Tronair offers another innovative solution, a Pre-Conditioned Air (PCA) combo unit. The engine driven, air conditioning/heating/ground power unit was designed to service regional aircraft. The mobile unit has a Tier 3, 80 kW, engine driven diesel generator. The generator powers a 20 ton air conditioner, a 36kW heater, and a 400 A continuous/1600 A starting 28.5 VDC ground power unit.