Commercial boilers

Commercial boilers are an often overlooked essential for office managers, owners or agents. Find out about the best options now and compare quotes

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Written and reviewed by:
Bryn Glover - Startups

Choosing a commercial boiler is no easy task, and it’s certainly not a decision that should be taken lightly. This is a significant investment and it’s vital that you choose a boiler that will offer the optimum standard of performance, efficiency, reliability, and safety for your commercial environment.

In this article, we’ll take a look at various leading commercial boiler suppliers and their leading products, as well as the variety of commercial boiler installation, service, repair, and maintenance services that you need to be aware of.

Commercial Boiler Suppliers

There is a wide range of commercial boilers on the market and, with so many things to consider, it can be difficult to choose between them.

When choosing a commercial boiler, you should consider factors such as energy efficiency, whole life costing, ease of installation, the availability of replacement parts, warranties, and technical support.

It’s also important that you look at the supplier’s services, costs, and products, as well as their reputation and any reviews you can find online.

Here’s a brief look at some of the industry’s leading commercial boiler suppliers:

Ideal commercial boilers

Ideal commercial boilers
The UK’s market leader for high efficiency, commercial heating solutions, Ideal Commercial Boilers was founded in 1906 in their current factory in Hull.

With a firm focus on quality and experience, all of Ideal’s condensing commercial boilers have been specifically developed with the distinctive features of UK installations in mind.

All Ideal Commercial boilers also conform to all aspects of ErP regulation and qualify for maximum BREEAM points. The majority of the brand’s boilers are also listed on the Energy Technology List, making them eligible for tax relief.

Let’s take a look at some of Ideal’s leading commercial boilers:

Ideal Vogue System 32

Ideal Vogue System 32
Typically priced around £1,205.00, the Ideal Vogue System 32 is the largest in the Vogue system range. Utilising the very latest in boiler technology and featuring premium parts and components, this boiler delivers epitomises domestic heating intelligence.

This combi-boiler is easy to use with its clear, colour display and large, smart controls.

This model also comes complete with a 10-year warranty covering both parts and labour, for total peace of mind.

Key features and benefits:

  • Up to 7:1 modulation
  • Backlit 3.5” LCD colour display
  • Compact design
  • Low lift weight
  • Frost protection
  • Easy to read pressure gauge
  • Cool burner door technology
  • NOX class 5

Ideal Logic+Combi

Ideal Logic+Combi
Ideal’s Logic+ Combi range of commercial boilers is a great choice for a new or replacement boiler, providing excellent energy savings wrapped up in a compact design that is small enough to fit in a standard kitchen cupboard.

The Logic+ Combi is also one of the only boilers in the UK to have been issued Quiet Mark accreditation for its quiet performance.

The boilers in this range come complete with a 7 year parts and labour warranty and a 10 year warranty on the hear exchanger.

Key features and benefits:

  • Made in the UK
  • Compact cupboard fit
  • Fully back lit LCD display
  • LPG conversion available for 30KW
  • Built-in frost protection
  • Energy Saving Trust endorsed
  • Quiet Mark
  • Queen’s Award 2013
  • Good Housekeeping awards in 2013 and 2017

Ideal Mexico HE

Ideal Mexico HE
The perfect solution for replacement installations, the Mexico HE floor standing boiler offers compact design, minimal maintenance, and low running costs.

Proven to deliver years of excellent efficiency, this is the ideal model if you’re looking for a direct replacement for your existing floor standing boiler, with a larger output.

Key features and benefits include:

  • 2 year parts and labour warranty
  • Compact, floor-standing design
  • Optional remote user kit
  • Range of outputs available
  • User friendly status display, featuring temperature control and diagnostics
  • Energy Saving Trust endorsed

Hamworthy commercial boiler

Hamworthy commercial boilers
With decades of experience, Hamworthy are experts in commercial heating services – making, selling, and servicing boilers and water heaters for a huge range of businesses around the UK.

Hamworthy provide a wide variety of commercial boiler systems, including wall hung boilers and floor standing boilers.

From hotels, and hospitals, through to district heating schemes, and even cathedrals, the team at Hamworthy are fully equipped to help you find the best commercial boiler solution for your project.

Let’s take a look at some of Hamworthy’s leading commercial boilers:

Wessex ModuMax mk3 Boiler

Wessex ModuMax mk3
The Wessex ModuMax mk3 boiler lends itself perfectly for use within new build projects, rooftop and basement plant rooms, large commercial and public buildings, including schools, hospitals, and hotels, or as an easy fit replacement for refurbishment projects.

This fully modulating boiler boasts low fuel usage and closer load matching.

Great for commercial environments where space is limited, the Wessex ModuMax delivers 762kW in less than a square meter footprint, thanks to its space-saving stacked module design.

