Using DesignPH and PHPP for Passive House Design

Achieving Passive House (Passivhaus) certification requires meticulous planning and precise energy modeling. Two essential tools for this process are DesignPH and PHPP (Passive House Planning Package). These software solutions help architects, designers, and engineers create highly energy-efficient buildings by simulating performance before construction even begins.

In this blog post, we'll explore how DesignPH and PHPP work together and how to use them effectively in Passive House design.

What is DesignPH?

DesignPH is a SketchUp plugin developed by the Passive House Institute (PHI) to provide an early-stage 3D modeling and energy analysis tool. It allows users to create a building model, assign relevant thermal properties, and get a quick energy balance estimation before moving to the more detailed calculations in PHPP.

Key Features of DesignPH:

1. 3D Modeling in SketchUp – Easily create or import building geometry.

2. Climate &Orientation Analysis – Understand how location and solar gains impact energy performance.

3. Automatic Component Assignment – Quickly assign insulation values, window properties, and thermal bridges.

4. Preliminary Energy Balance Calculation –Get an early estimate of space heating demand and cooling loads.

5. PHPP Integration– Export data to PHPP for detailed certification-level analysis.

What is PHPP?

PHPP is an Excel-based energy modeling tool used for the final calculation and verification of Passive House projects. It provides detailed insights into a building’s energy performance, including heating and cooling loads, airtightness, and renewable energy potential.

Key Features of PHPP:

1. Comprehensive Energy Balance Calculation –Covers heating, cooling, ventilation, and humidity control.

2. Airtightness & Thermal Bridge Assessment –Ensures minimal energy losses.

3. Comfort & Indoor Climate Analysis –Ensures consistent temperatures and high indoor air quality.

4. Integration with Real-World Data – Uses climate files and actual material properties for accuracy.

5. Certification Compliance – Required for official Passive House certification.

How to Use DesignPH and PHPP Together

Step 1: Create the Model in DesignPH

1. Start by building a3D model in SketchUp.

2. Define building elements (walls, roofs, windows, and shading objects).

3. Set climate zone and orientation to analyze solar gains.

4. Assign insulation values, glazing properties, and ventilation strategies.

Step 2: Run the Initial Energy Balance

1. Use DesignPH’s built-in energy assessment tool to estimate the building’s space heating demand.

2. Identify areas where heat loss is excessive and optimize design elements accordingly.

Step 3: Export to PHPP for Detailed Analysis

1. Once satisfied with the DesignPH model, export it to PHPP.

2. PHPP will refine the calculations using more detailed inputs such as airtightness values, ventilation efficiency, and occupant behavior.

Step 4: Optimize& Iterate

1. Use PHPP to fine-tune insulation, window specifications, and HVAC systems.

2. Adjust design choices based on PHPP feedback to ensure compliance with Passive House standards.

Step 5: Finalize for Certification

1. Once all calculations meet Passive House criteria, prepare documentation for submission.

2. Work with a Passive House certifier to validate the results and obtain certification.

Benefits of Using DesignPH and PHPP

·        Saves Time – Early-stage modeling in DesignPH prevents costly design changes later.

·        Enhances Accuracy – PHPP provides precise energy modeling to ensure compliance.

·        Improves Energy Performance – Helps optimize design for maximum efficiency.

·        Supports Certification – Essential tools for achieving Passive House certification. 

DesignPH and PHPP are powerful tools that streamline the Passive House design process. By integrating early-stage 3Dmodeling with detailed energy analysis, these tools help designers create buildings that meet the highest energy efficiency standards. Whether you're working on a new construction project or retrofitting an existing building, mastering DesignPH and PHPP is essential for achieving Passive House success.

Are you working on a Passive House project?

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