Weekly Product Gallery: DiversiTech, Testo, Rheem, Danfoss, Robertshaw and Schlage

This week’s product gallery spotlights a line of refrigerant locking safety caps, a hoseless and wireless refrigerant pressure probe, a modulating gas furnace, a link from HVAC drive to a building management system, a defrost timer for commercial refrigerators and freezers, and a voice-activated touchscreen deadbolt lock.

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