Aranet, a brand of SAF Tehnika in Latvia, makes wireless sensors best known for the Aranet4 CO2 monitor. Its devices use long-range, low-power radio to track CO2, temperature, humidity and pressure, with long battery life and an E-ink display. Aranet is widely used in offices, schools and homes for reliable, accurate CO2 monitoring.
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United StatesCielo is an American company based in Bellevue, Washington that builds smart climate control products for both ducted and ductless HVAC systems. Its Cielo Breez line turns mini-split, window and portable air conditioners that use an infrared remote into wall-mounted smart thermostats, while the Cielo Smart Thermostat range covers central heating and cooling. Everything runs through the free Cielo Home app with no subscription fees, and the devices work with Amazon Alexa, Google Assistant, Siri Shortcuts, SmartThings, IFTTT and Home Assistant.
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