Passive construction presentation dc


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Passive construction presentation dc

  1. 1. Passive Construction<br />By Dwayne Cowzer<br />
  2. 2. Passive Construction: When a building is so well insulated and made air-tight that it reduces the need for a heating system to a minimum. <br />“Spend €1 on insulation to save a Kilowatt, or spend €10 on solar panels to gain a Kilowatt”. <br />Introduction<br />
  3. 3. Spending money during construction vs. Spending money to heat the building over time. <br />Also deals with natural lighting- ‘Passive Solar Design’. <br />Passive Construction<br />
  4. 4. Sunlight is environmentally friendly, as well as a lighting & heating source that is free of charge. <br />Techniques have been developed to use solar energy in buildings. <br />Window design can reduce heating demand by about 10% compared to an average house (Energy Efficiency Office, 2005). <br />Passive Solar Design<br />
  5. 5. Factors that are taken into account: <br />Positioning of the building<br />Smaller windows on the North side<br />Larger windows on the South side<br />Rooms that require better lighting & heat have south-facing windows (eg living-room, bedrooms etc)<br />Triple-glazing helps keep heat-loss through the windows at a minimum<br />Passive Solar Design<br />
  6. 6. ‘Super-insulated’, air-tight houses that require little or no heating systems. <br />Renewable technologies are not necessarily needed to heat the building. <br />Well-insulated air-tight envelope<br />Passive Housing<br />
  7. 7. Passive House Renovation in Foxrock (Construct Ireland Magazine, 2009). <br />Homeowner decides to renovate existing detached house<br />He had not intended initially on improving to a passive standard, but ended up with an almost passive house, with renewable technologies etc for water heating. <br />Passive House Project Example<br />
  8. 8. The changes and improvements to the house:<br />100mm cavity in the walls were pumped with ‘warmfill’, with polystyrene insulation. <br />Walls were dry-lined with 100mm of KingspanKooltherm insulation board. <br />200mm of KingspanKooltherm insulation in the ground floor. <br />275mm of KingspanKooltherm board in the roof. <br />Windows changed to triple-glazed, krypton filled from Austria. <br />Passive House Project Example<br />
  9. 9. Changes and improvements cont’d:<br />Air-tight membrane installed between the insulation and block-work. <br />Flat-plate solar panels on the roof to heat water. <br />Heat Recovery Ventilation (HRV) system to warm fresh air coming into the building etc. <br /> Roof lights installed for extra natural light (triple-glazed). <br />Passive House Project Example<br />
  10. 10. The important factors of a passive house are shown on the above diagram.<br />Passive House Diagram<br />
  11. 11. Designed using passive construction techniques. <br />Included the usual passive elements: <br />Good insulation<br />Air-tight<br />Triple-glazed roof-lights and windows for natural light. <br />An array of 40 photovoltaic panels on the roof to generate electricity onsite. <br />Timber-Frame: Environmentally friendly. <br />Tesco, Tramore<br />
  12. 12. The main problem to tackle was the fact that the doors would need to be opened frequently for customers. <br />This problem was solved by having a porch with external sliding doors, and an ‘warm air-curtain’ inside. <br />The air-curtain acts as a barrier to prevent heat-loss. <br />This case shows the ability to create passive commercial buildings as well as houses. <br />Tesco, Tramore<br />
  13. 13. An array of 40 photovoltaic panels located on the roof<br />Photovoltaic Array on Tesco in Tramore<br />
  14. 14. Passive Construction <br />Well-positioned building<br />Well-insulated, airtight, minimum need for heating systems. <br />Passive Solar Design<br />Glazing: Maximum use of natural light<br />Good window design and positioning for best results.<br />Heat Recovery Ventilation systems:<br />Important for heating air and keeping the building ventilated. <br />Important Points<br />
  15. 15. Thank You<br />Any Questions?<br />