FLOATGEN is co-financed by the European Commission’s 7th Framework Programme for Research and Technological Innovation.

This project has received funding from the European Union’s Seventh

Programme for research, technological development and demonstration

under grant agreement No 609019

Passive House: A Smart City Solution

Case Study: Innsbruck, AustriaGiorgia Tzar

Passive House Institute

Rheinstraße 44 | 46

64283 Darmstadt, Germany

info@passivehouse-international.org+49(0)6151 826 99 55

EnerPHit Step-by-Step Retrofit

Innsbruck and Passive House

▪ 2009: MFH Lodenareal (At the time of building it was the largest PH in the world)

▪ 2010: Passive House Institute, Innsbruck location opened

▪ 2010: Housing company Neue Heimat Tirol (NHT) decided to use the PH Standard in all new

builds

▪ 2010-2014: Retrofit of University of Applied Sciences

▪ 2012: First PH Supermarkets

▪ 2015: As developer for the city of Innsbruck, Innsbrucker Immobiliengesellschaft m.b.H set itself

the goal of building and/or retrofitting all of its new projects to the Passive House Standard

▪ 2016: Campagne-Areal: A further 1,000 PH apartments and commercial buildings planned in the

next 10 years.

▪ 2017: NHT has 4500 PH dwellings with 600 more planned.

▪ The SINFONIA project began in 2014 and is a five-year initiative to deploy large-scale, integrated

and scalable energy solutions in mid-sized European cities.

▪ As a demonstrator city, Innsbruck will refurbish 66,000m² of residential and public buildings from

the 30s-80s- improving indoor quality and energy performance, and reduce final energy demand

by up to 80%.

▪ They will achieve this with EnerPHit Step-by-Step retrofits.

Sinfonia Smart City Project

ATP/Thomas Jantscher

181 170150

72 72

181

146117

25 250

20

40

60

80

100

120

140

160

180

200

until 2016 -Existing Building

2016 -Windows + ventilation

2028 -Basement ceiling +

roof + PV

2040 -External walls +Entrance door

next 50-100 years -replacements ofheating system

Speci

fic

Heati

ng

dem

and

[kW

h/m

²a]

SHALLOW RETROFITS DEEP RETROFITS

Key Challenges

NHT, Innsbruck

▪ Inhabited-state retrofits

▪ Tenants refusing retrofit steps

▪ Tenancy laws

Before After

▪ DistrictPH: Tool developed to assess and optimise city districts in terms of energy efficiency. It

calculates detailed energy balances for buildings within the neighbourhood,

▪ Retrofit consultancy for housing companies.

▪ Building energy efficiency monitoring.

▪ Tenant cooperation efforts.

▪ Electro Energy Efficiency of household appliances monitoring and energy consultation.

Step-by-Step retrofit

Key Activities

Gaps

▪ Funding for retrofits is often short-term – barrier to step-by-step retrofits.

▪ Affordable and accessible energy efficiency consulting is often missing.

▪ Data that is needed to plan a smart city is often missing.

▪ Involving tenants effectively throughout the process must be a priority.

▪ Building activities are time consuming.

Conclusions

▪ District refurbishments on a large scale cannot be carried out all at once, so the "step-by-step

EnerPHit refurbishment" is ideal.

▪ A comprehensive refurbishment plan is necessary to understand the lifecycle costs, avoid lock-in

effects and plan accordingly.

▪ District PH was developed to depict larger districts’ energy consumption and future developments

based on refurbishment choices.

▪ Involving tenants and making sure there are no legal or financial barriers is enormously important.

DistrictPH