Energy Efficiency in Buildings

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1 Energy Efficiency in Buildings Supplemental Guide to SANS XA & SANS 204 V. 3.0 Registered to: The Drawing Studio Image: digitalart / FreeDigitalPhotos.net Report Date: 26 August 2014 Practice Name: Client's Name: Project Description: Site Address: Cadastral Description: This report is to be read in conjunction with the applicable drawings, specifications and other relevant documentation.

2 Climatic Zone & Data Site Location : Latitude: South Longitude: East Climatic zone : Average Conditions: Summer : Dec Feb Autumn : Mar May Winter : Jun Aug Spring : Sep Nov Wind Speed Temperature m/s C m/s C m/s C m/s C Average Solar Irradiance: Winter Solar Irradiance: kj/m²/d kj/m²/d kwh/m²/d kwh/m²/d Building Design - Occupancy Classification Occupancy Classification: Building Design Occupancy Times Design occupancy times: Hrs / Day Hrs / Week Days / Week Hrs / Year Building Design Population Design Population Reg. A20: Design Population:

3 Building Design Floor Area Proposal Total Floor Area: m 2 Proposal Nett Floor Area: Total Nett Floor Area: m 2 Building Design Maximum Energy Demand & Consumption Max. Energy Demand: VA/m 2 Permissible Demand: kwh Max. Energy Consumption: Permissible Consumption: kwh/(m 2 ) kwh

4 Building Envelope Primary Facade Orientation Building Orientation: Building Envelope Floors SANS XA Compliance: Underfloor Heating Installed: SANS 204 Compliance: Slab-on-Ground: Concrete Slab-on-Ground: Floor Heating System: Suspended Slab: Suspended Floor: Floor Heating System:

5 Building Envelope Walls SANS XA Compliance: External Wall Construction Wall Type 1 Wall construction: External Wall Construction Wall Type 2 Wall construction: SANS 204 Compliance: External Wall Construction Wall Type 1 Required - Min. R -value: CR-value (Hrs): Exterior Component Thickness (mm) Density (kg/m 3 ) Conductivity K-value (W/mK ) Interior Total Thickness: R -value Achieved: Summer : Dec Feb Autumn : Mar May Winter : Jun Aug Spring : Sep Nov m 2 K/W m 2 K/W m 2 K/W m 2 K/W CR -value Achieved : Summer : Dec Feb Autumn : Mar May Winter : Jun Aug Spring : Sep Nov hours hours hours hours

6 External Wall Construction Wall Type 2 Required - Min. R -value: CR-value (Hrs): Exterior Component Thickness (mm) Density (kg/m 3 ) Conductivity K-value (W/mK ) Interior Total Thickness: R -value Achieved: Summer : Dec Feb Autumn : Mar May Winter : Jun Aug Spring : Sep Nov m 2 K/W m 2 K/W m 2 K/W m 2 K/W CR -value Achieved : Summer : Dec Feb Autumn : Mar May Winter : Jun Aug Spring : Sep Nov hours hours hours hours

7 Building Envelope Fenestration SANS XA Compliance: Storey Level Nett area (m²) Fenestration area (m²) Percentage (%) fenestration Compliance Achieved: Shading Midday Summer Sunshine North facing windows shaded: Permissible air leakage Glazing Maximum permissible air leakage for glazing elements: Openable glazing: Non-openable glazing: Glazed double action swing and revolving doors: L/sm 2 L/sm 2 L/sm 2

8 SANS 204 Compliance: Fenestration Compliance Natural Environmental Control Conductance ( C U ) constant: Solar Heat Gain ( C SHGC ) constant: Storey Level Permissable Max. - Calculated Conductance SHGC Conductance SHGC Compliance Achieved: Storey Level Conductance SANS 204 Compliance? SHGC Fenestration Summary Refer to Detail Fenestration Report for individual fenestration element summary.

9 Fenestration Compliance Centrally Controlled Artificial Ventilation or Air-Conditioning Air-Conditioning Energy index: Storey Level Centrally Controlled Artificial Ventilation or Air-Conditioning Compliance Achieved: Basement Storey Orientation North North East East South East South South West West North West Facade Area (m²) Allowable A/C Achieved A/C SANS 204 Compliance? Ground Storey Orientation North North East East South East South South West West North West Facade Area (m²) Allowable A/C Achieved A/C SANS 204 Compliance? First Storey Orientation North North East East South East South South West West North West Facade Area (m²) Allowable A/C Achieved A/C SANS 204 Compliance?

