Timeline for Will running a dehumidifier in a basement impact room temperature?
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| Sep 20 at 20:35 | comment | added | Chris H | @Mark, No. You have to add that to the latent heat. But the power consumption is far less than the latent heat recovered (hence my ignoring the electrical power, and the order and emphasis of Jasen's points) | |
| Sep 20 at 19:46 | comment | added | Mark Ransom | @ChrisH if you know the power draw of the dehumidifier, the calculation will be much simpler. The power used by the dehumidifier will all eventually be turned into heat. | |
| Sep 20 at 9:22 | comment | added | Chris H | We can work out how much heat. The latent heat of vaporisation of water is 2,260kJ/kg, so per litre (=1kg) of water condensed (at room temperature) you get 2.26 MJ (about 0.63kWh in more familiar units). The specific heat capacity of air is 1.005 kJ/kg/°C or about 1.3 kJ/m³/°C. The biggest question is the size of the room. Mine is in a room approx 10×4×2.5m (100m³). Excluding losses my room could warm by 17°C for each litre condensed. In practice that takes 12 hours, in which time there's a lot of air exchange with the rest of the house, heat soaks into the walls, etc. so in practice not much | |
| Sep 20 at 5:29 | history | answered | Jasen | CC BY-SA 4.0 |