Passive House Software Is Leaping Forward
With each iteration of the PHPP (Passive House Planning Package), Passive House practitioners get more powerful tools to reduce building energy by design. Of particular importance to the US audience, the version of PHPP 9 in Imperial Units (PHPP 9 IP) has been released, which is the first energy modeling software for the non-metric world to combine low-energy design with renewable energy supply to create cost effective solutions.
From The Back Of A Napkin, To A Premier Planning Tool
If you’re the type that enjoys numbers, you’ve done this: started a major project by opening up a blank Excel sheet and playing with some numbers to get a sense for your limits. Then you go from there, adding complexity and detail until you get the refinement you need and feel comfortable with and answer that reflects reality.
We say “software” when referring to PHPP, but as you may know, it’s an Excel spreadsheet. Since its development in 1998, it has been continuously tested and re-created to account for conditions around the globe, in every climate. The first editions looked primarily at space heating balances and for heat distribution and supply, as well as for the electricity and primary energy demand. As versions advanced we saw the addition and deepening integration of windows, shading, heating load and summer behavior, cooling and dehumidification demand, ventilation for large objects and non-residential buildings, taking into account of renewable energy sources, and retrofitting of existing buildings. The PHPP is continually being validated and extended on the basis of measured values and new research findings.
Ongoing PHI scientific research measures results and compares them with the calculated results. The result is a high correlation demonstrated between the PHPP demand calculations and the scientific monitoring of projects. With careful planning of building efficiency, there will be no performance gaps.
Tools For a Post-Carbon World
In the building world, transitioning to a post-carbon world means optimally integrating renewable energy supply with building construction, retrofitting existing building stock, and smartly dealing with demands of cooling and dehumidification in all climates. It is an ambitious comprehensive vision of how buildings should be made, and PHPP 9 was developed to deliver on it.
What makes it revolutionary? Three primary things:
- Variants: Variants provide greater cost and optimization control for new and retrofit construction. PHPP 9 enables input of efficiency parameters for different variants for easy comparison. Different steps of a renovation can also be entered, making it possible to depict the improvement in efficiency resulting from each individual refurbishment step and to conveniently assess projects with a long-term strategy.
- Positioning for Post-Carbon Primary Energy: Buildings planned today will be supplied with renewable energy to an increasing extent throughout their service life. This fact has been accounted for in the PHPP 9 through a new building assessment based on a new system for renewable primary energy (PER / Primary Energy Renewable) and allows for buildings executed today to be optimized to the power supply of tomorrow.
- Climate-Dependent Retrofits and Cooling: The international EnerPHit criteria embedded in PHPP 9 make it possible to specify minimum quality standards for the relevant building components in a renovation project depending on the location. In addition, the cooling and dehumidification demand requirements can be determined depending on the use-related internal loads and the local climate conditions.
Also Coming soon:
Connection to designPH: The PHPP IP 9-patch is complete and being tested for release. The patch will allow IP users to export from designPH 1.1.50 to PHPP 9.6 IP, a vital connection for those using the Sketch Up-based design tools. If you purchase designPH metric now, you will be able to receive an update to allow for this IP connection.