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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

Air Testing
As part of thermographic surveys we can also use an air Pressure testing kit to depressurise the building and help detect any air leakage within the property..more
Hertfordshire - Display Energy Certificates - 020 3390 0301
The office that covers this area is: London
The towns & cities that are covered within this county are:
Abbots Langley, Baldock, Barnet, Berkhamsted, Bishop's Stortford, Borehamwood, Broxbourne, Buntingford, Bushey, Cheshunt, Chorleywood, Harpenden, Hatfield, Hemel Hempstead, Hertford, Hitchin, Hoddesdon, King's Langley, Knebworth, Letchworth, Much Hadham, Potters Bar, Radlett, Redbourn, Rickmansworth, Royston, Sawbridgeworth, St. Albans, Stevenage, Tring, Waltham Cross, Ware, Watford, Welwyn Garden City, Welwyn,
Phone Number: 020 3390 0301 Email: hertfordshire@e2consultants.co.uk
Our other services include:
Display Energy Certificates can also be known as:
Display Energy Certificate, DEC,


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Company No. 06728970