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Products and innovations
A brief chronology
of the Mollardgasse
vocational college
1907: Saw the decision to build the
Mollardschule, according to the mayor,
Dr. Lueger –“As an honour and lasting
memorial to the 60 th Jubilee of Kaiser Franz
Joseph I”.
1911: The building was completed. The
building costs alone totalled 4 million
Krone. On 20 th October 1911, the
celebratory opening of the 1 st Viennese
Central vocational college building took
place.
1911/12: Came into full use at the
beginning of the academic year with 27
specialist further education colleges.
1914: Soldiers were billeted here from
August to November (because of the First
World War).
1915: A sick bay was housed in the school.
Post-war years: Quite a number of other
schools settled in the Mollardgasse and the
number of students increased to 9,200.
1925/26: 49 specialist colleges and
apprentice workshops were now located
here.
1942: During the National Socialist period
further education inspectorates and funds
were disbanded. Vocational college
education was limited to two years.
1944: Bombs destroyed around a third of
the building.
1945–1951: Saw the reconstruction by the
Vienna municipality.
1962: The school regulations were
altered: There followed the introduction
of nine compulsory school years and an
independent polytechnic course was
instituted in the Mollardgasse.
1975: A major reform of vocational colleges
took place: The result was a lowering of the
maximum number of students in a class,
laboratory instruction, division into groups,
compulsory subjects
and performance-related advancement.
1979/80: There were now 32,500
vocational students in Vienna. Additional
central vocational college buildings were
constructed to relieve the strain on the
Mollardschule.
1994–1999: Saw new buildings for the
assembly shop, sanitary and heating
engineering and the gymnasium. Roof
replacements and façade renovations were
also carried out.
2003/2004: The renovation of the whole
heating system began using HERZ fittings.
2005/2006: The comparative data for
energy consumption became available.
In the first year there was already an
absolute saving of 17%, and after two years
there was a 28.5% decrease in energy
consumption!
The comparison leaves us in no doubt
Aer the first heating periods the energy
used was compared with the previous
year’s data by the district heating body
Reading date Consumption
(MWH)
Reading date
Consumption
(MWH)
August 2003 0 August 2004 0
October 2003 358.85 October 2004 350.10
December 2003 954.26 January 2005 1212.17
February 2004 1334.36 February 2005 1143.84
April 2004 929.41 April 2005 514.05
April 2006* 1300.00
Season Consumption Heating costs Savings Difference
(MWh)
(€)
(MWh)
2003 - 2004 3756.88 233,928.-
2004 - 2005 3220.16 210,598.- - 669 ca. -17 %
2005 - 2006 1300.00 85,020.- - 358 ca. -40 %
Season Heating costs Savings Difference
Savings (€) (MWH)
2003 - 2006 - 338,695.- - 1026 ca. – 28.5 %
of Vienna, and a considerable energysaving
was determined following installation
of HERZ control fittings and the
hydraulic balancing of the equipment.
e total energy saving
amounts to an absolute value
of 28.5%.For similar projects
measured over a longer period,
energy savings of around
27% were determined.
By comparison, a 70 m2
apartment uses approximately
4MWH in a heating
quarter.
* Between April 2005
and April 2006 there
were no interim readings.
All values from
that heating period
were therefore counted
together to give a
direct comparison.
NEW: The HERZ 1 7262 00
thermostatic head for
increased flows
The new HERZ high lift head was developed
primarily for combination with TS-E thermostatic
valves with maximum flow for
single pipe and gravity equipment.
The field of application is in the
refurbishment and retrofitting
of central single pipe systems in
multi-storey buildings. e thermostatic
head is fitted with automatic frost
protection and the option of limiting
and locking of the set point. e hand
wheel is white.
e 1 7262 00 thermostatic head (high
li head) guarantees the high li of the
TS-E valve,
which means
a higher
flow with a
proportional
band of 2k.
Technical data
Item number 1 7262 00
Set value range: 8-25 °C
Connection thread: M 28 x 1.5
Storage temperature 55°C
(for the hand wheel in position “6”;
maximum 57 °C for two hours)
Transportation temperature 40 °C
(for hand wheel in position “*”)
HERZ TS-E kvs = 5.1 kv= 1.5 at 2k with a standard thermostatic head
kv = 2.2 at 2k with the HERZ 1 7262 00 thermostatic head
4 Summer/Autumn 2006