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Achieving EnerPHit: A Guide to Retrofitting Your Home to Passivhaus Standards

Updated: Dec 12, 2023

Creating an energy-efficient home is not just a personal triumph but a step towards a sustainable future. The EnerPHit standard, a rigorous benchmark for retrofitting existing buildings, offers a pathway to transform your living space into a model of sustainability. This  guide will help you navigate the process of retrofitting your home to meet this renowned standard.

Retrofitting: Your Pathway to a Sustainable Home

In the quest for sustainability, retrofitting our homes to be more energy-efficient is a crucial step. The EnerPHit standard provides a comprehensive framework for this transformation, promising significant reductions in energy consumption and carbon emissions. But what does it take to retrofit a home to meet this standard? Let’s explore the journey from assessment to certification.

Understanding EnerPHit

EnerPHit is the retrofit equivalent of the Passivhaus standard, which is the world’s leading standard for energy-efficient design. Homes that meet the EnerPHit standard can achieve up to 90% savings on heating bills and reduce carbon emissions by up to 95%. The result is not just a greener home but also a more comfortable living environment with consistent indoor temperatures and improved air quality.

The Retrofit Process

  1. Initial Assessment: The first step is to assess your home’s current energy performance. This involves evaluating insulation levels, airtightness, and identifying thermal bridges—areas where heat is lost more rapidly.

  2. Strategic Planning: With the help of the Passivhaus Planning Package (PHPP), a design tool specifically for Passive House projects, you can plan your retrofit measures. The PHPP will help you model your home’s potential performance and set realistic targets.

  3. Insulation Upgrades: Insulation is key to maintaining a warm home. Upgrading the insulation in your walls, roof, and floors will significantly reduce heat loss.

  4. Achieving Airtightness: Airtightness is crucial for preventing drafts and energy loss. This step may involve sealing gaps and cracks in the building fabric.

  5. Window Replacement: High-quality, triple-glazed windows are essential for thermal performance. They play a vital role in keeping your home warm in winter and cool in summer.

  6. Ventilation System Installation: A mechanical ventilation system with heat recovery (MVHR) ensures a constant supply of fresh air while retaining most of the heat from the exhaust air.

  7. Thermal Bridge Reduction: Addressing thermal bridges is necessary to prevent heat escape. This step is about fine-tuning the building’s thermal envelope for optimal performance.

  8. Heating System Overhaul: Consider installing efficient heating systems, such as heat pumps, and integrating renewable energy sources to further reduce your carbon footprint.

  9. Quality Assurance: Quality control is essential throughout the retrofitting process. Ensure that all measures are implemented correctly to achieve the desired energy performance.

  10. Certification Goal: The final goal is to achieve EnerPHit certification. This involves meeting specific criteria, such as a maximum space heating demand and airtightness level.

The Benefits of EnerPHit Retrofitting

Retrofitting to the EnerPHit standard offers numerous benefits. Firstly, the energy savings are substantial, leading to lower heating bills and a reduced carbon footprint. Secondly, the improved comfort levels make your home a more pleasant place to live. The consistent indoor temperatures and fresh air provided by the MVHR system contribute to a healthier living environment.

Challenges and Considerations

Retrofitting to the EnerPHit standard is not without its challenges. It requires a significant investment of time and resources. However, the long-term benefits outweigh the initial costs. It’s also important to work with professionals who have experience with the EnerPHit standard to ensure the best outcomes.


Embarking on an EnerPHit retrofit is a commitment to a more sustainable and comfortable home. It’s a journey that requires careful planning and execution, but the rewards are well worth the effort. By retrofitting your home to meet the EnerPHit standard, you’re not only reducing your energy bills and carbon emissions but also contributing to the global fight against climate change. So why wait? Take the first step towards a greener future today.


This guide provides a clear overview of the EnerPHit retrofitting process, highlighting the benefits and considerations involved. Whether you’re a homeowner looking to reduce your carbon footprint or simply seeking a more comfortable living space, EnerPHit offers a proven solution. With this knowledge, you’re well-equipped to begin your journey towards a sustainable, energy-efficient home.

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