<https://londonpropertycertificates.co.uk/tips-to-improve-epc-ratings-of-your-commercial-building/#webpage>
<http://schema.org/description>
"Commercial buildings in the UK are required to obtain Energy Performance Certificate (EPC) when it constructed, sold, or rented. The EPC rating displays the energy rating on a scale of A to G and is valid for 10 years."
<https://londonpropertycertificates.co.uk/tips-to-improve-epc-ratings-of-your-commercial-building/>