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Sound Insulation
Two parameters describe sound insulation; Dw and Rw. Dw is the insulation between rooms. Rw is the lab-tested insulation of a wall/floor...more

Good Hearing?
A typical person with good hearing can hear from about 20Hz to 20kHz (the audio bandwidth). A person's voice will usually range from 500Hz to 2kHz...more
Part L2B
Conservation of fuel and power

Birmingham - DEC - 0121 381 0129
The counties covered by this office are:
Shropshire, Leicestershire, Northamptonshire, West Midlands, Staffordshire, Warwickshire, Worcestershire, Herefordshire,
Phone Number: 0121 381 0129 Email: birmingham@e2consultants.co.uk
Our other services include:
DEC can also be known as:
Display Energy Certificate,


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Company No. 06728970