Mitsubishi Electric Trane HVAC US LLC has expanded its lineup of CITY MULTI N-Generation single-module outdoor units for R2-Series and Y-Series. The newest single-module units improve energy efficiency, have a smaller footprint and offer more personalized comfort control. The units are available in 16-, 18- and 20-ton capacities. The larger-capacity options limit the need for twinning, allowing for single-module connections and smaller footprints where space is a premium concern. The expanded lineup also allows for twinned connection of R2-Series units up to 36 tons. Available in the N-Generation High Efficiency tier, the units incorporate flash injection technology to heat continuously through defrost and may deliver 78 percent of rated heating capacity in ambient temperatures as cold as -13 F.