A．Every room has a heater.B．The Central room has a heater.C．A heat chamber heats air and passes the warm air through ducts and openings into rooms.D．The rooms are installed with blowers or convection.
A．Every room has a heater.
B．The Central room has a heater.
C．A heat chamber heats air and passes the warm air through ducts and openings into rooms.
D．The rooms are installed with blowers or convection.