10 Second Storey Orientation North North East East South East South South West West North West Facade Area (m²) Allowable A/C Achieved A/C SANS 204 Compliance? Third Storey Orientation North North East East South East South South West West North West Facade Area (m²) Allowable A/C Achieved A/C SANS 204 Compliance? Fourth Storey Orientation North North East East South East South South West West North West Facade Area (m²) Allowable A/C Achieved A/C SANS 204 Compliance? Fifth Storey Orientation North North East East South East South South West West North West Facade Area (m²) Allowable A/C Achieved A/C SANS 204 Compliance?

11 Sixth Storey Orientation North North East East South East South South West West North West Facade Area (m²) Allowable A/C Achieved A/C SANS 204 Compliance? Seventh Storey Orientation North North East East South East South South West West North West Facade Area (m²) Allowable A/C Achieved A/C SANS 204 Compliance? Eighth Storey Orientation North North East East South East South South West West North West Facade Area (m²) Allowable A/C Achieved A/C SANS 204 Compliance? Ninth Storey Orientation North North East East South East South South West West North West Facade Area (m²) Allowable A/C Achieved A/C SANS 204 Compliance?

12 Tenth Storey Orientation North North East East South East South South West West North West Facade Area (m²) Allowable A/C Achieved A/C SANS 204 Compliance? Fenestration Summary Refer to Detail Fenestration Report for individual fenestration element summary.

13 Building Envelope Roofs SANS XA Compliance: Roof Assembly Requiement Required - Min. R -value: m² K/W Direction of heat flow: Thermal Break Material Requirement Metal sheet roofing fixed to metal purlins / rafters / battens? Min. R -value Requirement Metal Roof Construction Metal sheeting type roofing material: R -value for roof covering material: R -value for ceiling: Required added R -value for insulation: m² K/W m² K/W m² K/W Min. R -value Requirement Tile Roof Construction Clay / concrete tile type roofing material: R -value for roof covering material: R -value for ceiling: Required added R -value for insulation: m² K/W m² K/W m² K/W

14 SANS 204 Compliance: STRICT Roof Construction Roof Type 1 Roof assembly ventilated? Roof construction: Roof Pitch: Roof construction: Component R-value (m 2 K/W) Reflective foil / radiant barrier: Emissivity : Insulation: Thickness : Density : R -value of Typical Roof Construction mm kg/m³ Roof Construction Roof Type 2 Roof assembly ventilated? Roof construction: Roof Pitch: Roof construction: Component R-value (m 2 K/W) Reflective foil / radiant barrier: Emissivity : Insulation: Thickness : Density : R -value of Typical Roof Construction mm kg/m³

15 SANS 204 Compliance: Rational Solution Roof Construction Roof Type 1 Skillion / Lean-to / Cathedral Exterior Component Thickness (mm) Density (kg/m 3 ) Conductivity K-value (W/mK ) Interior Achieved R -value Roof Assembly Roof Type 1 Skillion / Lean-to / Cathedral Direction of Heat Flow : Summer : Dec Feb Autumn : Mar May Winter : Jun Aug Spring : Sep Nov Up Down Up Down m 2 K/W m 2 K/W

16 SANS 204 Compliance: Rational Solution Roof Construction Roof Type 2 Pitch roof with horizontal ceiling Exterior Component Thickness (mm) Density (kg/m 3 ) Conductivity K-value (W/mK ) Interior Achieved R -value Roof Assembly Roof Type 2 Pitch roof with horizontal ceiling Direction of Heat Flow : Summer : Dec Feb Autumn : Mar May Winter : Jun Aug Spring : Sep Nov Up Down Up Down m 2 K/W m 2 K/W

17 SANS 204 Compliance: Rational Solution Roof Construction Roof Type 3 Flat roof Exterior Component Thickness (mm) Density (kg/m 3 ) Conductivity K-value (W/mK ) Interior Achieved R -value Roof Assembly Roof Type 3 Flat roof Direction of Heat Flow : Summer : Dec Feb Autumn : Mar May Winter : Jun Aug Spring : Sep Nov Up Down Up Down m 2 K/W m 2 K/W

