Monel®|an alloy made of nickel, copper, iron, manganese, silicon, and carbon that is very resistant to corrosion. Runaround|a closed-loop energy recovery system in which finned-tube water coils are installed in the supply and exhaust airstreams and connected by counter-flow piping. Sensible|an air-to-air recovery device that transfers only _________ heat between the supply and exhaust airstreams. recovery|an air-to-air _________ device that can transfer both sensible and latent heat between supply and exhaust airstreams.