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ELAS – Calculator
Decision Tree
Decision tree
The decision tree provides the possibility for finding a suitable heating supply for the settlement by means
of yes/no decisions. Intentional preference is given to energy efficiency and ecological network solutions
in establishing this. The decision tree was developed within the scope of the PlanVision Project (Climate
and Energy Fund, programme “NEW ENERGIES 2020 - 1. tender”).
START
Decision level - Municipality
Industrial waste heat for
district heating already
utilized?
Yes
Yes
Legend
Industrial waste heat
potential?
No
Decision point
No
Heat occupancy of
the supply area
>900 kWh /
running metre?
Technology decision
Yes
District heating
grid available?
Yes
No
Yes
No
Covering of
increased heat
demand with
existing system
possible
Yes
Possible
construction of a
district heating
grid?
Additional
customers available
to reach 900 kWh /
running metre ?
No
No
No
Biogas
driven ?
Yes
Yes
Extension
possible?
Renewable based ?
No
District heating
(renewable)
No
No
No
Possbile switch to
renewable based fuel?
Yes
Additional
customers available
to reach 900 kWh /
running metre ?
No
Yes
Gas network
connection
(fossil)
Extension
possible?
Decision level - Settlements
Introduction of a
micro-network
within the
settlement ?
Yes
No
Yes
No
Yes
Heat occupancy of
the supply area
>900 kWh /
running metre?
Gas network
connection
(renewable)
No
Possbile switch to
renewable based
fuel ?
District heating (fossil)
Yes
Yes
Yes
Gas distribution
system
available?
No
Increased
demand can be
fulfilled ?
Yes
Wood logs or Wood
chips burner
+
Solar thermal
No
No
Yes
Wood logs or Wood
chips burner
Storage capacity
available ?
(fuel storage
room,...)
Yes
Wood pellets
+
Solar thermal
No
Gas-driven
micronetwork?
No
Yes
Biogas
(gas burner on consumer side )
Wood logs or Wood chips burner
+
Solar thermal
(central, small heat supply station)
Wood pellets
Photovoltaics +
Heat pump
Wood logs or Wood chips burner
+
Solar thermal
(decentral, customer side)
Wood logs or Wood chips burner
PlanVision - Decision tree
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Decision Tree