BlueBox SIGMA Zero indoor unit in front of propane unit display
Photo: Mariusz Młynarczyk / CloudAir.tech
A BlueBox SIGMA Zero indoor unit with control switches and a glazed side panel stands in front of a sign reading "The new generation of natural refrigerant propane units" under the Mission Zero Emission logo. Behind it, a large air-cooled unit with dark finned coils and blue fan housings rests on a white plinth.
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