Con Kantis Architectural Segment Manager - VIC

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2 Con Kantis Architectural Segment Manager - VIC

3 How glass is made 41-51% Sand SiO² Silicon Dioxide 16% Soda Ash Na ² CO³ Sodium Carbonate 4% Limestone CaCO ³ Calcium Carbonate 13% DolomiteMgCa(CO ³) Magnesium Calcium Carbonate 15-25% Recycled Glass 1% Other Raw Materials (produces toned glasses) Cobalt Selenium Iron Titania Plus Salt Cake Na² SO4 Sodium Sulphate = Window Glass

4 Glass manufacture Quality Testing Lab Cold End Cutting & Processing Floatliner Vehicles Batch Plant Quality Inspection & Control Booth Lehr Float bath Furnace Simplified Diagram of Dandenong Floatline

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6 Glass Solutions Manufacturers of high performance engineered flat glass products in single or double glazed options. Australia s only glass producer with a comprehensive product range that deliver enhanced glass solutions in the following areas; Energy Efficiency Fire, Acoustics and Security Protection Structural Glazing Self Cleaning and Speciality Glasses

7 GLASS TYPES

8 GLASS TYPES Viridian VFloat - Float Glass Viridian VLam Laminated safety glass Viridian VTough Toughened safety glass Viridian VLam Tough Toughened laminated..safety glass

9 INSULATED GLASS UNITS

10 THE ROLE OF THE BCA The objective of Section J is to reduce Greenhouse emissions by increasing the energy efficiency of buildings. A building must have a level of thermal performance to facilitate the efficient use of energy for artificial heating and cooling appropriate to its function and use, geographic location and internal environment. To control the amount of energy entering or leaving the building through glazing

11 THE ROLE OF THE BCA State Zones 1,3 1,2,3,5 1,3,4,5,6 4,5,6 2,4,5,6,7,8 4,6,7,8 7,8

12 THE ROLE OF THE BCA. Section J 1-3 aimed at reducing heat gain 4 & 5 - aimed at balancing heat gains versus heat losses 6-8 aimed at reducing heat loss 100% North Facing, Clear Glazed 80% 60% 40% 20% COOL (MJ/m2.a) HEAT (MJ/m2.a) D AR BR I P AS AL B R PE D SY L AD E LB M E TH R ED BO H O BA R T C AN B ER R A 0%

13 What makes a comfortable building? What we find is that Temperature lies at the heart of physical comfort and therefore is central to designing a comfortable building.

14 ORIENTATION & EXPOSURE Measure exposure to summertime solar radiation, taking into account: Summer Orientation Shading provided Shading can be achieved by: Permanent features Shading Devices Winter

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16 Energy Efficiency Glass Fundamentals 60% loss in winter 91% gain in summer

17 Mechanisms of Heat Transfer Conduction and Radiation Conducted Heat controlled by thermal insulation Radiated Heat controlled by absorption, reflection & shading R3.5 Inside R2.0 R0.15 Outside

18 TERMINOLOGY & DEFINITIONS

19 HEAT GAIN In a predominately warm climate or during the summer months, we ideally need windows with a low Shading Co-Efficient/Solar Heat Gain Co-Efficient to Short Wave Radiation passes through glass Keep Heat Out!!

20 Heat gain. What does Solar heat gain coefficient (SHGC) mean? SHGC measures how well a product blocks heat caused by sunlight. It comprises the direct solar transmission and the part of the solar absorption dissipated inwards by radiation and convection. The lower a window s SHGC, the less heat it transmits.

21 SHGC - Solar Heat Gain Co-Efficient Control & Manage Solar Heat Gain egardless of outside temperature, heat can be gained through windows by direct or indirect solar radiation he ability to control this heat gain is measured in terms of the Solar Heat Gain Co-efficient (SHGC) olar heat gain can be beneficial in winter but undesirable in summer ractical SHGC range is ~ 070 to 0.20 ower the rating the greater solar control

22 Heat Gain - SHGC Performance Improvements for hot climates/solar exposure 1. Clear Glass Least resistance to heat gain. SHGC Tinted glass Moderate resistance to heat gain. SHGC Heavy tinted or Reflective glass High resistance to heat gain. SHGC Tinted Low E can boost performance on all the above Note: Use of shading devises can reduce heat gain

23 6m m Cl rf lo at G re 6m y T m on Gr ed ee n 6m To m ne Su d pe rg 6m re m en Su pe 6m rb lu m e Su 6m pe m rg Ev re 6m an y m ta Ev ge an G 6m re ta ge y m Ev Bl ue an /G ta ge rn Su pe rg 6/ 12 rn /6 Cl ru 6G nit re y/1 2/ 6G 6C re lr en /1 2/ 6C 6E lr gr n/ 6S 12 up /6 Cl er 6 r EV gr y/ an 12 6 ta / 6C E ge Va lr Gr nt y/1 ag e 2 6 /6 Bl Ev Cl ug an r r n/ ta 12 ge / 6C Sp lr rg rn /1 2/ 6C 6C lr l r/ 12 /6 6G lo re we y/1 2 /6 6G Lo re we en /1 6S 2/ 6L up ow rg rn E /1 6S 2/ up 6 6 Lo er EV gr we y/ an 12 ta 6 / 6L ge E Va ow Gr nt E y/1 ag e 2/ 6 6L Bl Ev ug ow an rn E ta /1 ge 2/ Sp 6L ow rg rn E /1 2/ 6L ow E 6m m SOLAR HEAT GAIN CO-EFFICIENT (SHGC) Clear single SuperGreen Single Clear IGU Clear IGU/Low E SuperGreen IGU SuperGreen IGU Low E

