Mechanical Commissioning Engineers for Surrey and London
Commissioning is the stage where WTS Plumbing & Heating Ltd proves that the mechanical and public health systems it has installed, from heating and ventilation (HVAC) to hot and cold water, do what the design says they should. It is the last thing we do on a project and the part a client relies on for years afterwards. From our office at Jayes Park Courtyard in Ockley, about seven miles south of Dorking on the A29, we commission heating, chilled water, ventilation, hot and cold water, above-ground drainage and heat pump systems in commercial buildings in Surrey and London. That covers offices, schools and care settings around Dorking, Reigate, Leatherhead and Epsom, and mechanical installations for contractors and end clients in Central London, including Cabot Square, Cannon Street and Moor House Level 9.
Our Five-Stage Commissioning Process
Every installation we commission follows the same five-stage plan, so a client and their consultant can see where a system is at any point without having to ask. The stages run from pre-commissioning checks, with pipework flushed and cleaned, pressure tested and plant labelled and powered, through setting to work, balancing and performance testing, to witnessed demonstrations and handover. Each stage has its own checklist and sign-off, and nothing moves to the next stage until the last one is closed. The result is a dated, signed record of every test and inspection rather than a single certificate produced at the end.
Test Records and Handover Documentation
At handover we issue a pack that records what was installed, how it was tested and what the results were: pressure test certificates, flushing and water quality results, flow balancing sheets for heating and chilled water, hot and cold water temperature logs, ventilation air volumes, controls checks and the manufacturer literature for every item of plant. Gas work is signed off by our Gas Safe registered engineers; ask us for our Gas Safe registration number and check it on the Gas Safe Register before work starts. The pack shows the systems were built and set up to the design and the standards it references, and it is the document a facilities team reaches for when something needs checking two years later.
Handing Over to Facilities Management Teams
A building only performs if the people running it know how the plant is meant to work. Before we leave a site we walk the facilities or maintenance team through each system: where the isolation valves and strainers are, what the controls are set to and why, what the alarms mean, and what needs checking weekly, monthly and yearly. We do this in the plant room with the equipment in front of us, and we leave the settings and set-points written down in the handover pack. For clients in Surrey the engineers who did the work are based at Ockley near Dorking, so a question after handover is answered by someone who was on the job.
Recommissioning Existing Buildings
Systems drift. Pump speeds get turned up to cure one cold room, valves get left open after a repair, time schedules stop matching how the building is used, and a few years on the heating runs harder and costs more than it did on day one. WTS recommissions existing heating, chilled water, ventilation and hot water systems in occupied commercial buildings. We survey what is there, compare it with the original design where records exist, re-balance, re-set the controls and report what we found and what we changed. It suits the older office, school and leisure buildings around Dorking, Reigate, Epsom and Banstead, and London floors where a fit-out has changed how the space is used.
Working to CIBSE and BSRIA Guidance
Our commissioning follows the CIBSE Commissioning Codes and BSRIA guidance, including the BSRIA application guides for pre-commission cleaning and water system balancing, together with the British Standards the design references. Results are recorded against the design figures with tolerances stated, so a consultant or clerk of works can carry out witness testing and see at once whether the system passes. Where a result falls outside tolerance we say so, find the cause and put it right before sign-off, rather than noting it and moving on.
What our commissioning service covers:
- Five-stage commissioning of mechanical and public health systems
- Pre-commissioning checks, flushing and pressure testing
- Flow balancing and performance testing of heating, chilled water and ventilation
- Handover packs with test sheets, certificates and operating and maintenance manuals
- Plant room demonstrations and training for facilities teams
- Recommissioning of existing systems in occupied buildings
- Energy performance checks and control set-point adjustment
- Work carried out to CIBSE, BSRIA and British Standards guidance
The Last Step Before a Building Goes to Work
Commissioning is where a project either proves itself or does not. WTS Plumbing & Heating Ltd was established in 2008 and works for private households, landlords, construction companies and tier-one contractors, on projects such as Moonbug Camden Lock, Kew Gardens and Voysey House. On every one of them the aim is the same: a building whose heating, water, drainage and ventilation work as designed on the first day of occupation, with the paperwork to show it. The client gets a building that is ready to use, and the facilities team gets a record they can trust.
Contact WTS Plumbing & Heating Ltd today to talk about commissioning, recommissioning or performance testing for a commercial building in Surrey or London. Call the Ockley office on 01306 621 057 or email info@wtsmechanical.co.uk.
Commercial services by town
Commissioning is the final stage of the mechanical and public health work WTS does for commercial clients, and most of that work is close to home. From Ockley, about seven miles south of Dorking on the A29, we cover the commercial buildings of Dorking, Reigate, Epsom, Banstead and Cheam, with Putney and Central London on request. The pages below explain what we do for commercial clients in each town, from plant room installations to boiler servicing contracts, all handed over with the test records described on this page.
DorkingCommercial boiler installation in DorkingCommercial boiler repairs in DorkingCommercial boiler servicing in DorkingCommercial plumbers in Dorking
ReigateCommercial plumbers in Reigate
EpsomCommercial boiler installation in EpsomCommercial boiler repairs in EpsomCommercial boiler servicing in EpsomCommercial plumbers in Epsom
BansteadCommercial boiler installation in BansteadCommercial boiler repairs in BansteadCommercial boiler servicing in BansteadCommercial plumbers in Banstead
CheamCommercial boiler installation in CheamCommercial boiler repairs in CheamCommercial boiler servicing in CheamCommercial plumbers in Cheam
PutneyCommercial boiler installation in PutneyCommercial boiler repairs in PutneyCommercial boiler servicing in Putney
Questions we are asked about commissioning
It is the process of setting a newly installed system to work and proving it performs to the design. For WTS that means five stages: pre-commissioning checks such as flushing and pressure testing, setting plant to work, balancing flows and air volumes, performance testing against the design figures, and a witnessed demonstration with a full handover pack. Each stage is signed off before the next begins.
Heating, chilled water, ventilation, hot and cold water services, above-ground drainage, air source heat pumps and the controls that run them. These are the mechanical and public health systems WTS installs for commercial clients, so the engineers commissioning them are usually the ones who fitted them.
Surrey first, from our office at Jayes Park Courtyard in Ockley, about seven miles south of Dorking on the A29. That puts commercial buildings in Dorking, Reigate, Leatherhead, Ashtead, Epsom, Banstead, Cheam and Cranleigh within a normal working radius. We also work for main contractors in London, where our named projects include Cabot Square, Cannon Street, Moor House Level 9, Voysey House, Kew Gardens and Moonbug Camden Lock.
Everything needed to show the systems were installed and set up to the design: pressure test certificates, flushing and water quality results, balancing sheets, temperature and air volume logs, controls checks, gas safety paperwork where relevant, and manufacturer operating and maintenance literature for each item of plant. Settings and set-points are written down so the facilities team can restore them if they are changed later.
Yes. WTS recommissions heating, chilled water, ventilation and hot water systems in occupied commercial buildings. We survey the installed system, compare it with the original design where records exist, re-balance the water and air sides, re-set the controls and time schedules, and issue a report on what we found and changed. It is often the quickest way to cut running costs in an older building without replacing plant.
Yes. WTS commissions to the CIBSE Commissioning Codes and BSRIA guidance, and records every result against the design figure with a stated tolerance. A consultant or clerk of works can witness any test; anything outside tolerance is corrected before sign-off.