What R value is needed for passive house?
For Passive House, most buildings require envelope performance levels in the range of R-40 to R-60 for walls, R-50 to R-90 for roof systems, and typically about R-30 to R-50 for sub-slab assemblies.
What does passive house standards mean?
Passive house (German: Passivhaus) is a voluntary standard for energy efficiency in a building, which reduces the building’s ecological footprint. It results in ultra-low energy buildings that require little energy for space heating or cooling. A similar standard, MINERGIE-P, is used in Switzerland.
How do you meet Passive House standards?
To achieve the Passive House standard, you need to meet 5 main principles.
- 1 – High quality insulation. Rule number one when it comes to Passive House is to get your building envelope in check.
- 2 – Heat control and robust windows.
- 3 – Airtight construction.
- 4 – Heat recovery ventilation.
- 5 – Thermal bridge free design.
What is the thickness of insulation for a passive house?
Using typical conventional insulating materials (mineral wool, polystyrene, cellulose) the thickness needed is some 300 mm. This can be reduced to 200 mm by using polyurethane foam, which is more expensive, however.
How thick are walls in passive house?
The walls of a passive home are at a minimum of 6-inches thick, and in some places, may go to as much as 12-inches thick to accommodate additional insulation.
How do you meet passive house standards?
What type of insulation is used in a passive house?
1. Thermal insulation. Thermal insulation for Passive Houses must be extremely effective and so thick walls are built up using ‘super insulation’ to achieve high R-values. High-grade insulation ensures that the home is well insulated all year round which stops heat gained from the sun from leaking out.