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house

house. Cold outside air. house. Cold outside air. Heat loss. house. Cold outside air. Heat loss. house. heater. Cold outside air. Heat loss. house. Heat input. heater. Cold outside air. Heat loss increases as the difference between inside & outside increases. house. Heat input.

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house

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  1. house

  2. Cold outside air house

  3. Cold outside air Heat loss house

  4. Cold outside air Heat loss house heater

  5. Cold outside air Heat loss house Heat input heater

  6. Cold outside air Heat loss increases as the difference between inside & outside increases house Heat input heater

  7. Cold outside air Heat loss increases as the difference between inside & outside increases house heater Heater output and thermostat feedback to each other. When thermostat registers that the house temperature is below its setting, the heater turns on. When house temperature registers higher, the heater turns off.

  8. Do you want to try to invent formulas for a spreadsheet that calculate the heat input, heat loss, and change in temperature? • Yes -- on paper first (alt. address) • Directly into a s’sheet (alt. address) • Skip this Heat loss increases as the difference between inside & outside increases When thermostat registers that the house temperature is below its setting, the heater turns on. When house temperature registers higher, the heater turns off.

  9. Cold outside air house heater Thermostats turn the furnace off as soon as they register that the set temperature has been reached. Q: What happens if the thermostat only registers the temperature every minute? Every two minutes? Every four minutes?… Try it on paper? Or on your s’sheet? Or on mine?

  10. Cold outside air house heater Normal heaters pump in heat at a constant rate each minute, but some people act as if they pump in more heat when the thermostat is set higher than it needs to be. Q: What might happen if you had a heater like that? Try it on paper? Or on your s’sheet? Or on mine?

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