Best Glow-Worm Ultimate3 System Boilers for Home Uses |Reviews, Comparisons and Buyers Guide

The Glow-worm Ultimate3 System is a gas condensing sealed system boiler that is smart compatible and A-rated for efficiency.

If you want to replace your old boiler with a new energy-efficient model that is backed by a great warranty, the Glow-worm Ultimate3 System could be the answer. Ideal for homes with high hot water demands, this boiler comes complete with a straightforward interface and a load of impressive features that promise to help reduce your fuel bills. It’s also compatible with a range of optional intelligent accessories including the MiGo app-based control that lets you manage your heating and hot water via a smartphone.

The average cost of a Glow-Worm Ultimate System Boiler is £820.00, which includes VAT and excludes installation.

A budget solution for homes with high hot water demands, the Glow-Worm Ultimate3 System is available in a 25kW output and must be used with a cylinder for storing hot water.

The unit measures 740mm (H) x 418mm (W) x 300mm (D) and is designed to offer excellent reliability and heating performance. You’ll also be pleased to know that this high efficiency sealed system model complies with the latest ErP directive.

The Ultimate3 System typically costs £820.00 which includes a 5-year parts and labour warranty only if the installation is registered on the Glow-Worm Club Energy programme by a Gas Safe installer. We can help you with our four best findings available:

  • Glow-worm Ultimate3 25kW System Gas Boiler– The Ultimate3 25kW System gas boiler is a highly reliable boiler that boasts a wide variety of features and benefits and comes designed and manufactured by Glow-worm.
  • Glow-worm Ultimate3 25kW System Gas Boiler– The Ultimate3 25kW System gas boiler is a highly reliable boiler that boasts a wide variety of features and benefits and comes designed and manufactured by Glow-worm.
  • Glow-worm Ultimate3 25kW System Gas Boiler– The Ultimate3 25kW System gas boiler is a highly reliable boiler that boasts a wide variety of features and benefits and comes designed and manufactured by Glow-worm.
  • Glow-worm Ultimate3 25kW System Gas Boiler– The Ultimate3 25kW System gas boiler is a highly reliable boiler that boasts a wide variety of features and benefits and comes designed and manufactured by Glow-worm.

                        

NameOur RatingAvailabilityPrice              Efficiency Ratings
Glow-worm Ultimate3 25kW System Gas Boiler8.7/10YES£72589.7%  
Glow-worm Ultimate3 25kW Regular Gas Boiler8.6/10 YES£72589.6%
Glow-worm Ultimate3 30kw Combi Gas Boiler8.6/10 YES£70589.6%
Glow-worm Ultimate3 35kw Combi Gas Boiler8.7/10YES£77589.7%

Glow-worm Ultimate3 25kW System Gas Boiler

The Ultimate3 25kW System gas boiler is a highly reliable boiler that boasts a wide variety of features and benefits and comes designed and manufactured by Glow-worm.

 This is a highly efficient unit that comes with an efficiency rating of 89.7% and an ErP A rating which will help save you money on your energy bills. Having an output rating of 25kW, the Ultimate3 System boiler is perfectly suited to larger homes with more than 1 bathroom that have a high demand for heating and hot water.

 As a compact unit that comes wall-mounted, it will help save valuable space around the home. Despite its size, the Ultimate3 unit still houses lots of features such as an automotive-grade aluminium heat exchanger to offer high performance, a Grunfos modulating pump to help reduce energy usage and save you money, a bright LCD with easy-to-use interface, an inbuilt filling loop to help for straightforward maintenance and full compatibility with Glow-worm’s MiGo app to give you control over the unit from your phone.

 With this being a System boiler, it sends hot water to the radiators and a sealed hot water storage cylinder. The important parts of the system are built into the boiler which makes it more compact and easier to service.

 Featuring a 5-year warranty, you’ll have the peace of mind that this boiler isn’t going to let you down.