24 HEAT LOSS In a predominately cool climate or during the winter months, we ideally need windows with a low U-Value to Keep Heat In!! (i.e.. Reduce heat loss as warm air inside will be drawn towards the cold air outside)

25 Insulation What is a U Value? U Value measures how well a product prevents heat escaping. It is a measurement unit in watts per m² per degree celcius (W/m² C) and is a measure of the rate of heat gain or loss through glazing due to environmental differences between outdoor and indoor air. The lower the U Value, the greater the window s resistance to heat flow and the better its insulating value.

26 Insulation Improvement basics NatHERS Star Ratings by Climate Zone Darw in Bulk Insulation Improved Windows Canberra 800 Hobart 600 Tullamarine Adelaide 400 Sydney West & Southw est Perth Brisbane Building Energy Loss (MJ/m2.yr) 1000 Star Rating

27 U-Value Thermal conductivity is the flow of heat through the window glass & window frame Consider it as insulation the window provides The U value of a window is used to measure the level of insulation Practical Uw Range is ~ 6.2 to 1.8 Lower the figure the better insulation U-Value (Watts/m²) Reciprocal of R-Value (1/R) U-Value 5.9 = R-Value 0.17

28 Insulation U Value Performance improvements for cold climates 1. Float Glass Least resistance to heat loss. U Value Low E Glass Moderate resistance to heat loss. U Value Double glazed High resistance to heat loss. U Value Double glazed Argon High resistance to heat loss. U Value Double glazed Low E Very high resistance to heat loss. U Value Double Glazed Low E Argon Very high resistance to heat loss. U Value Double glazed Low E Triple Silver Argon Highest resistance to heat loss. U Value 1.3

29 THE ROLE OF THE BCA A glazing element is a whole window or panel, that is glass and frame together Figures supplied by Viridian are glass only, and go towards the glazing element assessment All Viridian glass has been assessed by NFRC calculations Depending on the frame type and material, this may impact of Section J assessments While glass will be responsible for the greater majority of the window performance, the type of frame will impact the final performance House energy rating tools require performance data for the total window, ie window and frame The performance will vary greatly depending on whether the frame is aluminium, aluminium improved, timber or Upvc It will also vary between frame manufactures

30 Insulation What is considered a standard aluminium frame? Assume that aluminium frames are standard unless the manufacturer provides a Window Energy Rating (WERS) which demonstrates that better performance will be achieved by using the particular frame.

31 Insulation What is considered a thermally broken aluminium frame? To be classified thermally broken a window must conform to the following U.S NFRC definition. Thermal break: A material of low thermal conductivity that is inserted between members of high conductivity in order to reduce heat transfer. Thermal barrier material conductivity shall be no more than 0.5 W/m.K. Thermally broken members: System members with a minimum of 5.30mm separation provided by a low-conductance material (where thermal conductivity is less than or equal to 0.5 W/m.K)

32 Insulation Glass & Frame Performance Product Centre/Glass U Val SHGC 150 Alum U Val SHGC 100 Alum U Val SHGC Thermally broken U Val SHGC Timber U Val Vinyl/PVC SHGC U Val SHGC 6 Clear CPlus Clr CPlus Ntr Clr Clr Low E

33 Insulation U Value & Glass Type Alum Frame

34 Low E Application Quality Testing Lab CVD Coater Floatliner Vehicles Cold End Cutting & Processing Batch Plant Quality Inspection & Control Booth Lehr Float bath Furnace Simplified Diagram of Dandenong Floatline showing CVD Coater position

35 CVD Online Coater durable hard coated surface In the electron microscope picture, the polycrystalline structure of the surface of the tin oxide top coat can be seen as a layer of closely packed grains. Excellent Daylight Transmission: Daylight can easily pass through the EnergyTech coating with less than 1% alteration, because each grain is actually smaller than the wavelength of visible light, which ensures excellent daylight transmission and clarity. Surface of EnergyTech glass x 20,000 times magnification Cross Section of Surface x 50,000 times

36 How does Low E glass Work? Ordinary glass is a very poor insulator and allows heat to radiate and flow through it very easily. Whereas Low E glass reduces this radiation, lowering the total heat flow through the glass.

37 How does Low E glass Work? What does Emissivity mean? Put simply - it describes the capacity of a surface to radiate heat. So lower the emissivity the less it radiates heat. This can be really useful for glass!

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