Open Doppel Cooling R290 propane unit with compressors visible

Photo: Mariusz Młynarczyk / CloudAir.tech

An open Doppel Cooling unit labelled "R290 Propan" shows its compressors and pipework to visitors. The backlit counter repeats "Wärmepumpen & Kaltwassersätze mit natürlichen Kältemitteln", and a blue patterned graphic promotes propane heat pumps and refrigeration systems. Brochures fill a rack on the right, and a wood-clad wall carries the company logo.