Energy efficient windows for sustainable development Copyright of Wispeco (Pty) Ltd

Wispeco’s Crealco Brand Innovative Modern Creative design Energy efficient Green Compliant © Copyright Wispeco Wispeco’s Crealco products are certifiable in terms of the NBR provided that GENUINE Wispeco material is used and if fabricated and installed according to Crealco product manuals.

Navigating Crealco Products MALL MANSION TOWER HOME © Copyright Wispeco

National Building Regulations Energy Efficiency of the Building Envelope © Copyright Wispeco

National Building Regulations ( Fenestration) SANS XA: Application of the National Building Regulations Energy Efficiency of Building Envelope – General Principles Deemed to Satisfy Rules: Orientation & shading External walls Fenestration Roof construction In-slab heating Hot water systems Certified by Competent Person: Does not exceed set limits Is ≤ than certified reference building Fenestration: SANS 613 & SANS 204 © Copyright Wispeco OccupancyBuilding description Max. energy consumption kWh/m 2 Climatic Zone A1 Entertainment and public assembly A2 Theatrical and indoor sport A3 Places of instruction A4 Worship F1 Large shop G1 Offices H1 Hotel

Deemed to Satisfy Requirements for Fenestration Deflection ≤ 1/175 th of length A1: 1000Pa (minimum) A2: 1500Pa A3: 2000Pa (etc.) Air leakage at 75Pa: Opening panes ≤ 2,0 l/s/m 2 Fixed panes ≤ 0,31 l/s/m 2 Swing & revolving doors ≤ 5,0 l/s/m 2 Mechanical Requirements (SANS 613) for structural integrity © Copyright Wispeco Zero water infiltration at 20% of tested wind load

Deemed to Satisfy Requirements for Fenestration Window area ≤ 15% of floor area: Conductance (per storey or floor): Total = (U 1 x A 1 ) + (U 2 x A 2 ) Total ≤ floor area x conductance constant Thermal Requirements (SANS 204) Automatically deemed to satisfy requirements of SANS 204 Window area > 15% of floor area: © Copyright Wispeco Solar Heat Gain (per storey or floor): Total = (S 1 x A 1 x E 1 ) + (S 2 + A 2 + E 2 ) + …. Total ≤ floor area x solar heat gain constant

Air Leakage Framing material (Typical window) Tested air leakage [max 2,0 ℓ/s.m 2 ] Aluminium PVC Wood Steel 0,376 2,544 3,466 More than 5,787 Based on independent tests conducted on “off-the-shelf” windows in different materials of identical configuration by the Thermal Test laboratory (TTL) a SANAS accredited test laboratory (2008) Aluminium offers a superior weather seal above typical windows of competing materials Prescribed limits for air leakage at 75 Pa: Opening panes ≤ 2,0 l/s·m 2 Non-opening panes ≤ 0,31 l/s·m 2 Glazed swing and revolving doors ≤ 5,0 l/s·m 2 Most underrated and overlooked element of heat losses or gains through windows. © Copyright Wispeco

Conductance (U-value) (Fenestration area > 15% of floor area) (U 1 x A 1 ) + (U 2 + A 2 ) + …. ≤ A F x C U Ui = U-Value of window 1Ai = Area of window 1 A F = Enclosed floor area (per storey)C U = Conductance constant Framing material (Typical window) Tested U-value (1) [W/m 2 K) Default U-value (2) [W/m 2 K] Aluminium PVC Wood Steel 5,22 4,36 3,92 5,32 7,9 5,6 7,9 1 Based on independent tests conducted on “off-the-shelf” windows in different materials of identical configuration by the Thermal Test laboratory (TTL) a SANAS accredited test laboratory (2008) 2 As per SANS 204 Don’t use default values!!! © Copyright Wispeco

Radiation (SHGC) (Fenestration area > 15% of floor area) © Copyright Wispeco (S 1 x A 1 x E 1 ) + (S 1 x A 1 x E 1 ) + … ≤ C SHGC x A F S 1 = Solar heat gain for window 1A 1 = Area of window 1 E 1 = Solar exposure factor window 1A F = Enclosed floor area C SHGC = SHGC constant Framing material (Typical window) SHGC (Single clear) Aluminium PVC Wood Steel 0,81 0,77 0,81 It’s all about the glass! Based on independent tests conducted on “off-the-shelf” windows in different materials of identical configuration by the Thermal Test laboratory (TTL) a SANAS accredited test laboratory (2008)

Comparative Energy Efficiency (Independent TTL tests on typical windows 2008) Acknowledgement to AAAMSA for use of the following information For a typical “run-of –the-mill” window, Aluminium offers the best thermal performance © Copyright Wispeco

What is a Window System? Crealco Serene Crealco Edge Crealco 36 Crealco 38 Crealco Serene Crealco Edge Wispeco 28 Wispeco 30.5 Wispeco 340 Crealco 36 Crealco 38 © Copyright Wispeco

Aluminium Framing Options (Casement windows) Crealco Serene Crealco Edge Crealco 36 Crealco 38 Crealco Serene Crealco Edge Wispeco 28 Wispeco 30.5 Wispeco 340 Crealco 36 Crealco 38 © Copyright Wispeco

U-Values for Glass (typical) 4mm Monolithic6.38mm Lam25mm IGU U-value 5.8U-value 2.7U-value 5.8 © Copyright Wispeco Cost implication! U-value mm Lam Low-E

U-Solve Demo © Copyright Wispeco For architects and can be downloaded free of charge at

© Copyright Wispeco

Typical U-Value Ranges Aggregate U-Values to Comply with SANS 204 Window / Net Floor Area Ratio (%) ZoneCu Cold Interior Pretoria etc page 13 / 15 The popular design range Architect can design from the Window to net Floor area ratio (%) or from a Cost point of view A specific house / floor lies in only one cell in the schedule next to this. From there follow the red ringed cells in the other schedules. (Can put more %'s in) The darker the green the lower the U-value and the more expensive the solution 100% 115%135% 167% 175%200%210% U Value AAAABBCCDEF 1 2 5

1 2 5

Fenestration Performance Declaration ( Aimed at providing the architect with a uniquely numbered, traceable, composite declaration document in respect of the design, fabrication and installation of the aluminium fenestration products in a completed building in order for the architect to issue a CoC with confidence © Copyright Wispeco

Fenestration Performance Declaration ( Composite declaration: Issued by Fabricator to Architect Confirming the use Wispeco’s Agrément certified and Safiera endorsed design software i.e. Starfront and U-Solve Confirming the use of only genuine Crealco / Wispeco material in the manufacturing of the windows and doors Confirming compliance to Wispeco’s manufacturing and installation guidelines Thereby confirming validity and applicability of Wispeco’s tested and certified product performance specifications (AAAMSA & SAFIERA) © Copyright Wispeco

Questions? © Copyright Wispeco