Bedrooms
No fan noise at night and no air blowing across the bed, because there is no fan in the room.
This room is set to 26 °C.
Look through the lens. Blown air leaves a cold stream below the wall unit, a warm layer under the ceiling and a hot window. GLN cools and heats with water-filled panels instead, so the whole room settles close to one temperature.
Stock photo. Simulated thermal view, illustrative.
Two rooms, one setpoint
Both rooms are set to 26 °C on a July afternoon. As you scroll, the camera colours every surface cooler than a rising line, coldest first. In the room cooled by blown air the colour creeps in band by band. In the room with GLN panels it arrives almost all at once.
Cooled by blown air
Most of the room: 21.1 to 29.1 °C
The cold stream from the wall unit falls across the sofa, and warm air gathers under the ceiling.
Cooled by GLN panels
Most of the room: 25.4 to 26.6 °C
The panels cool the walls and ceiling directly. Nothing blows, so the air doesn’t split into cold streams and warm layers.
Simulated thermal views of stock photos, illustrative. Temperatures are demo values.
In summer, you are the warmest thing in the room
Skin sits at about 34 °C. At that temperature your body gives off infrared light that peaks near 9.4 µm, a wavelength your eyes can’t see and a thermal camera can.
Wien’s law: 2898 µm·K ÷ 307 K = 9.44 µm
Every surface around you trades this kind of heat with you. A GLN panel cooler than your skin takes more of this heat than it gives back, so you feel cooler without any air being blown at you. In winter a warm panel gives back more than it takes.
How the heat moves
From the heat pump outside to the sofa you sit on, in four steps.
Heat pump outdoorsWater out 18 °CIndoors no fan, no compressor
Pipes inside the ceiling and wallAt the panel one fitting
Panel 600 × 1800 × 90 mmOutput about 420 W cooling
Air 27.0 °CWalls 22.0 °CFeels about 24.5 °C
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Water is cooled or warmed outdoors
A heat pump outside the house cools water in summer and warms it in winter. Its compressor stays out there, so there is no fan and no compressor in the room.
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The pipes stay inside the wall
The water runs through the ceiling and comes down inside the wall. Each panel joins the pipe with a single fitting, so no pipework shows on the wall.
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A slim panel of aluminium fins
The panel is 600 × 1800 mm and 90 mm deep. Water runs through it and the fins bring its whole face to temperature: about 420 W of cooling or 510 W of heating per panel.
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The room settles by radiation
Walls, floor and furniture trade heat with the panel and settle close to one temperature. What you feel is roughly the average of the air and the surfaces around you: air at 27 °C with walls at 22 °C feels about 24.5 °C.
There are no vents and no ducts, and no condensation water appears indoors.
Rooms where you notice it
Three rooms through the same simulated camera. The people are the warmest thing in each, and the room around them reads as one colour.
Living rooms
Sit on the floor or the sofa without a cold draught on your neck or feet. The air by the floor is close to the air at head height.
Workplaces
Studies, studios and offices stay quiet enough for calls, and papers stay where you left them.
Stock photos, not GLN projects. Simulated thermal views, illustrative.
Stand in front of a working panel
Our Wuhan showroom runs panels in cooling and heating side by side, so you can feel the difference for yourself. Bring a floor plan if you have one and we’ll talk through which rooms suit panels and what a quote covers.
- Showroom
- Room 1208, 88 Zhongbei Road
Wuchang District, Wuhan, Hubei - Open
- Tuesday to Sunday, 10:00 to 18:00
- Phone
- 027 8765 4321
- A visit takes
- About 40 minutes