boiler is an option you may wish to consider if you're looking for a heat only boiler for your house or flat.

If your home has more than one bathroom or you have a large family that uses a lot of hot water, a heat only boiler (sometimes called a regular boiler, a conventional boiler or a standard boiler) is likely to be the best option for you. Heat only boilers require both a hot water or immersion cylinder and a cold water tank. Once the water in the cylinder is heated, you can use this hot water throughout the day and it can feed multiple taps and showers at the same time.

This is in contrast to a combi boiler which can only heat a limited amount of water at any one time. This can cause a problem if two or more taps and showers are being used simultaneously as the temperature, pressure and volume to all points will drop.

Heat only boilers allow you to program the times that you wish heat and hot water to be available. However, if you forget to do this and the immersion cylinder is empty, you may have to wait up to an hour before hot water becomes available again.

If your property already has a water tank and cylinder, it will nearly always be cheaper to replace like for like and not choose a different type of boiler. In addition to new pipework, you may need to replace older radiators that may be unable to cope with the higher water pressure delivered by other types of boiler.

Is the Glow Worm Ultimate3 25 heat only boiler suitable for my house or apartment?

It's best to choose a boiler whose size or "output" is right for your property. With boilers, however, size does not mean how big a boiler is, it means how much power it has.

A boiler’s output indicates the amount of power it can use when heating the water which it then sends to your taps and radiators. The higher the output rate, the more water it can heat.

If a boiler’s output is too low, there will be times when your hot water might not be as hot as you want it to be. If it is too high, you’ll likely be paying more than you need to for your gas.

Measured in kilowatts, the Glow Worm Ultimate3 25 heat only's output level is 25 kW, so which types of property would this Glow worm Ultimate3 25 heat only boiler be an appropriate choice for?

Most heating engineers would recommend this Glow worm Ultimate3 25 heat only boiler as a suitable option for medium-sized homes and larger apartments with 10-15 radiators and two bathrooms.


Glow Worm Ultimate3 25 - size in millimetres

The Glow Worm Ultimate3 25 is TBC mm in height, TBC mm in width and TBC mm in depth.

Ultimate3 25 – non-condensing or condensing?

Condensing boilers like the Glow Worm Ultimate3 25 improve energy efficiency and reduce your annual expenditure on gas.

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 heat only Glow Worm Ultimate3 25 boiler energy efficient?

As more of us are increasingly concerned about climate change, how we heat our homes and its impact on the environment has become an issue of importance to homeowners.

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.

Will you be helping the environment if you decide to install a Glow Worm Ultimate3 25 heat only in your home? Let’s look at the figures.

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 Glow Worm Ultimate3 25 was given an efficiency rating of 89.6% and a SEDBUK grading of "B".

If the Glow Worm Ultimate3 25 breaks down, will I be covered by the warranty?

On the Glow Worm Ultimate3 25, the manufacturer offers a parts and labour warranty of 5 years.


Glow worm Ultimate3 25 Gas heat only boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating89.6%
Band ratingB
LPG Compatible?No
P/L Warranty5 Years
Output in kW25 kW
MountingWall

The top 10 rated Gas heat only boilers

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

1Vaillant ecoTEC Plus 41596.51%
2Vaillant ecoTEC Plus 41895.45%
3Vaillant ecoFIT Pure 41294.82%
4Vaillant ecoTEC Plus 42494.77%
5Vaillant ecoFIT Pure 41594.23%
6Vaillant ecoTEC Plus 43094.23%
7Worcester Bosch Greenstar Ri 12Ri94.18%
8Worcester Bosch Greenstar Ri 15Ri93.93%
9Worcester Bosch Greenstar Ri 18Ri93.26%
10Vaillant ecoFIT Pure 41893.11%

Combi boilers

Choose from the UK’s biggest range of combis

Heat only boilers

The ideal boiler perfect for the largest homes

System boilers

Ideal for 3+ bedroom, 2+ bathroom homes

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Glow Worm Ultimate3 25 boiler

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Glow worm Ultimate3 25 heat only Gas boiler

  1. Home
  2. Glow worm Ultimate3 25
Plumbproud rating for this boiler
79.98%

Using the PlumbProud boiler quality scoring system, we have rated this model at 79.98%. To determine the rating, we factor in the price installed, energy efficiency, running costs, the warranty offered, and more.

We estimate that, on a standard, non-complicated installation, the supply and fitting charge for this Glow worm Ultimate3 25 heat only boiler will be around £1,800.