18 Building Envelope Roof Lights SANS 204 Compliance Permissible air leakage Roof Lights Maximum permissible air leakage for roof lights: Openable glazing: Non-openable glazing: L/sm 2 L/sm 2 Roof Light/s Room / Space 1 Roof light/s serve: Room / Space designation: Room area: Total area of roof light/s: Roof light shaft length: Roof light as % of floor area: SHGC not to exceed : Total U -value not to exceed: m 2 m 2 Type: No. Off: m % Shaft index: W/m 2 K Roof Light/s Room / Space 2 Roof light/s serve: Room / Space designation: Room area: Total area of roof light/s: Roof light shaft length: Roof light as % of floor area: SHGC not to exceed : Total U -value not to exceed: m 2 m 2 Type: No. Off: m % Shaft index: W/m 2 K

19 Building Envelope Roof Lights Roof Light/s Room / Space 3 Roof light/s serve: Room / Space designation: Room area: Total area of roof light/s: Roof light shaft length: Roof light as % of floor area: SHGC not to exceed : Total U -value not to exceed: m 2 m 2 Type: No. Off: m % Shaft index: W/m 2 K

20 Building Envelope Building Sealing SANS 204 Compliance Permissible air leakage Chimneys and Flues Burning device type: Permissible air leakage External Doors External door serves a conditioned space? External door serves a habitable room in climatic zone: External door/s of swing type: Permissible air leakage Exhaust fans Exhaust fan/s serve a conditioned space? Exhaust fan/s serve a habitable room in climatic zone: Permissible air leakage Roofs, walls, floors and any openings Roofs, external wall/s, external floors, or any opening/s (glazing or door/s) serve a conditioned space? Roofs, external wall/s, external floors, or any opening/s (glazing or door/s) serve a habitable room in climatic zone :

21 Building Design Services SANS 204 Compliance Lighting and power Artificial lighting: Natural lighting: Energy demand and consumption Lighting and power Maximum permissible - Energy Demand (Power) Lighting: Annual Energy Consumption Lighting: Basement Storey Lamp Power (W) No. of Lamps Hours in use / day Energy Demand (W) W kwh Energy Consumption (kwh) Ground Storey Lamp Power (W) No. of Lamps Hours in use / day Energy Demand (W) Energy Consumption (kwh) First Storey Lamp Power (W) No. of Lamps Hours in use / day Energy Demand (W) Energy Consumption (kwh)

22 Second Storey Lamp Power (W) No. of Lamps Hours in use / day Energy Demand (W) Energy Consumption (kwh) Third Storey Lamp Power (W) No. of Lamps Hours in use / day Energy Demand (W) Energy Consumption (kwh) Fourth Storey Lamp Power (W) No. of Lamps Hours in use / day Energy Demand (W) Energy Consumption (kwh) Fifth Storey Lamp Power (W) No. of Lamps Hours in use / day Energy Demand (W) Energy Consumption (kwh) Sixth Storey Lamp Power (W) No. of Lamps Hours in use / day Energy Demand (W) Energy Consumption (kwh)

23 Seventh Storey Lamp Power (W) No. of Lamps Hours in use / day Energy Demand (W) Energy Consumption (kwh) Eighth Storey Lamp Power (W) No. of Lamps Hours in use / day Energy Demand (W) Energy Consumption (kwh) Nineth Storey Lamp Power (W) No. of Lamps Hours in use / day Energy Demand (W) Energy Consumption (kwh) Tenth Storey Lamp Power (W) No. of Lamps Hours in use / day Energy Demand (W) Energy Consumption (kwh) External & Security Lighting Lamp Power (W) No. of Lamps Hours in use / day Energy Demand (W) Energy Consumption (kwh)

24 Energy Demand (Power) Lighting Total lamp energy demand (W) : Available energy demand (W) : or Total lamp energy demand (W/m²) : Energy Consumption Lighting (per annum ) Total energy consumption (kwh) : Available energy consumption (kwh) : or Total energy consumption (kwh/m²) : Total Energy Demand / Consumption Whole Building Summary Energy Demand Max. Permissible - Energy Demand Building (kw): Energy Demand Lighting (kw): Utilised - Energy Demand Lighting (kw): Energy Demand Hot Water (kw): Available - Energy Demand Building (kw): Energy Demand Lighting (kw): Energy Consumption (annum) Max. Permissible - Energy Consumption Building (kwh): Energy Consumption Lighting (kwh): Utilised - Energy Consumption Lighting (kwh): Energy Consumption Hot Water (kwh): Available - Energy Consumption Building (kwh): Energy Consumption Lighting (kwh):

