New Homes and Ventilation

Do Home Ventilation Systems work?
Look at this Survey Done 2010

New Homes and Ventilation

Lets look at new homes in regards to ventilation, it is recommended that all new homes need a minimum of 0.5 air changes per hour. Therefore every 2 hours the air is changed once. This will theoretically keep a home ‘ventilated’ but not necessarily dry and healthy.

By opening windows to ‘ventilate’ your home you will give your home fresh, and more often than not, you will be giving your home damp, cold air in the winter with hot, humid (also damp) air through the summer, and year round problem with dust and pollens.

The EECA report ‘home ventilation report’ points out on page 3 that many new homes are getting only 0.2 of an air change per hour, that is less than half the recommended level, remember at that level it is not even enough to ‘ventilate’ your new home, let alone keep your home dry and healthy. These homes will never dry out they will become like all existing homes that get damper and colder as the years pass.

A new home has many liquids and chemicals entering the home atmosphere while it is being built. The water from the concrete pad can take 1 to 2 years to completely dry out even though the concrete is generally ‘hard’ within 1 month. Then there are all the chemicals, moisture and preservatives evaporating from your new walls, plaster, paint and wallpaper paste. Some of these are still moving through the product into your new home’s atmosphere for 6 to 12 months after you have moved in.

Effectively your new home does not get a chance to completely dry out before you move in, and then you and your family manufacture and introduce more moisture from day one, for your home to absorb and generally open windows to ‘ventilate’ your new home.
All new homes need a planned home ventilation process that brings in controlled fresh and healthy air that is not damp and/or cold or holding dust or pollens, all year round. The best system is one that varies and changes in line with what the owners want and what is happening in both the roof cavity and the actual home itself. A system that is capable of reducing the air volume to half an air change per hour to cover the minimum ‘ventilation’ requirements and when the best conditions exist increase the volumes to air up to 3 air changes an hour to remove odours and pass as much warm air through your home to increase the house temp and make it far more comfortable.

Think of this:

If you were to pay for your household air to be manufactured or modified to what you need, that is – be cleaned – made drier – cooler – warmer – filtered – fresher – to add oxygen – then to remove carbon dioxide and other un-healthy gasses, would require large quantities of some form of energy on an ongoing basis, to heat or cool our homes, to dry and keep our homes mould free, to treat the internal air and or to remove contaminants, condensation and or odours. This would be expensive and or very time consuming.

The interesting thing is that most of you already have available the ideal process that takes care of all of the above, it is available and cheap – but you do not use it – it is natural and only needs a controlled system installed to take advantage of it.

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The Need for Ventilation to maintain indoor air quality

The New Zealand Home Ventilation Situation

Moisture control, airflows and ventilation