Where a project spans plant rooms, mechanical installation, and coordination across gas, heating, plumbing and HVAC disciplines, ComGas provides mechanical services for offices, schools and commercial buildings across Surrey and surrounding counties — surveyed, specified and coordinated against an agreed scope.
Some commercial projects are naturally single-discipline — a boiler replacement, a pump installation, a ventilation upgrade. Others need several disciplines coordinated at once: a plant room refurbishment touching gas pipework, heating circuits, pumps and controls; a full mechanical installation for a new or refurbished building; or a wider commercial refurbishment where mechanical services need to be re-planned around a changed layout. Mechanical Services is the category we use for that cross-discipline work.
ComGas provides mechanical services for offices, schools, retail developments and other commercial buildings across Surrey and surrounding counties, coordinating our own gas, heating and plumbing teams and, where your project already has an appointed consultant or design team, coordinating installation against their design rather than duplicating it. Where no separate design exists, we specify the mechanical installation within the scope agreed with you.
Our plant rooms page covers multi-discipline plant room design, installation and refurbishment. Each discipline has its own page too: commercial heating, commercial boiler replacement, commercial plumbing, HVAC and building management systems, with planned preventative maintenance once the work is handed over. Full mechanical installations, design input, upgrades and commercial refurbishments sit within the same scope. Tell us about the project and we will confirm how it is scoped.
ComGas Services UK Ltd
Mechanical services from Farnham, Surrey.
A mechanical project draws on several disciplines. Plant rooms, gas, heating, boiler replacement, plumbing, HVAC, building controls and planned maintenance each have their own page below.
Multi-discipline plant room design input, installation and refurbishment, coordinating mechanical, electrical and controls trades.
Gas installation, pipework, tightness testing, purging and maintenance, carried out under our Gas Safe registration, number 629080.
Heating controls, pressurisation units and wider heating system support for commercial buildings.
Boiler plant replaced from survey and design through temporary heating, commissioning and handover records.
Pipework, hot and cold water, pumps and drainage for offices, schools and commercial buildings.
Air handling units, chillers, ventilation and air conditioning designed, installed and serviced.
BMS installation, upgrades and maintenance for heating, HVAC and plant room controls.
Maintenance programmes for gas, heating, plumbing, electrical and HVAC plant, with the scope and visit frequency agreed before the schedule starts.
Planned. Professional. Practical.
A multi-discipline mechanical project starts the same way as a single-discipline one — with a survey of the existing installation and a clear scope agreed with you. What changes is the coordination: gas, heating, plumbing, electrical and controls trades all need to be sequenced correctly, particularly in a plant room where several systems share the same space and, often, the same shutdown window.
Where your project already has an appointed consultant, architect or M&E designer, we coordinate installation against their design and specification. Where no separate design team is involved, we specify the mechanical installation within the scope you agree with us, rather than assuming open-ended design responsibility across the whole project. Either way, the same team stays involved from survey through to handover, so nothing is lost between disciplines.
Existing ComGas customers can use the Customer Portal to access relevant job and service information relating to mechanical services 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 mechanical services work.
Care & Healthcare
Cascade boiler plant replaced at a Farnham care home in a single week, with heating and hot water maintained for residents throughout.
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Education
Whole-school heating distribution refurbishment: new LTHW pipework, radiators and plantroom alterations at Loseley Fields Primary School, Godalming.
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Education
Six-week plant room rebuild at Our Lady of The Rosary School, Staines, covering boilers, flue, ventilation, electrical distribution and controls.
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 scope, coordination and what to expect from a mechanical services project.
Talk to the mechanical services teamGenerally, any project where more than one discipline — gas, heating, plumbing, electrical or controls — needs coordinating together, such as a plant room refurbishment or a full mechanical installation for a refurbished building.
Both are possible. Where your own consultant or design team has already produced a specification, we coordinate installation against it. Where there is no separate design, we specify the mechanical installation within the scope agreed with you.
Yes. Each discipline has its own page: plant rooms, commercial heating, commercial boiler replacement, commercial plumbing, HVAC, building management systems and planned preventative maintenance. Full mechanical installations, design input, upgrades and commercial refurbishments are part of the same scope. Get in touch and we can confirm how your project is scoped.
Yes. Where a project already has an appointed consultant, architect or principal contractor, we coordinate our mechanical scope with theirs rather than working in isolation.
We plan the shutdown and sequencing across all trades involved as one programme, agreed with you in advance, so gas, heating, plumbing, electrical and controls work is coordinated rather than causing repeated separate periods of disruption.
A quotation sets out the agreed scope of work following our site survey across all disciplines involved. Anything outside that agreed scope is separately discussed before it is added to the project.
Tell us about the building, the disciplines involved, and any existing consultant or design team. We can advise on the right approach and arrange a site survey where appropriate.
For an urgent enquiry, please call our office directly.
Current accreditations and registrations.
Message the ComGas office on 01252 214120.