Key features and benefits include:

  • Up to 95% gross seasonal efficiency
  • Up to 15:1 turndown
  • 10 year heat exchanger warranty
  • ErP Part L compliant
  • Low environmental impact
  • Fits through a standard doorway
  • Low water content and rapid response
  • High relative velocity within the waterways to reduce opportunity for sedimentation

Ensbury LT Boiler

Ensbury LT Boiler
The Ensbury LT Boiler is a low temperature, high efficiency, floor-standing boiler available in 14 different models with varying outputs, ranging from 70 to 580kW.

This high performance boiler is ideal for use in new build projects, large commercial and public buildings including schools, offices, and hotels, medium sized commercial and public buildings, and rural locations without access to mains gas supply.

Suitable for use with liquid biofuel, this boiler is also a great option for customers looking for a renewable energy choice. Other fuel options include natural gas, LPG (propane), and oil.

Key features and benefits include:

  • Operating efficiencies of up to 95% net (86% gross) at part load
  • Suitable for use on open vented or sealed low temperature hot water heating systems
  • Robust three-pass heat exchanger design that helps to achieve European Class 5 performance for NOx emissions
  • Up to 3:1 turndown
  • 2 Year Warranty

Stratton mk2 Wall Hung Boiler

Stratton mk2 Wall Hung Boiler
The Stratton mk2 Wall Hung Boiler is a wall hung, condensing commercial boiler with a stainless steel heat exchanger.

This boiler is available in a wide range of outputs, from 43 through to 146kW, allowing you to specify the best wall hung boiler model for your commercial heating system.

Designed for use in sealed systems only, this commercial boiler provides optimum efficiency in a variety of applications, including new build and retrofit projects, smaller commercial and public buildings, and small industrial and manufacturing premises.

Key features and benefits include:

  • Accurate load matching with a high turndown ratio and fully modulating performance
  • Integrated sequence control for multiple boilers
  • Low height – less than 2.2 meters
  • Meet the energy saving criteria for the Government’s Energy Technology List (ETL) allowing for purchase through the Enhances Capital Allowances Scheme
  • Quick and easy installation

Viessmann commercial boiler

Viessman commercial boilers
Viessmann is an internationally leading commercial boiler manufacturer.

The brand’s comprehensive product range includes commercial boiler systems, commercial heating systems, and energy systems for the economic provision of steam, refrigeration, and power in commercial and industrial applications.

All of Viessmann’s commercial boilers offer excellent reliability and a long service life, calling upon premium components and advanced engineering expertise gained over 100 years in producing heating systems.

Let’s take a look at some of Viessmann’s leading commercial boilers:

Viessmann Vitocrossal 300 CT3 Boiler

Veissmann Vitocrossal 300 CT3 Boiler
The Viessmann Vitocrossal 300 CT3 Boiler is a gas fired, condensing boiler for natural gas E, LL, and LPG, with a modulating Matrix radiant burner up to 314kW.

Constructed using only the highest quality materials and components, the Vitocrossal 300 CT3 is built to last. Corrosive condensate simply drains downward off the boiler’s smooth surfaces, effectively self-cleaning the heat exchanger and optimising the lifespan of the boiler, as well as reducing maintenance costs.

Key features and benefits:

  • Efficiency up to 98%
  • Stainless steel, corrosion-resistant Inox-Crossal heating surface for optimum reliability and durability
  • Inox-Crossal heating surface for highly effective heat transfer and high condensation rate
  • Self cleaning effect
  • Clean combustion
  • Easy transport into boiler rooms
  • Safe heat transfer

Viessmann Vitorond 200

Viessmann Vitorond 200
The Viessmann Vitorond 200 is a reliable, durable, and efficient commercial heating solution.

This oil/gas fired, sectional cast iron hot water heating boiler, features a sectional, triple-pass design, which combined with a special Eutectoplex heat exchanger surface, ensures easy installation, economical energy consumption, high operational reliability, and a long service life.

Key Features and benefits include:

  • Efficient and reliable operation
  • Combustion efficiency – 85% for gas and 88% for oil
  • Sectional construction and low weight
  • Quick and easy installation
  • Low-emission combustion and low environmental impact
  • Easy cleaning
  • Consistent and reliable DHW supply
  • Standardised LON-BUS
  • Quality assurance

Vitodens 200-W Cascade Systems

Vitodens 200 W Cascade Systems
The Vitodens 200-W Cascade Boiler System offers industry-leading condensing technology for commercial projects, with a high performance 200W multiple boiler system.

This advanced digital boiler and system control with outdoor reset function ensures the reliable and efficient performance of a cascade system. As many
as 8 Vitodens 200-W gas fired condensing boilers can be combined in a single, prefabricated cascade system in line with your requirements.