Advantages:

  • Suited to small to medium-sized homes
  • Easy to use and service
  • Grundfos pump – reduces energy use and fuel bills
  • High-grade aluminium heat exchanger – reliable performance
  • Provides maximum energy efficiency – reduce fuel bills and carbon emissions

Disadvantage:

  • Glow-worm boilers have an overall Which? score of 54%

Features:

Band RatingB Rated
ERP RatingA Heat
Central Heating Max. Output25kW
Flow RateN/A
LPG CompatibleNo
MountingWall Mounted
Typical Price (inc VAT)£725
Typical installation Cost (inc VAT)*£500 – £1,000
Total Cost£1,225 – £1,725

Product Key Specifications:

MakeGlow-worm
ModelUltimate3 25kW System Gas Boiler
Is CondensingCondensing
Efficiency Rating89.7%
Standard Warranty5 Years

Glow-worm Ultimate3 25kW Regular Gas Boiler

The Ultimate3 Regular gas boiler is a compact, condensing and a wall-mounted unit designed and manufactured by Glow-worm.

 As this is a condensing unit, it offers high efficiency, with an efficiency rating of 89.6% and ErP A rating. With an output rating of 25kW, the Ultimate3 is perfectly suited to larger homes with 2 or more bathrooms that have a higher demand for heating and hot water.  Thanks to its compact size, this boiler can fit into a kitchen cupboard and help to save valuable space around the home. As well as being small, the Ultimate3 is lightweight which will help to save money and time on the installation and future services. Despite its small stature, there’s still room for plenty of features, such as

a bright LCD, easy to use interface, full compatibility with a range of accessories like the MiGo app so you can control the heating from your phone and a high-quality automotive-grade aluminium heat exchanger.

 As this is a Regular boiler, also known as a Conventional or Heat Only boiler, it heats your central heating system directly and also produces hot water for your cylinder. Because you need a hot water cylinder, often fed by a cold-water storage cistern located in the attic, this type of boiler requires a lot of space so isn’t suitable for smaller properties or homes where space is limited.

 Featuring a 5-year parts and labour warranty, you’ll be getting the peace of mind that you’re well covered long after installation.

https://www.boilerguide.co.uk/productinfo/glow-worm/ultimate3-25kw-regular-gas-boiler

Advantages:

  • Compatible with a range of intelligent controls – improves efficiency and performance
  • Compatible with the MiGo app-based control – maximises efficiency, learns your energy needs and allows you to manage your heating and hot water from anywhere
  • 5-year warranty
  • A-RATED COMBI BOILER
  • SAVE MONEY ON YOUR GAS BILLS

Disadvantage:

  • Requires separate cylinder

Features:

Band RatingB Rated
ERP RatingA Heat
Central Heating Max. Output25kW
Flow RateN/A
LPG CompatibleNo
MountingWall Mounted
Typical Price (inc VAT)£725
Typical installation Cost (inc VAT)*£500 – £1,000
Total Cost£1,225 – £1,725

Product Key Specifications:

MakeGlow-worm
ModelUltimate3 25kW Regular Gas Boiler
Is CondensingCondensing
Efficiency Rating89.6%
Standard Warranty5 Years

Glow-worm Ultimate3 30kw Combi Gas Boiler

The Ultimate3 30kW is a highly reliable condensing Combi gas boiler that has been designed and manufactured by Glow-worm. It is a compact unit that will help you to save space around the home as it can fit in a cupboard.

 This is a highly efficient boiler, that could help you to save money on your energy bills, as shown by its seasonal efficiency rating of 89% and ErP A rating. With this highly reliable boiler being a 30kW boiler it is perfectly suitable for the larger homes with a high demand for heating and hot water. As well as those homes with more than two bathrooms. This boiler comes in two outputs the 30kW and 35kW making the unit able to suit all larger sized homes.

 A wide range of features give the Ultimate3 its reliability, from an automotive-grade aluminium heat exchanger for high performance, a Grundfos modulating pump that helps reduce energy, a modern bright LCD with an easy to use interface to give you maximum control over the unit, an inbuilt filling loop helping for straightforward maintenance and a wide range of flue options so that it can be installed just about anywhere.

