Condensation on a window

Condensation can cause problems in the home

What is condensation?

Condensation is the result of water vapour cooling inside a house causing droplets of water to form on cool surfaces e.g. windows.

What makes your home damp?

Ways of reducing condensation

  1. Reduce the production of water vapour e.g. window open in bathroom and door shut, extraction in bathroom and kitchen.
  2. Keep rooms ventilated, especially the damp ones.
  3. Keep the home warm during winter, at least 7°C warmer than outside.
  4. Insulate ceilings, walls and floors
  5. Use cupboard heaters in problem wardrobes
  6. Use properly dried timber during construction e.g. kiln dried 
  7. Dry out the air using a dehumidifier

Using Dehumidifiers

Dehumidifiers remove the moisture from the air and this results in a 2° rise in air temperature.

Points To Consider When Buying a Dehumidifier

Suggested Ways of Using a Dehumidifier

Running Cost
Based on an average 24 hour tariff of 32 cents per kWh
How many amps is the unit?
Amps x Volts = Watts
e.g. 2.6A x 230V = 598W
Watts x cost of 1 unit = Running Cost
.598 x 32 cents = 19 cents hour max
NOTE: If a dehumidifier has a heater this will increase the running cost.
e.g. 1600W fan heater = 51 cents an hour
  + 19 cents dehumidifier
  = 70 cents an hour


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