LowE FAQ

SARIERA Accredited Manufacturer of Energy Efficient Windows I am going to cover two important questions that have arisen lately. 1. The frame+glass U values KPJ has complied with SANS 613 achieving an A3 status for KPJ side, top hung and fixed range of windows. This means every product has passed independent laboratory testing for air tightness, water resistance and structural strength (minimum deflection). According to published data no other joinery in South Africa has achieved a rating of A3 for single glazed windows. Tests results are rated according to the European (EU) Code A-G. A Rating is the most energy efficient. A1 is the rating required for residential buildings in Gauteng. Heat Transmission (HotBox) testing is needed to establish U values for frame+glass. Numerous studies in the northern hemisphere have shown that all types of wood are used for windows because it is an excellent insulator. Wooden frames in Europe have been given U values that can match the U values of LowE glass available on the South African market. 2. Pricing To get the best price of single or double glazed LowE windows and doors you will need to choose sizes of windows that can be optimized within the size of sheets of glass (3210x2250mm) as supplied by the manufacturer, so it is advisable to get a quote on a full schedule to see the effect of costs.