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A year at the Lins’

A picture book by GLN, radiant heating and cooling

One flat in Wuhan, four seasons outside the window, and a living room that feels the same all year round.

  • Mum
  • Dad
  • Mei
  • Nainai, her grandma
  • Noodle, the cat
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The Lins' living room. Mum, Mei and Dad read on a green sofa. Nainai knits in a plum armchair by the GLN panel, Noodle the cat sleeps on a cushion, and a thermometer on the wall says 25°C. Through the big window you can see the magnolia tree and the city. 25°C GLN zzz

Spring

In March the magnolia outside opens, and Mei counts the petals that blow onto the sill. The thermometer on the wall says 25°C. Noodle is asleep in her usual spot.

Summer

By July the street shimmers at 37°C. Indoors, the panel by the window is cool to the touch. Nothing blows and nothing hums, and the thermometer still says 25°C.

The hottest night

At midnight it is still 31°C outside. Mei fell asleep halfway through the story, then Mum, then Dad. Nobody wakes up until morning.

Autumn

October brings the Mid-Autumn moon and the first cool rain off the river. The same panels that cooled the room in July now keep it warm. Nainai cuts the mooncakes.

Winter

January in Wuhan: 1°C, snow on the roofs and no city heating. Nainai’s feet used to be cold all winter. This year she sits by the panel, and her feet are warm.

How their home stays the same

Here is the Lins’ flat, opened up like a doll’s house.

  1. Out on the balcony, a heat pump warms or cools water.
  2. The water runs through the ceiling and down inside the wall, so no pipe ever shows.
  3. One fitting joins the panel, and the water flows through its slim aluminium fins.
  4. The panel settles the walls and floor at the right temperature. Heat moves by radiation, not by blowing air, and there’s no fan or compressor in the room.
The Lins’ flat cut open. A heat pump on the balcony sends water up to the ceiling and down inside the wall to one fitting on the panel. Mei holds out her hands to feel the warmth, and Noodle sleeps on the floor. 1 2 3 4

Why 25°C feels right

How warm you feel is roughly the average of the air around you and the surfaces you can see. Heating engineers call it operative temperature (ASHRAE 55, ISO 7730).

27°C air
22°C walls
about 24.5°C

So on a July afternoon, air at 27°C with walls at 22°C feels about 24.5°C. The panels cool the surfaces, so nobody has cold air blowing on their neck.

The panel by the Lins’ window

600 mm 1800 mm 90 mm
Model
Reed 18
Size
600 × 1800 × 90 mm
Fins
Aluminium
Cooling
About 420 W per panel
Heating
About 510 W per panel
Finishes
Paper whiteLeafPlum

Outputs are demo figures.

  • No vents and no ducts, anywhere in the system.
  • No fan and no compressor in the room. The compressor sits in the heat pump outside.
  • Pipes come down inside the wall and join the panel with one fitting, so none show.
  • No condensation water appears indoors.

Come and feel it

Our showroom in Wuhan has a living room like the Lins’, kept comfortable by GLN panels. Sit down for ten minutes, put your hand on a panel, and listen for a fan.

Bring a floor plan of your home and we’ll sketch where panels could go. A visit takes about 40 minutes.

Drawing of the GLN showroom: a shopfront with a striped awning, a window with a panel and an armchair inside, and a green door.
GLN showroom
2nd floor, 188 Zhongbei Road
Wuchang District, Wuhan
Tuesday to Sunday, 10:00 to 18:00
027 5988 1200
visit@gln.example

“We sat in the showroom for half an hour and forgot it was July.”

Chen family, Hanyang

Tell us when suits you and we’ll call to fix a time.

Your home

We only use your number to arrange the visit. This is a demo page, so the form doesn’t send anything.