3 main types of Moisture:
Condensation – It is probably the most common form of moisture that does affect your home. Effects of condensation include streaming windows and walls, deterioration in decoration such as discolouring of window panes and eventually the growth of black mould.
Rising Moisture – It happens when the water enters a structure through a permeable masonry wall in an upward movement by capillary action. This process occurs when water molecules are electro chemically attracted to mineral surfaces. Effects of Rising Moisture include Decayed skirting boards, crumbling plaster, peeling paint and wallpaper.
- Penetrating Moisture – It happens when the water soaks through into the perimeter wall, floors and ceilings. It can be caused by external construction defects such as defective guttering, cracked rendering and faulty joints between windows and walls. Common effects include Damp patches on the floors, ceilings or walls will appear, damage to decoration and decay to timber and plaster. Mould growth may also occur.
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Our Home Ventilation Range
Positive Pressure Ventilation Systems – Quite common in existing Kiwi homes but these systems are not compliant with the current ventilation standards for the new builds. Essentially the system works by taking air from the attic or roof space and pumping it into the main living areas though ducts or vents. The air is trapped at this point and relies on gaps in the building structure to allow it to move. One more disadvantage of these systems is that they do not have a heat exchanger.
Balanced Pressure Heat Recovery Systems – Newer systems taking in the fresh air and pushing out the old air. These systems come fitted with a heat exchanger that recovers heat energy from the outgoing air and uses it to warm up the incoming air. This system is specifically designed for modern homes with fairly airtight construction and they work best with outlets in multiple rooms so air can flow through the whole house. If you live in a colder part of the country you’ll see better power bill savings than warmer regions.
Extractor Fans & Rangehoods – Huge amounts of moisture is generated in Kitchens and Bathrooms. This is where Rangehoods and Extractor Fans should be placed – as close to the moisture source as possible and must be vented to the outside and not the roof space.
HRV, ERV and HVAC
- HRV stands for ‘heat recovery ventilation’. It provides good climate control economically. However, they are mainly used for the ventilation purpose. No heating is added so it won’t warm your home (beyond what can be recovered by the heat exchanger). These systems are considered one of the best options for the Kiwi homes.
- ERV stands for ‘energy recovery ventilation.’ Effectively it works the same as an HRV system but an ERV transfers both temperature and moisture and uses it’s heat exchanger to pre-warm the cold air coming in. These systems are not ideal for NZ conditions because of low humidity, hence, ideal for highly humid areas.
- HVAC stands for Heating, Ventilation and Air Conditioning. Designing an HVAC system design takes mechanical engineering expertise and a grasp of the principles of thermodynamics, fluid mechanics, and heat transfer, which Fantail Services can do best for your needs. These systems are ideal for offices or large industrial spaces.