Plant room
A plant room, (sometimes referred to as a mechanical room or boiler room), is a dedicated space containing the equipment required to provide or supply building services such as; ventilation, electrical distribution, water and so on.
The size of a plant room is generally proportional to the size and type of building. Large buildings may have several plant rooms, or spaces that occupy one or more storeys and some plant rooms may have specific functions, such as; battery rooms, transformer rooms boiler rooms and so on.
Depending on the size of the building and the nature and complexity of the building services required, plant rooms may contain (amongst other things):
- Air handling units.
- Boilers and thermostats.
- Chillers and refrigeration units.
- Heat exchangers.
- Water heaters and tanks.
- Water pumps and pipework.
- Gas pipework.
- Sprinkler distribution piping and pumps.
- Electrical equipment and control panels
- Back-up electrical generators and compressors.
- Switch gear.
- Batteries.
- ITC systems.
- Machinery for lifts.
- Humidifiers.
- Ducts and filters.
- Other heating, ventilation and air-conditioning (HVAC) equipment.
- Specialist equipment for swimming pools, laboratories, factories and so on.
Plant room equipment may be linked to a Building Automation and Control System (BACS).
When designing a plant room, the following points should be considered:
- The ease of access for the maintenance and/or replacement of equipment when locating a plant room.
- The ability to expand if required in the future.
- The ability to expand the equipment in the room if required.
- Ventilation requirements.
- Where the plant is located externally and may be in view, screening devices may be required.
- Floors should be low maintenance finish and comply with slip resistance standards.
- Access should be restricted to authorised maintenance personnel.
- Sound transmission should be minimised with acoustic attenuation if in close proximity to user rooms/spaces.
[edit] Find out more
[edit] Related articles on Designing Buildings Wiki
- Ancillary area.
- Building Automation and Control System BACS.
- Building management systems.
- Building services.
- Building services engineer.
- Concept services design.
- Cooling systems for buildings.
- Ductwork.
- Electrical control systems.
- Equipment installed in buildings.
- Industrial plant and construction operations.
- HVAC.
- Mechanical, electrical and plumbing MEP.
- Types of building services.
Featured articles and news
Costs and insolvencies mount for SMEs, despite growth
Construction sector under insolvency and wage bill pressure in part linked to National Insurance, says report.
The place for vitrified clay pipes in modern infrastructure
Why vitrified clay pipes are reclaiming their role in built projects.
Research by construction PR consultancy LMC published.
Roles and responsibilities of domestic clients
ACA Safety in Construction guide for domestic clients.
Fire door compliance in UK commercial buildings
Architect and manufacturer gives their low down.
Plumbing and heating for sustainability in new properties
Technical Engineer runs through changes in regulations, innovations in materials, and product systems.
Awareness of the Carbon Border Adjustment Mechanism
What CBAM is and what to do about it.
The new towns and strategic environmental assessments
12 locations of the New Towns Taskforce reduced to 7 within the new towns draft programme and open consultation.
Buildings that changed the future of architecture. Book review.
The Sustainability Pathfinder© Handbook
Built environment agency launches free Pathfinder© tool to help businesses progress sustainability strategies.
Government outcome to the late payment consultation, ECA reacts.
IHBC 2025 Gus Astley Student Award winners
Work on the role of hewing in UK historic conservation a win for Jack Parker of Oxford Brookes University.
Future Homes Building Standards and plug-in solar
Parts F and L amendments, the availability of solar panels and industry responses.
How later living housing can help solve the housing crisis
Unlocking homes, unlocking lives.
Preparing safety case reports for HRBs under the BSA
A new practical guide to preparing structural inputs for safety cases and safety case reports published by IStructE.
Male construction workers and prostate cancer
CIOB and Prostate Cancer UK encourage awareness of prostate cancer risks, and what to do about it.





















