Subject
energy conservation
84
building
65
energy efficiency
12
energy consumption
9
space heating
9
air conditioning
5
energy supply
5
civil engineering
4
cost factor
4
energy
4
new federal country
4
old federal country
4
standard
4
automation
3
carbon dioxide
3
energy management
3
energy production
3
solar energy
3
building material
2
condensation
2
dwelling
2
emission
2
energy balance
2
energy policy
2
energy system analysis
2
heat production
2
heating system
2
human behavior
2
passive solar cooling
2
passive solar heating
2
thermal insulation
2
biomass
1
business studies
1
carbon dioxide production
1
coal gasification
1
computer simulation
1
contract
1
data management
1
district heating
1
ecology
1
economic analysis
1
economic aspect
1
economics
1
ecosystem
1
energy conversion
1
energy economy
1
energy loss
1
energy research
1
energy system
1
energy technology
1
more ...