====== EnerPHit: The Passive House Standard for retrofits ======

{{ :picopen:enerphit_classic_new.png?200|}}

It is not always possible to achieve the fulll Passive House Standard for [[planning:refurbishment_with_passive_house_components|refurbishments of existing buildings (introductory article)]], even with adequate funds. For this reason, the PHI has developed the **EnerPHit Standard** – Quality-Approved Energy Retrofit with Passive House Components - as quality assured certification scheme for renovation of existing buildings. It can be applied on one go or as a phased approached using the EnerPHit retrofit plan. 

[[:certification:enerphit:EnerPHit building renovation]]

Significant heating/cooling energy savings of between 75 and 90 % can be achieved even in existing buildings, for which the following measures have proved to be particularly effective [Bastian 2022]. The general approach to prevent lock-in and achieve high quality cost-effective solutons is: **If you do it, do it right!**

  * Improved thermal, similar to Passive House newbuild levels
  * [[:planning:refurbishment_with_passive_house_components:thermal_envelope:minimising_thermal_bridges|Reduction of thermal bridges]]
  * Considerably [[planning:airtight_construction:airtightness_and_airtightness_measurement|improved airtightness]]
  * Use of high quality [[:planning:thermal_protection:windows|windows]]: Use of Passive-House-suitable windows whenever the opportunity arises.
  * [[:planning:building_services:ventilation:basics:types_of_ventilation#the_convenient_solutionsupply_and_exhaust_air_systems_with_heat_recovery|Ventilation with highly efficient heat recovery]]. Again, aligned with Passive House newbuild efficiency recommendations
  * Efficient heat generation
  * Use of renewable energy sources. Depening on use of renewable energy, EnerPHit is also availble as [[certification:passive_house_categories|certification classes Classic, Plus and Premium]]. 


These are exactly the same measures that have proven to be successful for new constructions. A number of examples demonstrating the application of high-efficiency technology in existing buildings are available, including monitoring data as proof of concept of the achieved energy savings. You can find examples of implemented EnerPHit buildings in the online [[http://www.passivhausprojekte.de/index.php?lang=en | Passive House Database]] (advanced search, filter by Energy Standard / building type for EnerPHit projects). 

To know more about the EnerPHit-Standard we recommend visiting the following section in the Passive House Institute's website and take a look at additional resources listed below.

  * **[[http://www.passiv.de/en/03_certification/02_certification_buildings/04_enerphit/04_enerphit.htm|EnerPHit: PHI-Certificate for Refurbishment of existing buildings]]**\\
  * **[[https://passivehouse.com/03_certification/02_certification_buildings/06_process/06_process.html|Staged retrofit with the EnerPHit Retrofit Plan (ERP)]]**\\
  * **[[http://www.passiv.de/downloads/03_building_criteria_en.pdf|Certification Criteria for the Passive House, EnerPHit and PHI Low Energy Building Standard]]**\\

|{{:picopen:enerphit_id5807.jpg?360|}}|{{:picopen:enerphit_id4200.jpg?400|}}|
|Example certified EnerPHit Plus project in Manchester, UK.\\ Find out more in the project database: [[https://passivehouse-database.org/index.php?lang=en#d_5807|ID: 5807]]|Examle certified EnerPHit universtity building in Innsbruck, Austria.\\ Find out more in the project database: [[https://passivehouse-database.org/index.php?lang=en#d_4200|ID: 4200]]|


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======Literature======

[Bastian 2022]: Bastian, Z., Schnieders, J., Conner, W., Kaufmann, B., Lepp, L., Norwood, Z., Simmonds, A., Theoboldt, I.: Retrofit with Passive House components. Energy Efficiency 15, 10 (2022). [[https://doi.org/10.1007/s12053-021-10008-7]]. The article can be [[https://rdcu.be/cFgCo|read online here]]. 

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======See also======

Landing page on [[planning:refurbishment_with_passive_house_components|refurbishments of existing buildings]]

Overview of [[certification:certified_passive_houses]]

[[:certification:enerphit:EnerPHit building renovation]]

[[phi_publications:nr.48_heat_losses_towards_the_ground#1.3 EnerPHit criteria for basements and building components in contact with the ground]]

[[:basics:affordability:investing_in_energy_efficiency:economic_feasibility_of_passive_house_retrofits:factors_that_influence_the_energy_balance_and_affordability_of_non-residential_enerphit_projects|]] {{:picopen:members_only.png?20}}

[[.:enerphit:nternational_enerphit_certification_criteria_for_energy_retrofit_with_passive_house_components|]] {{:picopen:members_only.png?20}}

[[.:enerphit:enerphit_article|Further publications on Passipedia related to EnerPHit]]

[[:passive_house_video:speakers_corner:passive_house_in_the_existing_building_stock]]

Fact sheets: 

  * {{:picopen:microsoft_word_-_06_fachinfo_schrittweise_modernisierung_sth.pdf|Step-by-step retrofit to achieve EnerPHit-Standard, the example of a single-family home}}
  * 
  * {{:picopen:microsoft_word_-_07_window_step_by_step_retrofit_kk.pdf|Windows in step-by-step retrofits - windows first, then insulation }}