50746219 overview on passive house for phai
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Introduction to the Passive House Standard
Newgrange, a 5,000 year old monument celebrating
the importance of passive solar gain
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Advantages of Passive Houses:
Very low heating costs Reduced carbon emissions
High comfort Healthy indoor living environment
Bright airy buildings
Prolonged building life
Excellent sound proofing
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To put it simply, Passive Houses
Use 60% less heating energy than dwellings
built to Part L
Provide very high levels of Comfort and
health
Are affordable to build
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how does a passive house work?
If you minimise heat losses and maximise solar gains, you can reduceheating demand very significantly
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Passive House Design Principles
- Optimize solarorientation
- Build a compact form
- High insulated and airtight fabric
- Avoid thermal bridging
- Use efficient heating/ventilation system
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filter
thermal
insulation
passive
solar gain
throughwindows
ventilation
with heat
recovery
fresh air exhaust air
supply air
extract
air
Passive House Schematic Composition
air tightconstruction
Avoid thermal
bridges at all
junctions
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Highly insulated fabric
conventional passive houses
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Triple glazed with overall U-value
< 0.8W/m2
K Typically double low-E coating,
argon filled
Special low conductivity spacers
Double-gasket for airtightness
Frames thermally broken
High Performance Windows
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Build it tight...
Blower Door Testto measure level of air tightness
Level required is 0.6 ACH @ 50
Pascal (n50, not q50)
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Thermal Bridge Free Detailing
- Reduces heat
loss
- Improves
surface
temperatures
- Enhanced
comfort
- Eliminates risk
of mould
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Passive house standard Some Specifics
Maximum Space Heating Demand of15 kWh/m2/yearOr
Maximum Heat Load of10 W/m2 (normally 100 W/m2)
Maximum Primary Energy Demand of120 kWh/m2/year(for all energy needs, including appliances!)
Minimum Airtightness of0.6ACH @ 50 Pascal (n50, not q50)
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Passive House
House
Passive House
Apartments
Passive HouseSchool
Passive House
Factory
Passive House
Church
Passive House
Offices
Passive House
IndustrialPassive House
Retrofit
Passive House is not just for Houses
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Tesco SupermarketTramore, Waterford
Joseph Doyle Architects
Worlds 1st PH Supermarket
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All projects have to be modelled with the
passive house planning package (PHPP)
PHPP the essential design tool
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Retrofitting to the Passive House Standard
Social Housing
Project, Newry
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How does Passive House
compare to other standards? Conventional energy standard (65kWh/m2/year for space
heating)
Low energy (40kWh/m2/year for space heating)
Passive House (15kWh/m2/year for space heating)
2013 Carbon Neutral (on-site production of sufficientrenewable electricity to cover all primary energy needs except white and
black goods)
Net Zero Carbon (enough renewable electricity to cover allprimary energy needs as well as all embodied energy )
Living Building International Living Building Institute, Oregon
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Policy Context:
Irish Department Of EnergyDraft National Renewable Energy Action Plan:
June 2010
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Carbon Neutral Likely to require two elements:
1. Passive House Building Envelope 2. Renewable Energy Supply
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