 Being a Combi boiler, this unit is a water heater and central heating boiler wrapped into one compact unit, meaning that you won’t require a hot water cylinder. As well as saving space around the home, you’ll be getting instant heating and hot water when you need it. Backed by a lengthy 10-year warranty, the Ultimate3 by Glow-worm is a unit you can be sure won’t let you down.

Advantages:

  • HIGHLY EFFICIENT GRUNDFOS PUMP
  • MAXIMISES EFFICIENCY AND LOWERS RUNNING COSTS
  • AUTOMOTIVE GRADE ALUMINIUM HEAT EXCHANGER
  • HIGHLY EFFICIENT PERFORMANCE
  • CLEAR LED DISPLAY

Disadvantage:

  • Glow-worm boilers have an overall Which? score of 54%

Features:

Band RatingB Rated
ERP RatingA Heat A Water
Central Heating Max. Output30kW
Flow Rate12.4 l/min
LPG CompatibleYes
MountingWall Mounted
Typical Price (inc VAT)£705
Typical installation Cost (inc VAT)*£500 – £1,000
Total Cost£1,205 – £1,705

Product Key Specifications:

MakeGlow-worm
ModelUltimate3 30kw Combi Gas Boiler
Is CondensingCondensing
Efficiency Rating89.6%
Standard Warranty10 Years

Glow-worm Ultimate3 35kw Combi Gas Boiler

Designed and manufactured by Glow-worm, the Ultimate3 35kW Combi gas boiler is a highly reliable condensing unit that’s compact.

 The Ultimate3 is a highly efficient unit, shown by its seasonal efficiency rating of 89% and ErP A rating. The output rating of 35kW makes this unit perfectly suitable for larger homes that have a high demand for heating and hot water, as well as homes that have 2 or more bathrooms. The range also includes a 30kW model for homes with slightly lower heating and hot water demands. Being a Combi boiler, the Ultimate3 supplies hot water and heating on demand by using the mains water supply. This means you don’t need to have bulky tanks or cylinders, perfect for smaller homes where space is limited.

 As a compact, wall-mounted unit, this is a unit that can be installed away in a cupboard and not take up too much space. Despite the compact size, there’s still plenty of room for a host of features, such as a bright LCD with an easy-to-use interface to give you maximum control over the unit, a high-quality automotive-grade aluminium heat exchanger to provide high performance, a Grundfos modulating pump helping to reduce your energy bills, a filling loop for straightforward maintenance and full compatibility with a wide range of flue options which gives flexibility when finding a location to install the unit.

 Featuring a lengthy warranty of 10 years, you know that this isn’t a boiler that will let you down.

Advantages:

  • DELIVERS CLEAR VISIBILITY IN POOR LIGHT CONDITIONS
  • INBUILT FILLING LOOP
  • LOWER MAINTENANCE COSTS
  • COMPATIBLE WITH THE FULL RANGE OF GLOW-WORM CONTROLS
  • ALTERNATIVE ENERGY AND COST SAVING OPTIONS
  • 5-YEAR PARTS AND LABOUR WARRANTY WHEN REGISTERED THROUGH CLUB ENERGY

Disadvantage:

  • Requires separate cylinder

Features:

Band RatingB Rated
ERP RatingA Heat A Water
Central Heating Max. Output35kW
Flow Rate14.4 l/min
LPG CompatibleYes
MountingWall Mounted
Typical Price (inc VAT)£775
Typical installation Cost (inc VAT)*£500 – £1,000
Total Cost£1,275 – £1,775

Product Key Specifications:

MakeGlow-worm
ModelUltimate3 35kw Combi Gas Boiler
Is CondensingCondensing
Efficiency Rating89.7%
Standard Warranty10 Years

BUYING GUIDE- Glow-Worm Ultimate3 System Boilers

Given below is a detailed guide on Glow-Worm Ultimate3 System Boilers:

How long is the Warranty on this Boiler?

