
Boiler Installations For Commercial Spaces
Commercial boilers offer improved energy efficiency across the board to help future-proof your business against rising energy costs.
All commercial spaces should have a high-efficiency boiler that is adequately sized to deliver on the premises’ hot water and heating requirements. We complete commercial boiler installations for properties of all sizes, from large offices to boutique hotels, council-funded leisure centres, private care homes, schools and universities, and more.
A new modern and fully modulating commercial boiler is far more efficient than models that were installed 10 -15 years ago. With far greater efficiencies, they require less energy to run at optimal performance, reducing your overall running costs and energy bills.
Even if your old boiler isn’t breaking down, it’s unlikely to be working as effectively as it did when it was first installed. Old and obsolete boilers typically operate at an efficiency level between 50 and 70%. A new commercial boiler fitted by OKEL, on the other hand, can boast a gross efficiency of up to 99.3%.
Like most pieces of machinery that are used on a day-to-day basis, commercial boilers become worn down over time. Components deteriorate through overuse and the system becomes more prone to breakdowns. Often, the cost of installing a new commercial boiler can significantly outweigh the repair costs required by your old boiler, especially over the long term.

Why Choose OKEL for Commercial Boilers?

Every commercial space has its own unique heating and hot water requirements, which is why we offer a design and installation solution carefully tailored to meet those needs.
Our process begins with an on-site consultation to discuss what you need regarding heating, hot water and temperature control. We’ll perform a survey of your premises to ensure that all your needs are taken into consideration. From there, we’re able to design the ideal low-energy solution to provide optimal comfort levels in a cost-efficient manner.
We know how challenging and expensive heating commercial spaces can be, and with the rising cost of energy, it’s essential to consider running costs in our overall designs.
We understand the importance of a safe environment. When you’re serving the public, staff and visitors, you know you can count on OKEL. We know that you’ll want total confidence in our heating engineers, which is why our team is fully trained and qualified for the job and has years of experience installing commercial boilers across the UK.
By assigning your project to our team, you’ll be assured that all our lead commercial heating engineers are Gas Safe registered engineers and bring a minimum of 25 years’ experience to every job. In addition, they have a wealth of experience in heating commercial spaces. This means we’ll carefully plan the installation to ensure any loss of heat or hot water is minimal and that it’s carried out during agreed-upon times to ensure no impact on planned activities.

Our Commercial Boiler Installation Process
On-Site Consultation
One of our expert engineers will visit your site to perform a free survey and discuss your unique requirements to find the right boiler solution for you. They will be your point of contact throughout the installation process. At this stage, we will also take note of any existing HVAC systems already installed on the premises.
Solutions and Quotations
Based on our survey and your property’s needs, we’ll provide a custom design for an energy-efficient, cost-effective boiler heating system. Your project manager will then review the proposal and forecast how much it is likely to cost to be installed.
Pre-Installation Planning
Before installation begins, we perform detailed risk assessments and schedule the installation to minimise disruption as much as possible. We take the safety of our Gas Safe engineers and clients very seriously, which is reflected in our planning process, especially when it comes to electrical systems.
Installation
Our team of fully accredited and highly experienced engineers deliver a safe, reliable and streamlined installation for your new commercial boiler. The size of the building and complexity of the system will affect the time it takes to complete the installation.
Handover and Sign-Off
Once the new commercial boiler is installed, we provide training on your new system and ensure everything is working to your satisfaction.
Ongoing Aftercare
We offer full warranty protection as well as an annual maintenance service to keep your boiler working in top condition.

Frequently Asked Questions
- What is a Commercial Boiler?
A commercial boiler is a pressurised heating system that uses electricity or combustible fuel (depending on the model) to heat water for various applications in a commercial or industrial building. Any boiler that has a net energy input above 70kw is considered a commercial boiler.
- What Type of Commercial Boilers are Used at OKEL?
We design the perfect commercial boilers and hot water solutions for your place of work, each one optimised to deliver optimal energy efficiency. We use hydrogen-ready boilers, which can blend up to 30% hydrogen along with natural gas, reducing your running costs. These are the highest-efficiency commercial boilers available throughout Europe, consistently delivering up to 99.3% efficiency.
We install the very latest models from some of the leading manufacturers in the commercial boiler and hot water industry. These include:
- ATAG Commercial
- Rinnai
- Ideal
- Worcester Bosch Group
- Hamworthy
- Vaillant
- Baxi
We offer combi-boilers and system boilers, in both wall-mounted and floor-standing designs, depending on the needs of your system. All our models come with comprehensive manufacturer’s warranties as standard.
Your project manager will be able to recommend the right commercial boiler for your system once they have had their initial consultation with you.
- Who Can Benefit From a Commercial Boiler Installation?
Commercial boiler installations aren’t limited to large-scale commercial and industrial premises.
We have worked with numerous businesses and organisations, providing the same high-quality service to schools, colleges, and universities, as well as residential care homes, offices, sports and entertainment venues, hotels, leisure centres, public and government buildings, hospitals, medical centres, GP surgeries, and retail outlets.
If your property is too large for a domestic boiler to adequately heat, a commercial boiler installation may be the answer for you.
- How Long Does a Commercial Boiler Last For?
If you service it regularly and perform the appropriate maintenance, you can expect your commercial boiler to last anywhere from 10 to 15 years – perhaps even longer. For maximum efficiency, it’s generally advisable to replace any commercial boiler that has been in operation for longer than 15 years.
- How Much Does a Commercial Boiler Cost?
There are many variables involved in commercial boiler installations. Some businesses require a simple switching of one boiler for another whilst others involve ripping out an entire heating system and replacing it from scratch.
When you have your initial consultation, we will discuss what you want from your new commercial boiler installation and from there we will be able to produce an accurate quote for the work.
- What's the Difference Between a Combi Boiler and a System Boiler?
Although visually the 2 types of boiler systems appear very similar on the surface, they are in fact very different in terms of how they function and what they can achieve – a combi boiler for example is able to provide instant heating and hot water, however, this does mean that the amount of hot water it can produce is far less as it doesn’t have a separate cylinder to store hot water.
Whilst a system boiler works in conjunction with a hot water storage cylinder, it can store a vast amount of water and is more suited to larger premises or those with a greater demand for hot water supply.
- Who Installs Your Commercial Boilers?
Only Gas Safe-registered engineers qualified and accredited to work on commercial premises can install commercial boiler systems.
This ensures they have the necessary experience, training, and qualifications to choose the right boiler for your commercial premises and, most importantly, to provide you with a quality and safe installation.
Whilst some plumbers may be able to handle so-called “wet work” such as replacing traditional heating system pipes and radiators, the boiler itself should only be dealt with by an expert.
- How Long Does it Take for a Commercial Boiler to be Installed?
Depending on the extent of the project, a commercial boiler installation can take anything from a couple of days to a few weeks. We do all we can to plan any boiler installation around your business, to minimise any disruption for you, your staff, and your customers.






