EDSL were the first company to be accredited for Level 5 energy assessments, having
both the experience and software necessary to efficiently complete EPCs at a highly
Tas was the first software to be accredited for level 5 EPCs, and our Consultancy
department has been providing consultancy for EPCs ever since. Our consultants have
carried out EPCs on a wide range of buildings, both large and small, including office
blocks, hospitals and retirement homes. Tas is accredited for EPC work in Scotland as
well as England and Wales.
Tas can model a wide range of ventilation methods including CAV, displacement
ventilation and FATVAV, as well as more typical methods such as mixed mode and
fancoils. Tas can also model ground source heat pumps, wind turbines, solar hot
water panels and photovoltaic panels.
Tas is a dynamic model which can fully take into account beneficial features of a
building’s design and services. This leads to more accurate results which give a
better account of a building’s performance regarding CO2 emissions.
After completion of the EPC the TAS model can be used as a design/management tool to
help reduce the building energy consumption and hopefully improve the energy rating,
looking at factors such as building materials used or systems incorporated into the
If iterations are required these can be carried out by EDSL or the Tas files can be
handed to the client at project completion to enable them to carry out changes.
For further information on EPCs please see the case study below or email the
consultancy department using the online email form.
Example of CO2 emissions calculated using Tas. Results in this format make it easy to see
where changes need to be made to improve an EPC rating.
Example EPC certificate generated using Tas.