Elmhurst Energy is the UK's largest independent provider of energy assessment training, software and accreditation. Since becoming established in 1993, we have trained and qualified over 7,500 Energy Assessors in the UK, and have built a reputation as the authoritative voice in the energy efficiency industry. With the help of Elmhurst's expert technical support team, accredited Energy Assessors can rest assured that their queries will be resolved quickly and professionally.

Energy One provides energy trading software products and services to UK and European energy market participants.

Welcome to the RUMM website where we help businesses reduce energy costs and increase profitability.