Ses­sion 5

Ses­si­on 5: En­ergy con­sult­ing for build­ings in Ger­many

Sat­urday, 11 Sep­tem­ber 2021


This ses­sion presents the full range of sav­ings that can be achieved in Ger­many through ef­fi­ciency im­prove­ment meas­ures in ren­ov­a­tion and new con­struc­tion. Which con­struc­tion meth­ods pay off in the long term? Which stand­ar­ds can be achieved in the con­text of ren­ov­a­tions? The speak­ers will de­mon­strate ef­fect­ive solu­tions based on suc­cess­fully im­ple­men­ted pro­jects and re­port on their ex­per­i­en­ces from en­ergy con­sult­ing for build­ings of all classes in Ger­many.


Time (CEST) Top­ic Speak­er            
10:00 am Wel­co­me
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Hartmut Murschall

10:05 am

En­erPHit ret­ro­fit for Plus En­ergy House

An ap­prox­im­ately 50 year old build­ing was ret­ro­fit­ted to make it a Plus En­ergy build­ing. This was done by modi­fy­ing the thermal build­ing en­vel­ope and the build­ing ser­vices us­ing ex­ist­ing tech­niques. The out­er areas of the build­ing are used for sol­ar en­ergy pur­poses. En­ergy bal­an­cing res­ults in sub­stan­tial en­ergy sur­pluses.


Gerald Lange | Fachhochschule Südwestfalen

10:20 am

Mod­el pro­ject: sus­tain­ably trans­form­ing ex­ist­ing old single-fam­ily homes in­to premi­um Pass­ive multi-fam­ily hous­ing

Des­pite in­con­veni­ent con­di­tions, the al­most 100-year old, multi-use build­ing meets the highest Ef­fi­ciency House/Pass­ive House Premi­um new build stand­ar­ds by de­mon­strat­ing a hugely in­creased per­form­ance rate per per­son. As a mod­el pro­ject, it pro­motes the fur­ther de­vel­op­ment of fu­ture re­fur­bish­ment and sub­sidy stand­ar­ds. 

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Bernd Steinmüller | BSMC


10:35 am

Ret­ro­fit­ting a gym­nas­i­um with TES façade ele­ments

Dieter Herz | Herz&Lang GmbH - Die Planer für energieeffizientes Bauen
10:50 am Ques­tion and An­swer  

11:10 am

User sat­is­fac­tion versus air qual­ity – vent­il­a­tion in classrooms

The ren­ov­a­tion of the Det­mold Vo­ca­tion­al Col­lege was ac­com­pan­ied by mon­it­or­ing and user sur­veys. Based on the res­ults of these sur­veys, ad­di­tion­al mois­ture loads are ne­ces­sary to en­sure a hy­gi­en­ic, com­fort­able in­door cli­mate in the winter, as well as ad­equate mois­ture in the air and ap­pro­pri­ate con­tam­in­ant and CO2 con­cen­tra­tions.

Susanne Schwickert | TH OWL, Institut für Energieforschung
11:25 am

Com­par­ing BEG and the En­erPHit Stand­ard based on a single-fam­ily home

The ef­fi­ciency house re­quire­ments of BAFA and KfW dif­fer in some cases sig­ni­fic­antly from the re­quire­ment val­ues of the En­erPHit stand­ard defined by the Pass­ive House In­sti­tu­te. This has a neg­at­ive im­pact on the achieve­ment of cli­mate tar­gets and en­ergy costs - who pays?!

Susanne Theumer | Passivhaus Institut

11:40 am

Does qual­ity as­sur­ance of en­ergy-ef­fi­cient design help re­duce con­struc­tion costs?

Par­tic­u­larly en­ergy-ef­fi­cient con­struc­tion and ren­ov­a­tion is needed as a res­ult of the tar­get to be­come cli­mate-neut­ral by 2040, re­du­cing en­ergy by 50% for the over­all build­ing stock in or­der to achieve near-zero-en­ergy stand­ar­ds. From an eco­lo­gic­al and eco­nom­ic per­spect­ive, it can no longer be jus­ti­fied to fol­low a less­er stand­ard than that of the Pass­ive House or Pass­ive House Plus, es­pe­cially when con­sid­er­ing in­vest­ment costs and sub­sidies. 

Axel Bretzke | Hochschule Biberach
11:55 am Ques­tion and An­swer  

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