environmental
building
business
certificate
class
classification
concept
conservation
construction
consumption
design
development
eco
ecofriendly
ecological
ecology
efficiency
efficient
element
energy certificate
energy efficiency
energy performance
energy rating
environment
estate
friendly
graph bar
graphic
green
heat
home
house
illustration
improvement
insulation
label
leaf
performance
power
rating
real
saving
sign
sustainable
symbol