Last year we began the process of working with Mike Barker (an independent consultant & ‘component person’) & BuildingPhysics (who offer building simulation services ranging from daylighting and thermal analysis to smoke and fire modelling) to undertake simulated energy performance tests on both our Winblok and Winslot windows systems to confirm compliance with and obtain the NFRC ratings and SANS 10400-XA certification.
The National Fenestration Rating Council (NFRC) has developed and operates a uniform international rating system for the energy performance of fenestration products, including windows, doors, skylights, and similar products. The key of the Rating System is a procedure for determining the thermal transmittance (“U-factor”) of a product. The U-factor rating procedure is supplemented by procedures for rating products for solar heat gain coefficient (“solar heat gain” or “SHGC”), visible transmittance (“VT”), air leakage (“AL”), and condensation resistance (“CR”). Together, these rating procedures, as set forth in documents published by NFRC, and are known as the NFRC Rating System.
SANS 10400-XA, published in August 2011, is a new part of the South African standard for environmental sustainability and energy usage in buildings, and forms part of the National Building Regulations. For now, its focus is purely on energy consumption and maximum energy demand.
As of 2014 we are now able to provide the Simulated Energy Performance Rating Certification for all design permutations for both the Winblok and Winslot systems on request – confirming compliance with SANS 10400-XA simulation and calculations according to NFRC and ISO standards.
Contact us if you require this information for your next project.