The archive · Product Ideas · Product decision · 2025
Hitachi's airCloset puts an air conditioner inside furniture — Red Dot Best of the Best
An air conditioner becomes tall storage furniture: louvre-free 'harmony line' vents release cool air from above and warm air from below.
Hitachi
What it had to solve
Most wall-mounted air conditioners disrupt the harmony of carefully designed interiors, and users say they want 'silent comfort' that matches how a room looks. Hitachi-Johnson Controls and the design agency TEAMS reasoned that a closet is large, tall and usually fixed against a wall — a ready-made shell for an HVAC module.
How it works
Most air conditioners on the market are boxes bolted to a wall, and no matter how well they cool a room they break its visual harmony. Hitachi-Johnson Controls Air Conditioning set out with the design agency TEAMS to answer what users describe as 'silent comfort' — climate control that meets visual preferences while minimising noise and visual intrusion.
airCloset starts from a spatial observation: closets are large and tall, and they are usually fixed against a wall, which makes them ideal places to house an air-conditioning module. The concept embeds the unit in that vertical storage furniture, with vertical vents running down the side of the storage space instead of traditional louvres. In cooling mode air is released from the upper section of the vents to fall evenly across the room; in heating mode warm air flows from the lower section and warms the space from the ground up.
Visually, the cabinet is a minimalist, standalone piece whose continuous front surface of 'harmony lines' doubles as the brand's design language. Because the system sits inside cabinetry, it stays discreet when inactive and only reveals itself when the room actually needs conditioning, while service access and performance are preserved.
The concept won Red Dot: Best of the Best in the Heating & Air Conditioning category of the Red Dot Award: Design Concept 2025, judged among visionary, forward-looking concepts. Lead designer Liu Yang summarised the intent: 'With its sophisticated design and advanced functionality, the airCloset enhances indoor comfort while elevating the aesthetic appeal of contemporary interiors.'
Why it lands
- The insight is spatial: a closet is tall, fixed and always present, so it can absorb a climate machine that no wall-mounted box can hide.
- Removing louvres allowed one continuous 'harmony line' surface, turning an appliance into a piece of interior design with a brand signature.
- Letting physics do the distribution — cool air falling from above, warm air rising from below — means comfort without visible moving parts.
- Presenting the concept as part of a furnished room lets buyers imagine the product in their own interiors instead of judging a bare appliance.
What it did
airCloset won Red Dot: Best of the Best in the Heating & Air Conditioning category of the Red Dot Award: Design Concept 2025, while the companion airHive concept — HVAC reimagined as modular ceiling tiles — earned a Red Dot Design Concept award. Red Dot's own magazine profiled airCloset as an example of turning unnoticed everyday systems into design questions.
What you can take
Design opportunity hides in the appliance everyone tries to conceal: putting the air conditioner inside the furniture changes what a room looks like, where air goes and how the brand is perceived.
Since then
airCloset and airHive were published as Red Dot Award: Design Concept winners for 2025, airCloset taking Best of the Best in Heating & Air Conditioning and airHive a Design Concept Award. Hitachi-Johnson Controls continued its collaboration with TEAMS on experience-led concepts such as AirPure. Because both projects are concepts rather than products in production, their early effect is on brand perception and product direction: positioning air conditioning as part of the architecture of design-conscious homes.
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