英文關鍵字
adjust
adjusting
adjustment
appliance
central
closeup
cold
comfort
consumption
control
costs
domestic
economical
economizing
economy
energy
equipment
expensive
hand
heat
heater
home
hot
house
household
interior
knob
maintenance
metal
modern
object
off
power
radiator
reduce
regulator
room
saving
season
system
temperature
thermostat
thermostatic
turning
valve
wall
warm
warmth
white
winter