From new commercial gas installations and pipework through to tightness testing, purging, decommissioning, planned maintenance and temporary heating, ComGas provides commercial gas services for offices, schools, care homes, retail premises and other commercial buildings across Surrey and surrounding counties, planned around how your site actually operates.
A commercial gas installation is more than a single appliance. Pipework has to be designed and routed correctly, new or altered installations need to be tightness tested and purged before they go into service, redundant pipework needs to be safely decommissioned, and buildings occasionally need a temporary heating arrangement while planned or reactive work is carried out. Each of these is a distinct piece of work with its own process, and getting the sequencing right matters as much as the individual task.
ComGas brings all of this together for commercial and industrial customers across Surrey and surrounding counties, working alongside our wider Commercial & Industrial services and our commercial boiler servicing and heating maintenance programme. Whether you need a specific piece of gas work carried out as a one-off, or want it considered as part of a broader project or maintenance relationship, the same team can scope it, explain the process and confirm what is required before anything is authorised. For the safety checks and written records your premises need, see commercial gas safety certificates.
ComGas Services UK Ltd
Commercial gas services from Farnham, Surrey.
Each service below has its own dedicated page covering scope, process and what to expect — explore the one relevant to your site, or get in touch and we can help identify the right starting point.
Design, installation and alteration of commercial gas pipework, from a single new appliance connection to a full plant room feed.
A standalone tightness (soundness) test on new, altered or existing commercial gas installations, carried out as its own piece of work or ahead of further gas work.
Safe purging of commercial gas installations before commissioning or after alteration works, removing air or redundant gas from the pipework as required.
Safe disconnection and capping of redundant commercial gas installations, often ahead of a refurbishment, strip-out or change of use.
Assessment and arrangement of a suitable temporary boiler where a site needs interim heating or hot water during a breakdown or planned works.
Broader interim heating co-ordination where more than a single hired boiler is needed — for example during a full plant replacement or extended works.
Planned. Professional. Practical.
Alongside installation, pipework, testing, purging, decommissioning and temporary heating, ComGas provides planned commercial gas servicing and maintenance: boilers, catering equipment and other gas appliances serviced at an agreed frequency, with findings documented after each visit and the relevant gas safety records issued for the work undertaken.
Where a piece of gas work forms part of a wider project — a new boiler installation, a plant room upgrade or a scheduled maintenance visit that identifies further work — the same team can bring it together, so pipework, testing, purging and any temporary arrangement are sequenced correctly around the main project.
Existing ComGas customers can use the Customer Portal to access relevant job and service information relating to commercial gas work carried out at their site. The functions and document visibility available depend on the account and contract configuration.
Portal access is for existing ComGas customers. Prospective customers can discuss portal options when scoping a piece of commercial gas work.
Education
Gas service alterations carried out alongside a plant room replacement, with new condensing boilers, a designed flue system and commissioning.
View project
Education
Gas-fired condensing boilers and a new flue installed at St James Primary School, Elstead, replacing a biomass boiler installation.
View projectGenuine reviews from ComGas customers, submitted through Google.
Rated 5.0 out of 5 from 75 Google reviews.
"Really happy with the service! Matt came out to carry out our boiler service and was friendly, professional and did a great job."
Kerryann, Google review, September 2026
"First time we've used this company and it won't be the last. Very professional and efficient in everything they do…"
Ian, Google review, June 2026
"…ended up coming to my place of work and sorting an old heating system that hadn't worked for years in a car showroom & workshop. Great team of guys"
James, Google review, October 2025
Common questions about commercial gas installation, pipework, testing, purging, maintenance and temporary heating.
Talk to the commercial gas teamIt depends on the work involved. New or altered pipework is normally followed by a tightness test and, where required, purging before an appliance is put back into service. If you are not sure which applies to your situation, describe the work you are planning and we can confirm the right sequence.
Yes. Where a refurbishment, strip-out or change of use means gas pipework or appliances are no longer required, we can safely disconnect and cap the redundant installation, sequenced around the wider project programme.
We can assess the site and discuss what temporary arrangement may be suitable, depending on the load, connections available and what has been agreed. Scope and availability always depend on a survey and the arrangements confirmed at the time — we do not guarantee stock, delivery timescales or continuity of supply in advance of that assessment.
Yes. Planned commercial boiler servicing and heating maintenance are covered in detail on our Commercial Heating & Boiler Maintenance page. Gas pipework inspections, tightness testing and any remedial gas work can be arranged within the same maintenance programme, so one team looks after the whole gas installation.
We work across a range of commercial and industrial buildings, including offices, retail premises, education settings, care and residential settings, and hospitality and leisure sites. Each piece of work is scoped to the specific site and installation rather than a standard template.
Yes. We design and install the gas installation from the meter to new boilers, catering equipment and other commercial appliances, then tightness test, purge and commission it before handover. Where a new or upgraded gas supply or meter is needed, that is provided by the gas transporter or meter operator, and we plan the internal installation around it.
Yes. ComGas Services UK Ltd is Gas Safe registered, registration number 629080, and commercial work is carried out by engineers qualified for the non-domestic gas work involved. Details of our registration are on our Gas Safe Register page.
Whether it is pipework, testing, purging, decommissioning or a temporary heating arrangement, share what you need and any access or timescale constraints. The team can advise on scope before any survey or quotation is arranged.
For an urgent enquiry, please call our office directly.
Current accreditations and registrations.
Message the ComGas office on 01252 214120.