A collection of useful and relevant external links:

NIBE UK – Official website of NIBE
http://www.nibe.co.uk

Uponor – Flexible Plumbing and Underfloor Heating
http://www.uponor.co.uk

Greenbook – Environmental Requirements
http://www.greenbooklive.com

The Microgeneration Certification Scheme
http://www.microgenerationcertification.org

Low Carbon Buildings Programme
http://www.lowcarbonbuildings.co.uk

Renewable Energy Assurance Listed Scheme
http://www.realassurance.org.uk