About
Offsite plant rooms from a commercial gas and heating team
Prefab Plant Systems is operated by Combicert Ltd, a Gas Safe registered commercial gas and heating company based in Telford, Shropshire.

Who we are
Combicert Ltd has worked on commercial gas and heating since 2019, led by director Peter Jefferson. Prefab Plant Systems brings that experience to offsite construction: plant rooms specified and drawn by the engineers who will connect, test and commission them.
We work with UK offsite fabrication workshops to build enclosures, frames and skids, while keeping responsibility for the specification, drawings, gas installation and commissioning. One point of contact runs the project from survey to handover.
How we work
- Engineering first: plant selected to the duty, not to a catalogue.
- Clear documents: drawings, schedules and test records clients can use.
- Safe gas work: Gas Safe registered business, number 621146, natural gas and LPG.
- UK-wide: based in Telford, delivering to sites across the UK.
| Trading name | Prefab Plant Systems |
|---|---|
| Legal entity | Combicert Ltd |
| Company number | 12155826 (England and Wales) |
| Registered office | The Old School House, Park Lane, Old Park, Telford, England, TF3 4TG |
| VAT | GB475322978 |
| Gas Safe | 621146 |
| Telephone | 07393 220694 |
| enquiries@prefabplant.systems |
Enquiries
Plant room on the drawing board?
Send the heat or cooling duty, the site and the programme. We will come back with the questions that matter and a route to a quotation.