Greenhills School in Ann
Arbor Michigan has acheived a LEED Gold certification. The Bard Q-Tec 2 stage
geothermal heat pumps were used in many of the classrooms. These units are equipped
with internal energy recovery ventilation and controlled by CO2 sensors. These
units met the LEED requirement of an operating sound level of 45DB's in the
classroom. These units were all duct free, which means the sound levels of the
Bard product is very low.