supply

outside

fan

rotating

power

conditioning

rooftop

hightech

heater

typical

autonomous

source

air

spinning

panels

condenser

appliance

fuel

photovoltaic

house

green

hvac

ventilation

cells

sustainable

cooling

affordable

solar

economical

electricity

sun

renewable

alternative

roof

home

generator

compressor

utility

unit

energy

investing

residence

building

ac