Constructionline

G4 Group is an Constructionline approved contractor. 

Constructionline is the UK's leading procurement and supply chain management service that collects, assesses and monitors standard company information through a question set that is aligned to PAS 91, the standardised pre-qualification questionnaire developed by BSI to reduce duplication within the construction industry.

Grid connections

Grid connections

Connections are not simply a box-ticking exercise.  Each and every one has a considerable element...

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Fuel emulsion systems

Fuel emulsion systems

Fuel emulsion systems and multi-fuel processing may have been around for a long time, but very...

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Multi-fuel CHP packages

Multi-fuel CHP packages

For customers aiming to increase the margin on fuel costs and income from sales and subsidies...

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Process control

Process control

Our fuel emulsion and CHP systems are all controlled by in-house designed and built process...

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  • NICEIC
  • Constructionline
  • SAFEcontractor
  • CHAS
  • City & Guilds
  • Ofgem
  • DECC
  • CHPQA
  • Environment Agency