Vaillant
Vaillant commercial boiler installation, replacement and servicing. Explore ecoTEC plus and cascade options with Oxyplumb Commercial.
Explore Vaillant boilersOxyplumb Commercial · Oxfordshire
Commercial boiler installation in Oxfordshire
Replacing a commercial boiler can feel like a big job. We can help you choose a suitable system and plan the work around your school, workplace or business premises in Oxfordshire.
- Single, twin and cascade boiler arrangements
- Natural gas, oil and LPG installations
- Pumps, flues, controls and connected pipework
- Installation, commissioning and ongoing servicing
Installation & ongoing care
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Explore Ideal boilersA replacement designed around the complete heating system
We start with what your building needs, not just the model written on the old boiler. Together, we can look at the heating demand, available space and connected equipment to work out a sensible replacement.
- Single, twin and cascade arrangements matched to the building and proposed work.
- Existing gas or oil supply, flue route, ventilation and condensate arrangements.
- Pumps, controls, hydraulic separation, filtration and connected pipework where required.
- Access for installation and future servicing, commissioning and handover.
Working around schools and business operations
Tell us when heating and hot water can be interrupted and whether other contractors are involved. At LTI Metaltech the Oxyplumb Commercial team installed twin Vaillant boilers on a custom frame around occupied offices. At Carterton Town Hall, replacement work included hydraulic separation and changes to the connected system.
Before you arrange the work
Can you quote from a photograph of the existing boiler?
Yes, photos are a helpful place to start. We may also need to visit to check the layout, access and connections before confirming a quotation. Send what you have and we will explain what else is needed.
Why choose two boilers or a cascade arrangement?
Multiple appliances can be considered where the building’s heat demand and operating pattern make them suitable. The existing system, controls, space and proposed design determine the arrangement; more boilers are not automatically the right answer.
What needs to be included in the handover?
Agree the commissioning information, operating guidance and maintenance requirements for the installed equipment as part of the proposal. Identify who will operate the system and how the new plant connects with existing controls.
Related commercial projects
LTI Metaltech, Milton Park
Two Vaillant ecoTEC Plus 64 kW boilers, a custom cascade frame and hydraulic separation for occupied offices.
View the project
Carterton Town Hall
A failing boiler replaced with a Vaillant ecoTEC plus 48 kW, hydraulic separation and associated pipework.
View the projectRelated support: Plant-room upgrades · Planned heating maintenance.
How we work
Plan the whole installation.
A boiler replacement needs more than an equipment choice. We review the connected plant, site access and building use, then agree any heating interruptions before work begins.
View the LTI Metaltech project- 01
Survey the existing system
Talk through the building’s heating needs, existing plant and available access.
- 02
Agree the proposal
Set out the equipment, associated work and project arrangements in your quotation.
- 03
Coordinate the installation
Agree access and shutdown arrangements with the people responsible for the site.
Installation range
Different buildings need different plant.
Examples from Oxyplumb commercial installations, from twin floor-standing appliances to wall-hung cascades and complete boiler manifolds.
Useful to know
Your questions.
Can you replace a boiler in an occupied building?
We discuss how the premises operate and agree access and any required shutdowns before arranging the work. Let us know about term dates, guest use or other restrictions at the enquiry stage.
Do you work with gas, oil and LPG systems?
We undertake commercial boiler work across gas, oil and LPG. Send us the details of your existing installation so we can discuss the appropriate next step.
What should I send with an enquiry?
The site address, a brief description of the work and photographs of the boiler and plant room are a useful starting point. Include any drawings or previous service records you already have.
Planning the installation
The applicable requirements depend on the appliances, fuel, flue arrangement and building. BS 6644 addresses installation and maintenance of gas-fired hot-water boilers within its defined scope; IGEM/UP/10 addresses flued gas appliances in industrial and commercial premises. Applicability must be assessed for each project alongside the manufacturer’s instructions.
Leigh Sackett completed Ideal Commercial Evomax 2 training on 18 March 2025.
Independent customer feedback
Hundreds of five-star reviews. See for yourself.
You want to feel comfortable with the people working in your building. Take a look at Oxyplumb’s independent customer feedback, then tell our commercial team how we can help.
Public Google profile
Google Reviews
4.9/5
from 311 reviews
Verified customer reviews
Which? Trusted Traders
4.9/5
from 260 reviews
99% of customers recommend Oxyplumb on the official profile.
Google and Which? rating figures checked on 21 October 2026.
YOUR NEXT STEP
Let’s talk about your building.
Speak to our commercial team about your site and the work you need.
Oxfordshire & the Cotswolds
A boiler upgrade planned around your premises
We help organisations across Oxfordshire and the Cotswolds replace ageing boilers and plan new heating systems. A school in Abingdon and a business in Witney may need very different changeover arrangements; we’ll work through yours before agreeing the programme.
Where we can help
Let’s talk about your building
Not sure where to start?
Send photographs of the boiler room, your postcode and any dates when heating must remain available.
Discuss your local projectCompleted Oxyplumb work
A completed boiler upgrade in Carterton
See the Vaillant boiler replacement and hydraulic separation at Carterton Town Hall.
Read the project story