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CHAPTER 11
ECOLOGICAL LIVING
"Subsidies were provided for the installation of condensing boilers in 269 homes in
2007." –
MA 25 - Town renewal and residential test section
"We have used thermal home renovation ("Thewosan") in around 43,000 homes
to reduce the heating requirement." –
MA 50 - Home subsidies and arbitration section for residential matters
"By installing sun collectors for hot water and to support heating
at Hugo Breitner Hof we have saved an additional 10 tonnes of CO2". –
Community-owned Apartments (Wiener Wohnen)
Ecology
when building homes
Subsidised Vienna homes combine economic with planning and ecological objectives.
Low energy homes and innovative environmental technologies are already standard
for many new buildings. Now activities are increasingly concentrating on renovations
and on lowest energy and passive homes. The key to ecological homes in Vienna is
publically tendered developer competitions.
Avoiding halogenic hydrocarbons
Construction materials that contain halogenic hydrocarbons, KPS insulation plates or
PU assembly foam have not been permitted in subsidised homes since 1999. Noise
protection windows in subsidised homes are no longer filled with full sulphur
hexaflouride.
Passive house estates
The City took the next step towards protecting the climate with several passive homes
in 2007. At 15 kWh/year/m2 these require only one third of the energy of low energy
homes.
The subsidised passive homes implemented to date include:
1020, Molkereistraße: hall of residence, in use since 2006, high satisfaction level
according to evaluation study
1210, Mühlweg, Part C, mixed wood construction
1210, Rudolf-Virchow-Straße 12
1110, Pantucekgasse, combined with geothermals
1110, Dreherstraße 66
1140, Utendorfgasse 7
1220, Eßlinger Hauptstraße 17
1230, Anton-Heger-Platz 4
Other passive homes - including the EUROGATE project, Europe's largest passive
home project with more than 700 flats - are being planned or are in construction.
Passive homes already constructed are to be comprehensively analysed in 2008.
Thermal home renovation
Since 2000 the city has subsidised reducing the need for heating by "Thewosan" thermal home renovation. By the end of 2007 around 500 properties with 43,000 flats
and total construction costs of €410 million were completed. A further 400 properties
with over 30,000 flats are currently in planning. This results in energy savings to date
of around 269 Gwh or a reduction in CO2 emissions of 97,000 t per year, together
with other renovation measures (foundation renovation etc.) even around 220,000 t the average annual consumption of 150,000 cars.
RUMBA guidelines for environmentally friendly construction
sites
With the "RUMBA" project the city of Vienna is following a strategy whose extent is
unique in Europe to reduce the environmental effects of construction sites. RUMBA
was tested and comprehensively evaluated at the District 11, Thürnlhofstraße
construction site as a pilot project.
RUMBA focuses on:
•
Optimising construction site traffic through logistics management
•
Railway rather than road for transporting materials
•
Subsiding low pollutant lorries
•
Removal restriction for excavations
•
Sorting island for separating waste
•
Environmental management (surfaced construction roads, covering and
draining dust producers)
As part of the monitoring by Vienna Residential Research the scope and type of
deliveries were assigned to the individual properties being constructed.
The recommendations of the expert group are currently being implemented in the
following areas:
•
Environmental and construction logistics coordination should be inserted into
the Construction Coordination Law.
•
Appropriate tender documents for developer competitions
•
Setting up and maintaining construction logistics centres, e.g. the port of
Vienna (Wiener Hafen)
•
Tender examples for RUMBA Guideline (www.rumba-info.at )
Overall renovation activity
by Wiener Wohnen 2006/07
The first council housing with solar systems – Hugo Breitner Hof, Vienna 14,
The Hugo Breitner Hof estate in District 14 was built between 1949 and 1956 over an
area of 16.3 hectares; the estate covers 130 buildings and 1,300 flats. In October 2000
comprehensive renovation started. Renovating council homes is always a challenge
for those managing the process as it takes place with full occupation, i.e. the tenants
continue living there. As part of this renovation a heat insulation system was attached
to the external walls and the windows were exchanged. In addition to fixing insulation
to the top ceiling, these measures represent traditional energy renovation by
Community-owned Apartments (Wiener Wohnen).
But in this case 200 new flats were created by extending the top floors which also
increased the compact nature of the estate and thus sustainably improved the energy
parameters of the homes.
From a technical perspective, in addition solar collectors were installed on theroofs to
supply the attic flats with hot water and support the heating system in winter. This
action can save an additional 10.4 tonnes of carbon dioxide.
ECO subsidies for small volume home development
Heat pumps
The City of Vienna is encouraging the use of heat pumps by eco-subsidies. In the
period under review air/water heat pumps, water/water heat pumps and solar/water
heat pumps were subsidised. There is currently a clear trend to heat pumps with
vertical collectors. In 2007 systems for a total of 151 residential units were subsidised.
The subsidies provided totalled around €813,000,000.
Improving new construction materials
In order to make saving energy attractive subsidies are provided for improving the
materials used for new construction. Subsidies of around Ä1,089,000 were used for
low energy and passive homes as well as for ventilation systems for reusing heat. The
number of subsidised homes totalled 144.
Gas condensing boiler subsidies
In order to reduce the use of primary energy the use of gas condensing boilers was
subsidised in new homes. Subsidies totalling around Ä 404,000 were provided in 2007
for systems in 269 homes.
Fixed position solar systems
Solar energy aims to reduce energy imports, improve the environment and protect
resources.
Subsidies are provided by granting one-off, non-repayable investment cost subsidies.
The subsidy for setting up a solar system to heat water is 30% of the investment costs
that can be subsidised.
There is a minimum of Ä1000 and a flat sum of €70.00 per m2 of absorber area.
The subsidy for setting up a solar system to heat water with room heating support is
40% of the investment costs that can be subsidised.
There is a minimum of €1000 and a flat sum of € 100.00 per m2 of absorber area.
Natural people and legal entities that have evidence of appropriate solar use may make
an application.
In the 2006 administration year 3,556.48 m2 of collectors were installed; this
corresponds to an increase of around 70% over 2005 (2,066.06 m2), and €748,055.74
was paid out for 289 subsidy applications.
The City of Vienna constructed water heating systems using solar-thermal equipment
in 2006 in the Vienna 23 nursery, Johann-
Hörbiger -Gasse 43, Vienna 7 Council
Office, Hermanngasse 24–26 and Vienna 7 school, Neu-stiftgasse 100.
In the 2007 administration year 4,247.30 m2 of collectors were installed; this
corresponds to another increase of around 20 % over 2006 (3,566.48 m2), and
€840,438.73 was paid out for 331 subsidy applications.
In 2007 the City of Vienna installed hot water systems using solar-thermal equipment
in Vienna 23 school, Anton-Baumgartner-Straße 119 and the business premises of
MA 49 in Am Cobenzl, Vienna 19.
This subsidy measure is based on a council resolution for two years, whereby for 2006
and 2007 around EUR 1 million was available as the budget for solar-thermal
systems.