Dehumidifier vs venting.

[beachbum73]

Those are a similar product, i have nine of the panels, they each have 5 vacuum tubes to a panel, i expect i will be using no kore than about 6

[TTS North]

Thinking about all the good comments my thoughts are:

 

I have

 

- a belting heat source (but it costs.)

- easily enclosed space.

- power

- ventilation.

 

Rather than waiting for a long time for a dehumidifier to do it's thing I could invest not much more in something like -

 

.:SALE:. Heat Recovery Unit/Fan Whole House Ventilation System Only 20 left | eBay

 

and some insulation.

 

Air flow is free! As long as I can keep as much of the heat in the system as possible it may not be too expensive to run.

[TTS North]

Thinking about all the good comments my thoughts are:

 

I have

 

- a belting heat source (but it costs.)

- easily enclosed space.

- power

- ventilation.

 

Rather than waiting for a long time for a dehumidifier to do it's thing I could invest not much more in something like -

 

.:SALE:. Heat Recovery Unit/Fan Whole House Ventilation System Only 20 left | eBay

 

and some insulation.

 

Air flow is free! As long as I can keep as much of the heat in the system as possible it may not be too expensive to run.

[richy_B]

I have a vent axia heat recovery unit inside a (previously refrigerator) 20ft shipping container. It replaces the entire volume of the container three times an hour and recovers around 80% of the heat (in the 40-45c range). I would suggest something similar. I cannot ever see a dehumidifier being able to cope and just venting will lose so much energy.

[L.M]

On 17/09/2015 at 10:07, openspaceman said:

 

 

I agree all the time the ambient RH is low, the thing is as temperature goes down the air's carrying capacity for water goes down and it's ability to carry enough heat to evaporate water goes down too, heat tends to be cheaper than fan power.

 

A dehumidifier is in an essentially closed system (only water leaves) so heat can be conserved in the system, plus all the electricity used ends up in the system as heat.

 

I still haven't run my domestic dehumidifier on a meter to see exactly how much water it produces per kWh but I'm confident a heat exchanger can keep heat in the system plus make use of any unsaturated potential in ambient air for the same air movement.

150L dehumidifier runs at around 11cents an hour 

[L.M]

On 18/09/2015 at 08:45, richy_B said:

I have a vent axia heat recovery unit inside a (previously refrigerator) 20ft shipping container. It replaces the entire volume of the container three times an hour and recovers around 80% of the heat (in the 40-45c range). I would suggest something similar. I cannot ever see a dehumidifier being able to cope and just venting will lose so much energy.

150L dehumidifier will go through 830m³ an hour of air