If you purchase the Ultimate3 System, you’ll receive a 5-year part and labour warranty but your Gas Safe registered installer must register the installation on the Club Energy loyalty programme.

Does this Boiler have a Good Range of Controls and Features?

When it comes to controls, the boiler has all the usual buttons and switches together with controls that let you adjust the temperature of your heating and hot water. The Ultimate3 System is compatible with optional controls too, but you will need to pay more to get your hands on these. Glow-worm’s most popular control option is the MiGo personal heating assistant that cleverly learns your energy requirements and enables you to control both the heating and hot water from your smartphone or tablet. This boiler also has a clear LCD, the high-efficiency Grundfos pump and a high-grade aluminium heat exchanger for superior performance.

Is it a High Efficiency Boiler?

Yes. This boiler is ErP A-rated and has an efficiency of 94%, so it should help to cut the cost of your annual energy bills. It has some high-efficiency features, such as a modulating Grundfos pump that can adapt the boiler’s output to meet your heating and hot water requirements. Also, the Ultimate3 System can be used with Glow-worm’s range of intelligent controls that are designed to improve boiler efficiency.

How will I know if this Boiler is Suitable for My Home?

The Ultimate3 System by Glow-worm is a system boiler and will require a separate cylinder for storing your hot water. This type of storage cylinder is commonly housed in an airing cupboard. System boilers are best suited to homes with high demands and properties that have more than one bathroom because they can provide a constant supply of hot water, even when multiple taps, showers or baths are running simultaneously. They’re also ideal for dwellings with limited loft space as there is no need for any loft tanks.

As it’s essential that you choose the right type and size of boiler for your property, you should always consult a Gas Safe registered engineer before you fork out for a new boiler. If you pick a boiler that is too big or small for your needs, you’ll see an increase to your energy bills or your system won’t be capable of producing enough heating and hot water for your home.

How Much Does this Boiler Cost?

Glow-worm’s Ultimate3 System comes in an output of 25kW and has an average cost of £810. Don’t forget, you’ll need to have the boiler installed by a professional, which is an additional cost that usually starts at around £1,500. To save on boiler and installation costs, we recommend you shop around and compare quotes from local and national installers.

Is the Glow-Worm Ultimate3 System the Right Boiler Type and Size for Your Home?

When used in conjunction with a hot water storage cylinder (usually found in the airing cupboard), the Ultimate3 System is a great choice for small to medium-sized properties with more than one bathroom. The boiler doesn’t require a cold water tank in the loft as it draws directly from the water mains, making it ideal for homes with little or no loft space. Please be aware that this information is to be used as a rough guide, and you must ask a Gas Safe engineer to look at your home to determine whether this boiler can meet your needs.

Ultimate3 System Technology and Main Advantages

This competitively priced model features a user-friendly interface and bright LCD to allow you to control temperatures and set heating and hot water on and off times, even when the appliance is sited in a poorly lit area. The boiler is also easy to install and maintain as most of the components are built into the unit itself and it even comes with an inbuilt filling loop.

Glow-Worm has included a high-quality Grundfos pump, along with an automotive-grade aluminium heat exchanger for reliable performance and to ensure the boiler remains quiet when in use. The Ultimate3 System is also compatible with a range of additional controls to offer you the ultimate in comfort, efficiency and convenience.

Boiler Energy Efficiency Credentials

Glow-Worm’s Ultimate3 System is ErP A-rated, which means it will help to reduce your energy bills as it’s one of the most energy-efficient and environmentally friendly boilers on the market. The unit comes with a high-efficiency Grundfos modulating pump that can automatically adapt its output to match your heating and hot water requirements, which helps to lower running costs and maximize the amount of cash you save. If you want to improve efficiency levels, you can choose from a selection of optional controls including a Climastat room thermostat and the MiGo personal heating assistant.

What do Industry Experts have to Say?

At Glow-worm we make working with us easy and rewarding with all the support when you need it. We offer outstanding products, practical hands-on training and unrivalled service across the UK. Our wide range of high-quality products includes domestic gas boilers in combi, sealed system and regular open vent options which are supported by a full range of flue systems and accessories. We also meet Boiler Plus with a range of easy-to-use load and weather compensating thermostat controls and the smart MiGo app-based control – all of which are simple to install.

