The new RTS-75rooftop air conditioning system is available in two capacity ranges: 75,000 Btu/hr. IMACA and 90,000 Btu/
hr. IMACA. The system is also available with optioning heating coils, digital drivers display with AC system diagnostics, and can be supplied with a 12-volt or 24-volt electrical system. It can be used as a single AC unit on small and mid-size buses and by using dual units on full-size buses. ACT developed the RTS-75 by benchmarking existing similar rooftop units and based on market feedback from customers who stated what they liked about their existing rooftop units and what improvements they would like to see in a new small bus rooftop unit.