Commercial Gas Engineers Southern Ltd provide specialist commercial gas services to businesses in Portsmouth and the surrounding areas.

Our engineers are regularly vetted, allowing them to work in a wide range of sensitive environments such as schools and nursing homes.

All of our gas engineers are highly trained and Gas Safe registered. We operate throughout the year and offer ad hoc services as well as regular maintenance services.

We put our clients at the forefront of all work, ensuring each project is completed to the highest of standards.


Our Portsmouth-based DBS checked staff are cleared to work in a variety of educational establishments including schools and universities

Nursing Homes

We understand the importance of keeping nursing homes and hospitals safe and warm. Contact us for information on how we can help

Shopping Centres

From retail outlets to multi-floor shopping complexes, you can have total confidence in our gas specialists

Commercial Gas Engineers in Portsmouth

Air Conditioning

CGE Southern are a leading provider of air conditioning services, proudly holding FGAS accreditation with Refcom. We specialise in the design and installation of high-efficiency air conditioning systems tailored to meet the unique needs of our clients.

Our comprehensive range of services includes expert installation, reliable servicing, prompt breakdown assistance, and thorough maintenance. At CGE Southern, we are committed to delivering top-quality solutions that ensure optimal performance and comfort for both residential and commercial spaces. Trust our experienced team to keep your environment perfectly conditioned year-round.

Tightness Testing and Purging

CGE Southern specialises in tightness testing and purging, from routine tightness testing and purging to decommissioning systems, capping off and making safe. We can test and purge gas installation pipework exceeding 1M3 in volume and anything up to it. All jobs are entirely risk-assessed, and we will provide certification on completion.

Boiler Installations and Plant Room Upgrades

Passionate about optimising energy efficiency and enhancing operational performance, we are your trusted experts in boiler installations and plant room upgrades. With years of industry experience, we specialise in crafting bespoke solutions for businesses across various sectors. Our team of dedicated professionals is committed to delivering cutting-edge, eco-friendly, and cost-effective systems that ensure seamless operation. From concept to completion, we pride ourselves on exceeding expectations, complying with industry standards, and providing sustainable solutions. Join us in creating a greener, more efficient future for your facility.


Regarding resolving boiler breakdowns, we are your reliable and rapid-response experts. With a proven track record in the industry, our skilled technicians are dedicated to getting your heating system back up and running efficiently. We understand the inconvenience and discomfort caused by unexpected breakdowns and pride ourselves on our swift and practical solutions. Whether a minor glitch or a significant issue, we can diagnose, repair, and restore your boiler to optimal performance. Your comfort and peace of mind are our top priorities, 24/7.

Planned Preventative Maintenance

PPM is imperative in the smooth operation of a commercial plant room,  Regular maintenance can identify and address minor issues before they escalate into major and costly problems. Fixing inexpensive problems is far more economical than dealing with significant, expensive repairs or replacements. Proper maintenance can significantly extend the lifespan of equipment and assets. Regularly servicing and caring for plant room equipment can prevent premature wear and tear, ensuring your investments last longer. Preventative maintenance is essential for cost savings, asset longevity, safety, compliance, and operational efficiency. It’s a proactive approach that can lead to significant benefits for both businesses and individuals.

Gas and Water Pipelines

Our specialist contractors provide a complete gas pipework service for Facilities Managers, industrial and commercial gas customers and M&E contractors throughout the UK.

We carry out excavations for new installation, repair and maintenance requirements and reinstate afterwards.

We install PE for low- and medium-pressure installations and steel welded and screwed above ground.

We manufacture, install and maintain medium-pressure governor rigs and offer maintenance contracts to ensure 24/7 peace of mind.

We carry out under-pressure work to maintain the gas supply to other parts of your system.

We carry out surveys, prepare drawings and line diagrams and provide compliance reports to ensure that your gas pipework system is kept up to date with Gas Safety Regulations and Statutory Compliance requirements. Contact us today for a complete survey.

Ovehead Heaters

We can service, maintain and install warm air units and overhead heaters. We can organise the hiring and off-hiring of scissor lifts for access if needed. Our prices are highly competitive; we will issue certification upon completing satisfactory work.

Mechanical Services in Portsmouth