Discussion
You could argue that the volume being heated needs (fractionally) less power to heat it, but conversely it will cool down faster, so no net gain. Then add the power used to run the DH... so overall effect I think is you lose money but the dehumidifier salesman gets a sale. And you will need to drink more.
Where did you get this idea?
Where did you get this idea?
The big question is, how dry is your house at the moment? Do tea-towels etc take a long time to dry (a) or not (b), does paper feel soft(a) or is it crispy(b)? These are things that will give you some idea as to the desirabiltiy of dehumidifying. If the answers are a then a dehumidifier would be a useful addition. If not, don't bother.
Surely the air coming out of a dehumidifier is colder than the temperature of the surrounding area?
The water is collected by passing air over a cold condensing plate and so the air leaves colder than when it enters.
If my house isn't warm then the dehumidifier doesn't work as the plate isn't colder than the surrounding area
The water is collected by passing air over a cold condensing plate and so the air leaves colder than when it enters.
If my house isn't warm then the dehumidifier doesn't work as the plate isn't colder than the surrounding area
AndyClockwise said:
Surely the air coming out of a dehumidifier is colder than the temperature of the surrounding area?
The water is collected by passing air over a cold condensing plate and so the air leaves colder than when it enters.
If my house isn't warm then the dehumidifier doesn't work as the plate isn't colder than the surrounding area
Does the air not pass over the evaporator/evaporative plate of the The water is collected by passing air over a cold condensing plate and so the air leaves colder than when it enters.
If my house isn't warm then the dehumidifier doesn't work as the plate isn't colder than the surrounding area
system not the condensing plate?
Deva Link said:
Can you tell me the room temperature and humidity and the rating and efficiency of the dehumidifier?
You do not require that information as the question was not about a specific dehumidifier ???? I asked what was the amount of heat added by the condensor when the air was blown over it or are you telling me that this varies per unit?How is this controlled ?
When water is returned from vapour to liquid it gives up its latent heat of evaporation, so there is a degree of heat recovery with a dehumidifier, although the energy consumed by the compressor will tend to offset any savings.
The simple answer is, if your house is damp then you need one, and if it isn't, you don't.
The simple answer is, if your house is damp then you need one, and if it isn't, you don't.
singlecoil said:
When water is returned from vapour to liquid it gives up its latent heat of evaporation, so there is a degree of heat recovery with a dehumidifier, although the energy consumed by the compressor will tend to offset any savings.
The simple answer is, if your house is damp then you need one, and if it isn't, you don't.
Kablammo.....Nail right on the head The simple answer is, if your house is damp then you need one, and if it isn't, you don't.
squeezebm said:
Deva Link said:
Can you tell me the room temperature and humidity and the rating and efficiency of the dehumidifier?
You do not require that information as the question was not about a specific dehumidifier ???? I asked what was the amount of heat added by the condensor when the air was blown over it or are you telling me that this varies per unit?How is this controlled ?
If the cooling capacity is for arguments sake 1Kw, then the heat output would be about 1.2Kw. But what it actually is will depend on conditions in the room, size of unit, refrigerant gas used etc etc.
There is no control over it unless there is a vent to get rid of the heat or a remote condensing unit/coil, but you wont get that on a cheap domestic unit.
Obviously based on a compressor driven refrigerant type dehumidifer.
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