Coway is a South Korean home appliance manufacturer based in Seoul, best known outside Korea for its Airmega air purifiers, along with water purifiers and bidets. Its purifiers pair a washable pre-filter with activated carbon and True HEPA media, report air quality through a coloured indicator ring and the IoCare app, and support Amazon Alexa and Google Home. Most Airmega models are AHAM Verifide and Energy Star certified.
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Hong KongRefoss is a smart home brand active since 2016, best known for its multi-channel energy monitors and for smart plugs, switches and garage door openers. Its energy monitors clamp onto the mains and branch circuits and expose the readings through a local web UI, an open JSON-RPC API and MQTT, so they run without any cloud account. Refoss devices integrate natively with Home Assistant, Alexa, Google Home and Apple HomeKit.
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