Quality product

Every Glow-worm boiler undergoes 499 quality checks before it leaves our award-winning UK factory and they come with a range of guarantee options for up to 15 years. So, your customer will have total peace of mind. Install confidence.

Practical hands-on training

We run industry-standard Glow-worm training courses at seven Centers of Excellence across the UK. These are hands-on practical installation and maintenance courses and will help you start how you mean to go on. Just the job.

Rewarding loyalty and support

Register every installation straight from your mobile using our Plumbing Toolbox app or on our Club Energy website and we’ll even give you cash back and exclusive free extended guarantees to support your business. Consider it done.

https://www.glow-worm.co.uk/glow-worm/products-1/ultimate-3/ultimate3/ultimate3-24pp-brochure-vs-1-0-11-1258538.pdf

Construction and Material:

The new Boiler Plus legislation has been designed to ensure that all households in the UK are energy efficient. Boiler Plus is the biggest piece of legislation since 2005 when the UK became the first country to become “all-condensing”.

All new boilers from April 2018 must have a minimum ErP efficiency of 92% with time and temperature controls fitted if they aren’t already present and working correctly.

Also, combi boilers, the most popular boiler type in the market require one of four additional requirements. Each will need to suit each individual homeowner’s circumstances. The measures available are:

  • Load compensation – the ability to use the current room temperature to modulate the flow temperature, this needs the control and boiler to intelligently communicate.

• Weather compensation – the ability to use outdoor sensors to monitor the outside temperature and modulate the flow temperature from the boiler.

• Smart control – An internet connected control that provides automated heating, hot water and optimized boiler efficiency.

From the feature-rich MiGo personal heating assistant to the very simple and cost-effective Climastat room thermostat, Glow-worm offers a wide range of intelligent and easy to use solutions to meet Boiler Plus.

Intelligent controls

All Glow-worm controls have been designed to work with the Ultimate3 boiler range, so they are simple to install and your customer will get the ultimate in running efficiency, convenience and comfort. Adding any of our intelligent controls to your boiler will mean you are complying with the Boiler Plus legislation.

Climastat Thermostat

• Can be used in conjunction with a analogue plug in timer

• Wall mounted Climastat connects using simple low voltage eBus

• eBus connected Climastat means the boiler will modulate to manage heating in the most efficient way possible

• Heating & hot water mode on indicator

• Service, fault and maintenance indication

• Clear digital display with 0.5˚C temperature intervals

• Wide temperature range 5 – 30˚C

Climapro1 Wired & Wireless Programmable Thermostat

• Secure wall mounted thermostat is wired using simple low voltage eBus

• User friendly design with bright backlight

• Clear straightforward menus to set heating & hot water programmes

• Annual service reminder and auto daylight saving time

• eBus connected Climapro1 means the boiler will modulate to manage heating in the most efficient way possible

• Weather compensation using a simple wired or wireless outdoor sensor

• Climapro1 RF wireless version available

 • Climapro1 wired version can be used with the smart wiring center to offer two heating and one hot water zone. (S Plan Plus)

• Automatic daylight-saving time

Climapro2 RF Wireless Programmable Thermostat

• Wireless thermostat works anywhere in the home

• Wall bracket for base location and secure storage

• RF receiver slots into the boiler, simple wireless setup, no electrician required

• User friendly design with bright backlight

• Clear straightforward menus to set heating & hot water programmes

• Annual service reminder and auto daylight saving time

• eBus connected Climapro2 RF means the boiler will modulate to manage heating in the most efficient way possible

• Weather compensation using a simple wireless outdoor sensor

Wired & Wireless Outdoor Sensor

• Enables weather compensation when paired with Climapro1 & Climapro₂

• Works on indirect sunlight which re-charges the small PV cells

• Simple and quick to install

• No batteries required

MiGo Smart Control

• Smart phone app for Apple & Android devices to manage heating & hot water on the go

• Simple & straightforward installation – Installed and running in less than 30 minutes

• Easy & intuitive interface – Fast and straightforward temperature control

• Self learning – MiGo automatically learns the energy requirements of your home

• Installation assistant – Seriously simple step by step pairing process

• Internet weather compensation – MiGo only ever uses your energy as and when it needs to without an outside temperature sensor

• Energy consumption monitoring – Gas and electricity consumption for both heating and DHW

• eBUS communication – MiGo and Glow-worm boilers speak the same ‘language’!

