energy assessment - passivehouseplus.co.uk

The Keystone Group is the first lintel manufacturer to offer an online Psi-value calculator designed for energy assessors and architects. 

There has been a significant and sustained increase in the number of Building Energy Rating (BER) assessments being completed and published since January 1,  when it became mandatory by law for all dwellings offered for sale or lease, both new and existing, to have a BER certificate.