A、EvEry room hAs A hEAtEr.
B．thECEntrAl 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.