In 2008 a variable frequency drive air compressor was installed at the Nazareth facility. This replaced the oldest of three original 150 hp air compressors. This compressor ties into the duct work above it, converting the exhaust air to heat for the Martin Guitar mechanical room during the winter months and hot water for heating office areas throughout the entire year.
A 50 hp variable frequency drive air compressor was installed at Martin's Navojoa, Sonora, Mexico manufacturing facility in 2005. This installation served as the prototype for the 150 hp version installed in Nazareth. A second 50 hp variable frequency drive air compressor is scheduled to be installed in Navojoa in Fall 2010.