A company has invested in three eco-friendly portable buildings.

4M Portable Buildings, based in Prees Green, has added the towable Eco Welfare Units to its hire fleet and says it is already seeing the rewards from doing so.

The units, which are designed with renewable energy alternatives, are believed to be the 'world’s most sustainable cabins' and are currently being contracted out back-to-back to construction sites.

The units produce almost no carbon emissions, and include canteen facilities, dedicated office space and toilets.

Fitted with solar panels on the roof, the 12-person units are able to produce energy for all the building’s needs.

Backup energy is provided with HVO biofuel and efficient electrical systems.

The units remain high functioning, but with limited damage to the environment.

They are easier to manage and are self-sufficient.

Manufactured by Boss Cabins, the Eco Units minimise CO2 both internally and externally and are built with 100 per cent stainless steel to ensure longevity.

Each unit is 97.2 per cent recyclable and fitted with majority recycled materials.

Water usage has been reduced with the installation of water-free urinals and micro-flush toilets that use 90 per cent less water per flush compared to the average toilet.

Mark Jones, operations manager at 4M, said: "We added these revolutionary new units to our fleet about 18 months ago and the purchase of them has proved to be a very significant milestone for us.

"They provide a more efficient and greener choice for customers and make a significant contribution to corporate ESG and B Corp agendas.

"For us as a business, being able to offer the Eco Units to customers is a beneficial move from all angles.

"Most significantly, we want to ensure that we continuously adapt to the ever-evolving environmental agenda and customer needs.

"We are now planning to increase the number of Eco Units due to demand and, for us as a business, they ensure that more of our fleet can operate with zero carbon footprint."