Dehumidifiers

[PeteTheOAP]

How does a dehumidifier work?

[wildwood]

Gas in the coil (radiator) is pressurised and so becomes extremely cold, pretty much like when you shake a can of softdrink, the ambient air is blown over the coil and the moisture in the air condensated on the coil because that is colder than the air. A sensor periodically switches the pressurising pump off and the condensation which has turned to ice melts and runs in the water reservoir. Then the cycle starts all over again. You can get a surprisingly large amount of water out of a damp room/house.

Someone else may have an easier explanation.

[gingejbee]

Easier version: Cold surfaces are produced in the unit (the same as in a fridge) and the damp air is drawn over it. The moisture condenses on the cold surface and is collected in a vessel that you have to empty.

[Mrsspagnoli57]

We have had a dehumidifier for years-its amazing just how much moisture there is in a house (ours was built around 1948) Wouldn't be without one now-we empty the water into our water butt outside for use in summer (when we get one) and have also found that we suffer less colds as it rids the air of spores that can cause them.