In order to address the ‘Performance Gap’ between a designed building and the operational performance once in-use, we are skilled in designing and modelling Design for Performance standard buildings. The process ensures that energy demand is reduced as far as possible via a collaboration process between the Mechanical Engineer, Electrical Engineer, Architect and Thermal Modeller.
The Design for Performance process involves the use of software that is capable of detailed definition, configuration, control and modelling of HVAC systems. At KJ Tait we use the IES VE programme Apache HVAC to model all our buildings that go through the framework.
The resultant energy consumption from the modelling is translated into a NABERS Target Star Rating out of 6 stars and the report and design documents are sent to an Independent Design Reviewer to assess both the design and the thermal modelling. This ensures that the process is as robust as possible for determining what the NABERS Target Star Rating would be.
After one year of at least 75% occupancy, the NABERS UK In-Use assessment is carried out to ascertain the Actual Rating of the building using the actual billing and metering information. If there are any discrepancies between the Target Rating and the Actual Rating, the Assessor will provide operational recommendations to bridge the performance gap.
There are many advantages for office buildings to go through the Design for Performance framework including: