Sir, Domestic and non-domestic buildings account for around 40 per cent of all the energy consumed in the European Community. Fans consume around 18 per cent of the UK's non-domestic energy.
The significance of fan power is recognised in Part L2 of the building regulations, which was introduced in 2002 and specifies energy performance for air conditioning and mechanical ventilation systems.
As a specialist energy consultant I carry out energy audits on fan systems in air conditioning and mechanical ventilation plant.
Few of the systems installed in recent years meet Part L2, which specifies a specific fan power value of 2 W/l/sec.This is not being picked up.
While building services consultants can calculate these values following installation, will there be fully trained building control officers to inspect them?
The forthcoming European Union Directive on the Energy Performance of Buildings, which comes into force on January 4, 2006, allows an additional period of three years of compliance for systems that are regularly inspected for efficiency.
Will the UK have an army of skilled inspectors for measuring efficiency in buildings with a floor area greater than 1,000 sq m by January 2009? And if not, what is the solution?
Darren Bryant Efficient Air Limited Eastbourne East Sussex