The room that switches its heat.

Why does a thermostat switch above and below the setpoint?

Setting up the mechanism…

Room temperature: 16.00°C
Heater output: 0.00W
Heat loss outdoors: 1100.00W

Contact transitions: 0

Fit sensor, switching contact and room heater

Why does a thermostat switch above and below the setpoint?

The sensor compares room temperature with a band around the target. It turns the heater on below the band and off above it, while the room continuously loses heat outdoors.

C dT/dt = Pheater − UA(T − Tout)

What this model simplifies

Lumped room: heat capacity 80000 J/K, heat loss coefficient 100 W/K, ±0.5 °C switching band. Exact 1 s exponential thermal steps for a selected elapsed interval, not a building energy forecast.

Read the source · energy.gov ↗

Put it to work.

Hold the room within 0.6 °C of 22 °C and complete at least one on/off cycle.

Make it work.

Hold room temperature near the setpoint.

Run

Fine adjustments 5

Set temperature°C

Initial room temperature°C

Outdoor temperature°C

Heater powerW

Elapsed heating times

The room that switches its heat.

Why does a thermostat switch above and below the setpoint?

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Figuvo

Understand by doing.

Understanding is something you do.

Figuvo is a place to look inside everyday things, build a connection, and discover the idea behind them.

177 interactive experiments. Each has a working model and a challenge to test what you found.

The original inspiration

Levers & fulcrums The surprising gyroscope The field cannon Inside the human body

Original demonstrations by The Bugged Dev. The teaching models and interactions here are new implementations.

Community builds

New teaching models inspired by public builds shared around Anatomy.

Anatomy · the original announcement How a rocket pushes through space · Gustavo Inside a tactile key switch · @retaqib Pressure through the coffee bed · Gustavo The overbalance wheel · Shawn A seconds pendulum clock · @Baconbrix Three feet on the ground · Soju Inside a layered particle detector · Yash A double-deck pressure cabin · Charlie Leave the spent booster behind · @quantapar Principal, interest and escrow · Sean Gear a Martian year · @samani_Two balls in, two balls out · @samani_Two slits, one probability pattern · @samani_Join through a clear plastic cover · Josh Brown Lay pipe without a sharp bend · @Phi10w Eight cylinders and a blower · @love4hxns Four columns under a Joglo roof · Nur Asyrof An office for dependent tasks · Yaroslav Yablonski One image, six editable layers · Meng To The Redis caching machine · @uviii_03 Inside the Sony CMD-J5 · Ann Afterburner thrust stand · Joshua Guo Open-back headphones · Surajan Shrestha Two-thread lockstitch machine · @slashui Signal factory · Dhruval Golakiya

Architecture

The room that switches its heat.

Why does a thermostat switch above and below the setpoint?

Setting up the mechanism…

Room temperature: 16.00°C
Heater output: 0.00W
Heat loss outdoors: 1100.00W

Contact transitions: 0

Fit sensor, switching contact and room heater

Why does a thermostat switch above and below the setpoint?

The sensor compares room temperature with a band around the target. It turns the heater on below the band and off above it, while the room continuously loses heat outdoors.

C dT/dt = Pheater − UA(T − Tout)

What this model simplifies

Lumped room: heat capacity 80000 J/K, heat loss coefficient 100 W/K, ±0.5 °C switching band. Exact 1 s exponential thermal steps for a selected elapsed interval, not a building energy forecast.

Read the source · energy.gov ↗

Put it to work.

Hold the room within 0.6 °C of 22 °C and complete at least one on/off cycle.

Make it work.

Hold room temperature near the setpoint.

Run

Fine adjustments 5

Set temperature°C

Initial room temperature°C

Outdoor temperature°C

Heater powerW

Elapsed heating times