• One heating circuit and DHW management – DHW and central heating control from one device

• In room thermostat can be wall mounted or a portable table top version

• Electronic paper display – Clear display with low energy consumption

• Multi user sharing and multi-home control – You and your family can manage several heating systems for the same or different locations

Research & methodologies used behind the in-depth analysis of Best Glow-Worm Ultimate 3 System Boilers:

Horizontal top side flue (standard)

L = Flue length, measured from outside wall face to center line of flue outlet.

X = Wall thickness.

Y = Distance from wall to edge of air duct on flue elbow.

Z = Distance from center line of flue outlet to inside wall face.

The maximum flue length with extensions must not be exceeded (refer to L in the table below). For each additional 90° or 2 x 45° bends fitted, the maximum flue length must be reduced by 1m. The pipe length is reduced by 500mm for each 45° elbow and 1m for each 87° elbow used.

Vertical flue options

L = Flue length, measured from the top of the boiler to the underside of the roof flashing

Maximum flue length is 10m plus external vertical roof terminal. The maximum flue length must not be exceeded (refer to L in the table below). For each additional 90° or 2 x 45° bends fitted, the maximum flue length must be reduced by 1m. The pipe length is reduced by 500mm for each 45° elbow and 1m for each 87° elbow used. Vertical flue options use the same 100mm diameter flue components as the horizontal flue options.

The vertical flue adaptor G is required for vertical installations.

Horizontal top side flue (standard)

L = Flue length, measured from outside wall face to centre line of flue outlet.

X = Wall thickness.

Y = Distance from the side of the boiler to the inside wall face.

Z = Distance from centre line of flue outlet to the side of the boiler.

The maximum flue length with extensions must not be exceeded (refer to L in the table below). For each additional 90° or 2 x 45° bends fitted, the maximum flue length must be reduced by 1m. The pipe length is reduced by 500mm for each 45° elbow and 1m for each 87° elbow used.

Stories From The Real-World Use Cases

with our old boiler they weren’t. It’s so nice having a really warm house now and it warms up quicker.

  • Name: Paul Nicholson
  • Date: 2/12/2020
  • Feedback in Detail:

Hi very happy with boiler and fitting 👍

  • Name: Kt
  • Date: 2/12/2020
  • Feedback in Detail:

25-year-old boiler. Replaced with glowworm combi. Absolutely brilliant piece of kit. Highly recommend.

  • Name: Mrs. Eva
  • Date: 2/12/2020
  • Feedback in Detail:

Works more efficiently and very pleased with new boiler would definitely recommend.

https://www.trustpilot.com/review/glow-worm.co.uk?stars=5&aspects=boiler

FAQs:

Q: How long do glow worm boilers last?

A: Servicing older models is usually fine, but remember that even newer generation Glow-worm boilers only last around 12 – 15 years.

Q: Are Glow Worm good boilers?

A: Glow-worm combi boilers are reliable and efficient units that won’t break the bank. They’re the ideal choice for homes with a low to moderate demand for central heating and hot water with 24-27 kW models being ideal for properties with 1 bathroom and up to 10 radiators.

Q: Can a combi boiler be used as a system boiler?

A: Firstly, the combi boiler has to be removed, and the system boiler fitted in the same location – this switch can take up to one day. Then, the unvented cylinder has to be fitted in a cupboard or attic space.

Q: What does f3 mean on my boiler?

