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Global brand best known for and portable air conditioners, not window units
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Offers a focused range of portable and a few window air conditioners
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Prioritizes ease of use, basic cooling, and brand recognition
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Not made in-house — Honeywell licenses its name to other manufacturers
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Decent performance and reliability, but limited features or innovation
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Great for buyers who want no-fuss cooling from a recognizable brand

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New York–based startup focused on design-forward, eco-conscious window ACs
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Currently offers a single product line in multiple BTU sizes (cooling only)
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Known for ultra-quiet performance, smart connectivity, and clean aesthetics
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Excels in urban apartments and modern interiors
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Limited product variety and premium pricing hold it back for broader use
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Ideal for style-focused renters and tech-savvy small-space users
Windmill Air Conditioners
Windmill is one of the youngest — and boldest — names in the air conditioner market. Launched by a team of New York natives, the brand set out to fix everything people hate about traditional window units: ugly boxes, loud fans, and headache-inducing installations. Their flagship product is a sleek, whisper-quiet window AC with Wi-Fi control, eco-conscious packaging, and an interface so minimalist it could pass for a Sonos speaker. But for all its design chops, Windmill is still a niche player with limited muscle — so let’s see where its sleek simplicity shines, and where it’s not quite ready for primetime.
Honeywell Air Conditioners
When you hear “Honeywell,” you probably think Portable humidifiers or Portable air purifiers — not window units. Honeywell’s air conditioner focus is squarely on portables, and even on their official website, you won’t find window ACs listed as part of their core lineup. Still, a handful of Honeywell-branded window units pop up through third-party retailers — and they stick to the same no-fuss, practical design that defines most Honeywell products. Some of their units are built by OEM partners rather than Honeywell itself. They don’t compete in the high-tech race, but their models deliver comfort in familiar, friendly packaging. So is it just a name play, or does the performance back it up?