Regensdorf in the canton of Zurich, a residential building
like many others across Switzerland,
with 190 apartments and built in the 1970s.
It is heated using natural gas and oil.
Andreas Küng is giving the owners advice concerning its renovation,
since the heating system is now rather outdated.
The building owners want a new system.
These are the heating facilities with two heating systems -
gas-fired and oil-fired with output of 750 kW.
This kind of system,
which supplies 190 homes in this building,
is common in Switzerland, especially the Swiss Mittelland.
If energy-saving targets are to be reached, renovation is necessary.
Yet far from all building owners are choosing to do so.
Only six cantons are even
implementing the regulations for building renovation that were
agreed upon by the cantons four years ago.
Do cantons need to be given even tougher restrictions
in order to meet the targets of the 2050 Energy Strategy?
We spoke to politicians on the Council of States' environmental committee.
The government is lacking in expertise within the building sector.
And I'm convinced that building owners
and tenants should be allowed to make the decision
for themselves, because
if it is not supported by the locals, then forcing the issue
is not the right thing to do.
I don't think that we need to take immediate action,
but perhaps the government should make some conditional decisions,
for example:
"If we've not made significant progress within ten years,
then we need to apply much greater pressure."
Ostermundigen in the canton of Bern.
This apartment building was renovated three years ago.
There was a leak in the roof, condensation on the windows,
resulting in colossal heating costs.
We left the oil-fired heating in place since it is relatively new,
but oil consumption has been
drastically reduced thanks to improved insulation.
Although they were sceptical at first, the tenants are pleased,
says the building's owner.
In terms of the costs involved, everyone benefits from it -
not forgetting the environment.
From an environmental viewpoint,
we now use just half of our previous energy consumption,
which means a 50% saving on our energy bills.
That represents an advantage for tenants.
So what does this mean for tenants on the whole?
It costs them more now.
On average, tenants pay around 200 francs gross more than before,
but they can save at least 100 francs on additional costs.
Rudolf Marti invested around 180,000 francs in upgrading
his building's energy systems.
Around 80,000 francs were funded by subsidies and tax deductions.
According to government estimates, Rudolf Marti will be able to save
over 260,000 francs on energy and operating costs over a 30-year period,
which will also benefit his tenants.
Back to Regensdorf near Zurich.
The 25-year-old natural gas heating system will soon need replacing.
So the question is: what's the best option?
Perhaps using thermal energy
from groundwater or the ground?
We're currently investigating whether we can use groundwater, since
the local authority has recently refused our request
to drill a borehole.
Now we're pursuing the option of using groundwater.
And if we have no other choice, we will probably have to install
a new oil-fired heating system.
There is new, better technology in that field,
but it's not ideal for us or for the building contractors.
These examples show that
upgrading energy systems is complex and therefore expensive,
but it can pay off in the long term,
even if some building owners
may at first be put off by the budgets involved.
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