We offer free quotes and professional advice and guidance on whether the Glow Worm Ultimate3 25 is a suitable choice for your home via a phone call on 01604 343053. Alternatively, please click here to email us or enter your postcode in the quote boxes on this page.


Installed price guideline
£1,800

Get your free quote

Glow worm Ultimate3 25 Gas heat only boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating89.6%
Band ratingB
LPG Compatible?No
P/L Warranty5 Years
Output in kW25 kW
MountingWall

Glow worm Ultimate3 25 heat only Gas boiler frequently asked questions

Is the Glow Worm Ultimate3 25 boiler a combi, system or regular boiler?

If you are considering installing a heat only boiler in your house or flat, then the Glow Worm Ultimate3 25 boiler is certainly worth investigating.

Heat only boilers (sometimes called conventional boilers, standard boilers or regular boilers) need both a hot water cylinder with an immersion heater and a cold-water tank to work. The cold water tank (normally found in an attic or a loft) passes water when required to the hot water cylinder (normally found in a landing or airing cupboard), which heats the water and keeps it warm.

When you set the times you want for your hot water and central heating, the hot water for your taps, showers, baths and radiators is drawn from the hot water cylinder. Bear in mind though that, if you forget to program the system and the hot water cylinder is empty, you may have to wait up to an hour for your hot water.

A heat only boiler is usually the recommended option for families or properties with multiple bathrooms. This is because, unlike combi boilers which can only effectively provide for one outlet at a time without a drop in water pressure, volume or temperature, standard boilers can handle demand from multiple points around the home at once.

Is a Glow Worm Ultimate3 25 heat only boiler appropriate for my house or apartment?

It's best to choose a boiler whose size or "output" is right for your home.

The more hot water and heat you want, the higher the output level of your boiler should be. Output is measured in kilowatts and it describes the maximum level of power your boiler has to heat water.

If your output level is too low, your boiler will not have the power it needs to get your water as hot as you want it, particularly when there's a lot of demand for it. Choose a boiler whose output level is too high and you'll have all the hot water you need but will be paying too much for it through higher gas bills.

Which types of property would this Glow worm Ultimate3 25 heat only boiler be appropriate for given its output of 25 kW?

An experienced Gas Safe boiler installer would recommend that, at this level of output, the most suitable type of property for this Glow worm Ultimate3 25 heat only boiler would be medium-sized homes and larger apartments with 10-15 radiators and two bathrooms.


What are the dimensions of the Glow Worm Ultimate3 25 boiler?

The Glow Worm Ultimate3 25 has the following dimensions - TBC mm high, TBC mm wide, and TBC mm deep.

Is the Glow Worm Ultimate3 25 non-condensing or condensing?

Condensing gas boilers like the Glow Worm Ultimate3 25 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 gas to run.

How does the Glow Worm Ultimate3 25 heat only boiler rate environmentally?

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.

With central heating being responsible for 14% of greenhouse gas emissions in the UK, your choice of boiler matters. Gas boilers are also responsible for the significant atmospheric volumes of dangerous nitrogen dioxide emissions in larger British cities.

Do the figures suggest that installing the Glow Worm Ultimate3 25 heat only at your property would help in the fight against climate change?

The energy efficiency rating for a boiler describes the amount of energy it uses and wastes during operation and there are two different ways to measure it.

All boilers manufactured and supplied in the UK must have a SEDBUK rating of “A” subject to a minimum energy efficiency score of 92% or above. Before April 2018, the minimum energy efficiency score was 88% (88/89% = "B" SEDBUK rating, 90%+ = "A" SEDBUK rating).

The Glow Worm Ultimate3 25 scored an efficiency rating of 89.6% and a SEDBUK band rating of B.

How many years' warranty does the Glow Worm Ultimate3 25 heat only come with?

The Glow Worm Ultimate3 25 boiler comes with a parts and labour warranty of 5 years.


The top 10 rated Gas heat only boilers

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

1Vaillant ecoTEC Plus 41596.51%
2Vaillant ecoTEC Plus 41895.45%
3Vaillant ecoFIT Pure 41294.82%
4Vaillant ecoTEC Plus 42494.77%
5Vaillant ecoFIT Pure 41594.23%
6Vaillant ecoTEC Plus 43094.23%
7Worcester Bosch Greenstar Ri 12Ri94.18%
8Worcester Bosch Greenstar Ri 15Ri93.93%
9Worcester Bosch Greenstar Ri 18Ri93.26%
10Vaillant ecoFIT Pure 41893.11%
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