Key features and benefits include:

  • Maximum efficiency with high turndown that matches load precisely
  • Simplified boiler system layout
  • Multiple boilers secure against interruption of heating plant operation
  • Flexible installation with multiple manifold configurations
  • Ideal for small or difficult to access boiler rooms or facilities
  • All serviceable components easily accessible from the front

British Gas commercial boiler

British Gas don’t supply their own boilers, though are still on the of the leading companies in the UK. It is likely that many businesses will want to use British Gas for some of their services. It is important to remember though, that reputation is not always the most important thing. Working with smaller, less heard of suppliers can often be the best decision.

Commercial Boiler Services

To ensure that your commercial boiler performs to optimum capacity and remains safe for both customers and employees, it’s important to keep it well maintained at all times. After all, prevention is better than cure!

A commercial boiler service will not only ensure that your boiler is performing at optimum efficiency all year round, but regular services will also ensure that your systems are robust, resilient, and fully operational when you need them most – reducing the likelihood of catastrophic failures and the associated repair costs.

Your commercial service should be conducted on an annual basis, by an approved, Gas Safe engineer.

Many boiler service providers offer service plans, which covers the necessary services, as well as the production of a safety record. Service plans are worth considering as they can allow you to enjoy reduced labour costs as well as exclusive emergency access. Some plans also include maintenance costs, which can significantly reduce the fees involved in repairing your boiler if things go wrong.

Commercial boiler installers

A commercial boiler must have always been professionally installed by an approved and experienced engineer.

There is a wide range of commercial boiler installers to choose from, so it’s important to do your research and select an installer that meets your specific requirements.

Commercial boiler installers typically offer two options: installation, and supply and installation.

Of course, before having your boiler installed, you need to check that your chosen engineer is Gas Safe registered. The Gas Safe Register is an official list of businesses that are legally allowed to carry out gas work. You should check that the installer’s business is Gas Safe approved by searching the register online. In addition to this, you should also ask to see the engineer’s Gas Safe ID card. If you have any doubts, their individual licence number can also be checked online.

As well as being Gas Safe registered, when you’re having a commercial boiler installed, the engineer carrying out the work should also be qualified and authorised to work with commercial boilers.

Commercial boiler repair

Although having regular services on your boiler should keep it in full working order for as long as possible, it’s only natural that, from time to time, problems will arise. When this happens, you will need to contact a specialist boiler repairs provider to diagnose and rectify the problem.

When an engineer visits to diagnose and repair your boiler, they will typically try their best to repair it during the visit and get you back up and running as quickly as possible. However, depending on the issue, the equipment, and the parts required, they might have to wait complete the work at a later date.

The majority of companies will charge an initial call out fee, and then an hourly rate on top of that. You will also typically have to pay for any new parts that are needed for the repair.

And, because problems can occur at any time, many providers offer a 24/7, 365 emergency boiler repair service to ensure their clients are back up and running as quickly as possible, with minimum disruption to their business.

Of course, whenever you have your commercial boiler, or any gas based equipment repaired, it’s important to ensure that the work is carried out by an approved Gas Safe engineer with the right qualifications to work on your commercial boiler.

You should also look out for repair service providers that use genuine parts from your boiler’s manufacturer.

Commercial boiler replacement

Whether your existing boiler is on its last legs, or it simply doesn’t meet your needs any more, a replacement boiler could be the most efficient, effective, and reliable option.

When you contact a company to replace your commercial boiler, they will usually arrange an initial visit in order to look at your existing system, allowing them to identifying what sort of replacement boiler will work best for your requirements.

This site survey will typically take around 90 minutes – allowing the engineer to get a good understanding of your business’ heating and hot water requirements, as well as checking your existing boiler.

Your engineer should then go through the various different options available to you and, at this point, should supply a quote to give you an idea of the costs that are likely to be involved. When choosing a replacement boiler, ensure that it is an energy efficient model from a leading and reputable manufacturer.

Once the replacement boiler has been chosen, a skilled, experienced, and trained engineer will install your new boiler. Many installers also provide an aftercare or maintenance service and this is certainly something that’s worth looking into.

As with any gas-related service, when you’re choosing an engineer to replace your boiler, it’s important to ensure that they are Gas Safe registered to commercial level. This way, you can rest assured that your commercial boiler is being replaced by a fully qualified contractor who is operating within the law.

Compare commercial boiler quotes

The information on this page should help you to understand what your business may need to look for in a commercial boiler. We have provided information about various things, including the products you might need, the services available as well as maintenance options. For more tailored information though, you should speak to suppliers today – Startups can help with this.

To compare quotes from top UK commercial boiler suppliers and installers, simply complete the form at the top of this page. This process is free, quick and easy, and it could save your business both time and money.

Written by:
Bryn Glover - Startups
Bryn Glover has been Editor of since 2017. Running the site's content strategy, Bryn spends a lot of time speaking to entrepreneurs and preparing for Startups' annual editorial campaigns. Having worked in journalism for just under a decade, Bryn wrote for sites like The Times, Reader's Digest, Independent and Times Higher Education before moving into the small business world.
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