25 Hot Water Services Hot water design requirement Energy and storage capacity Building Occupancy: Type of Accommodation? Hot water demand Assumed: Select the Type of Accommodation. Daily Hot Water Demand: L Incl. 20% allowance for heat loss Annual Hot Water Demand: kl Based on design occupancy 50 % of Annual Hot Water Demand: kl Incl. 20% allowance for heat loss Energy design consumption Electrical resistance heating Energy consumption 60 C : Summer Autumn Winter Spring kwh Energy Consumption Daily: kwh 60 C Energy Consumption Annual: kwh 60 C 50 % of Annual Energy Consumption: kwh 60 C Hot water storage requirement Minimum Hot Water Storage Volume: L Hot water storage tank system Adopted Tank Storage Volume: Rated Power Input: Reheat Time: L kw h

26 Energy consumption Supplemental heating system Heat Pump System Total HW demand Design Requirement Reheat Time : Heat Pump Capacity: kw Calculated Circulation Pump Size : L/h Calculated Heat pump system Total HW demand Solution Adopted Heat Pump Capacity : Rated Power Input: Hot Water Yield: COP: h kw kw L/h Energy Consumption Heat Pump Total HW demand Solution Adopted Energy consumption Assumed: Summer Autumn Winter Spring Energy Consumption Daily: kwh Energy Consumption Annual: kwh kwh Heat Pump System 50% Annual Energy demand Design Requirement Min. Heat Pump Capacity: kwh Calculated Recovery Rate: L/h Calculated Heat pump system 50% Annual Energy demand Solution Adopted Heat Pump Capacity: kw Rated Power Input: kw Hot Water Yield: L/h COP: Energy Consumption Heat Pump 50% Annual Energy demand Solution Adopted Energy consumption Assumed: Summer Autumn Winter Spring kwh Energy Consumption Daily: kwh Energy Consumption Annual: kwh

27 Solar Hot Water (SHW) Heating System Design Requirement Energy Required - Total HW demand Solar Energy Required : kj/day Energy Required 50% of Annual Energy demand Winter Solar Energy Required : Available Solar Irradiance Average Solar Irradiance: Winter Solar Irradiance: kj/day kj/m²/d kj/m²/d kwh/day kwh/day kwh/m²/d kwh/m²/d SHW system Solution Adopted Absorber Type: Storage Tank Type: Supplementary Energy Source: SHW System Total HW demand Min. Absorber Area: m² Storage Tank Capacity Total HW demand Min. Primary Storage Tank Capacity: L Incl. 20% allowance for heat loss SHW Absorber 50% Annual Energy demand Winter Irradiance Min. Absorber Area: m² Storage Tank Capacity 50% Annual Energy demand Min. Primary Storage Tank Capacity: L Incl. 20% allowance for heat loss SHW Collector Installation Absorber Orientation: Absorber Tilt Angle: Degrees from horizontal

28 Insulation Requirements Hot Water Services Internal diameter of Hot Water Service Pipe: Min. Required R -value for Pipe Insulation: Min. Required R -value for HW Vessel / Tank: mm Note: Typical thermal properties of common building and insulating materials (design values) sourced from ASHRAE 2009 Fundamentals, CIBSE Guide A, Environmental Design & BRE Publication, BEPAC Research Report, BRE/169/12/1, The Harmonisation of Thermal Properties of Building Materials, 1990 Thermal resistance of building elements is calculated in accordance with SANS Interpolation of solar exposure factors, energy constants and heating / cooling shading multipliers is utilised in fenestration element calculations. Hot water system calculations and volume data is sourced from SANS and various on-line resources. Hot water energy consumption is calculated for a hot water requirement of 60 C with cold water temperature based on the average ambient air temperature for the climatic zone. Hot water demand calculations include a 20% allowance for heat loss within the water reticulation system. Mean available solar irradiance values is based on satellite-derived meteorology and solar energy parameters sourced from NASA Atmospheric Science Data Centre (http://eosweb.larc.nasa.gov/). Source values (kwh/m²/day) converted to kj/m²/day. Declaration: I, the undersigned, hereby certify that all the information contained in this report is to the best of my knowledge and belief, true and correct. Signature: Professional Registration No:

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