The revolutionary MACH 8 PLUS models have the lowest aerodynamic profile of any rooftop unit in the industry. The ultra-low profile MACH 8 PLUS has an industry exclusive fiberglass basepan that provides superior strength and durability while reducing weight. Although the profile may be small, it continues to outperform all competitive models. Two motors deliver the same BTUs of cooling on both High and low speeds. The MACH 8 PLUS has the highest air flow on high speed and is ultra-quiet on low speed for night time cooling.