U Values and SHGC for KPJ Products

U Values and SHGC of KPJ Products We have achieved great success with our standard single pane Premier range of Side, Top and Fixed windows achieving an A3 rating. The process is expensive with an outlay of R37000.00 to get the SANS 613 (Performance Test Certificate) and SANS 204 Rotatable Guarded Hot Box (RGHB) certification (Energy Rating Certificate) for a SINGLE product. The process of obtaining the U-factor (in W/m².K) is first to submit the product for RGHB test (which can only be done after obtaining SANS 613) then to have the results independently verified by simulation. Should the RGHB and simulation results be within 10% this is deemed acceptable and simulation of the ranges can be done. We are currently working closely with the simulators submitting samples of our seals, Meranti, types of treatment, and hardware so the simulation is as close as possible to the actual results. The simulation is also an expensive exercise and this depends on the complexity of the product. Costing ranges from R300.00 per item. Prices quoted for simulation of 200 windows is around R100 000.00. The SHGC is largely dependent on the GLASS, however Steel and Aluminium without a thermal break are generally a great Hi-Way for conductance increasing the overall SHGC. Thus Timber will give a better SHGC and the more timber there is the better the SHGC.