Offices Nationwide
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
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
Part L2B
Conservation of fuel and power

Predicted Energy Assessments Quote in Wrexham County
Warning: mysqli::__construct(): (HY000/1203): User elite_user already has more than 'max_user_connections' active connections in /data05/elite/public_html/page_top_test.php on line 162
Warning: mysqli::select_db(): Couldn't fetch mysqli in /data05/elite/public_html/page_top_test.php on line 163
Warning: count(): Parameter must be an array or an object that implements Countable in /data05/elite/public_html/includes/rightpanel.php on line 25
Copyright 2026 E2 Specialist Consultants Limited
Company No. 06728970
Warning: mysqli::__construct(): (HY000/1203): User elite_user already has more than 'max_user_connections' active connections in /data05/elite/public_html/page_top_test.php on line 162
Warning: mysqli::select_db(): Couldn't fetch mysqli in /data05/elite/public_html/page_top_test.php on line 163
Warning: count(): Parameter must be an array or an object that implements Countable in /data05/elite/public_html/includes/mobfooter.php on line 239
Warning: count(): Parameter must be an array or an object that implements Countable in /data05/elite/public_html/includes/mobfooter.php on line 244