A: This fault is caused by a loose or damaged fan. This issue could be related to deeper problems such as loose or damaged connections, water damage from a boiler leak, a fault with the air pressure switch, or a problem with the printed circuit board.

Q: Can a boiler last 20 years?
A: Most boiler manufacturers and fitters put a similar timescale between new installations, and it’s usually around 15 years. … Yes, boilers, even modern ones, will, in theory, last longer than 15 years.

Q: What temperature should I set my Glow Worm boiler?

A: Try to run the flow temperature at 65 degrees, and the return should ideally be 55 or less, this allows the boiler to condense and run more economically.

Q: How old is my boiler Glow Worm?

A: The serial number is usually displayed on a barcoded sticker at the top of your boiler. This number will be smaller than the Ideal Classic serial code, so you’ll want to go to the last 4 digits and this represents the month and year the boiler was manufactured – pictured below for reference.

Q: Is a system boiler better than a combi?

A: For larger homes with multiple bathrooms, particularly with showers in use at the same time, a system boiler with a large hot water cylinder is nearly always a better option. Bigger combi boilers have been developed to provide lots of hot water, but they can make the heating system less efficient.

Q: Is a combi boiler cheaper to run than a conventional boiler?

A: High Efficiency: Combi boilers are highly efficient. You can save money on your heating bills by switching from a conventional boiler to a combi boiler. More Affordable: The installation cost of a combi boiler is low as compared to a traditional heating system. Combi boiler parts are easy to find as well.

Q: How do I lower the pressure on my boiler?

A:

  • Switch off your boiler and wait for the heating system to cool.
  • Identify and check the boiler pressure gauge.
  • If it’s above 2 bars, you’ll need to reduce the pressure.
  • Ensure the filling loop or relief valve is tightly closed.

DID YOU KNOW?

  • Glow-worm combi boilers are reliable and efficient units that won’t break the bank. They’re the ideal choice for homes with a low to moderate demand for central heating and hot water with 24-27 kW models being ideal for properties with 1 bathroom and up to 10 radiators.

https://www.boilerguide.co.uk/manufacturers/glow-worm

  • Vaillant and Glow-worm are both part of the Vaillant Group, Europe’s second largest heating manufacturer, but when it comes to choosing the right manufacturer for you, their boiler ranges offer different advantages.

https://www.boilerguide.co.uk/articles/vaillant-glow-worm-boiler-comparison-reviews

  • Glow-Worm System Boiler Prices Range from 622.74 to £833.88 and are Exceptional Heating Performance. There are currently three Glow-Worm system boilers available on the market, all of which must work alongside a hot water cylinder.
  • In 2001 Glow-worm was acquired by the Vaillant Group, Europe’s second-largest heating company. Vaillant employs over 12,000 people across Europe and China, providing innovative heating, ventilation and air-conditioning technologies to hundreds and thousands of homes all over the world.

https://www.glow-worm.co.uk/about-us/about-glow-worm/

  • When you choose a Glow-worm combi boiler, you’re choosing the best for your home, and your family. We are a manufacturer of high-efficiency combi and condensing boilers. In fact, we developed the technology for the very first mass-produced condensing combi boiler in the 1990s.

https://www.glow-worm.co.uk/homeowner/products/boilers/combi-boilers/

Conclusion:

The Glow-Worm Ultimate3 System is a flexible boiler that comes with a choice of top or rear mounted flue to enable you more choice over where the unit can be installed. It has been built specifically to work with a cylinder to suit more demanding medium to large households in need of a constant supply of hot water.

There is only one heating output available, so it won’t be right for every home and is why you must get an engineer to assess your property and typical usage habits. You should also know that the unit is too big to be installed in a standard-size kitchen cupboard, so you’ll need an alternative storage space or cupboard if you prefer to keep your boiler hidden away.

We like the fact that the Ultimate3 System has a Grundfos modulating pump to help reduce the amount of energy you waste and boost money savings. The aluminium heat exchanger is also a nice component as it ensures the appliance continues to perform well. Obviously, the price is a selling point as well, making this model one of the best system boiler options if your budget is tight.

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