Ventilation of Buildings

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Ventilation will not solve that problem. Outdoor air can also bring pollution indoors as well, so taking steps to reduce outdoor air pollution is important, too. Environmental Protection Agency. Select your location to view local American Lung Association information near you Enter your zipcode.

6 Ways to Ventilate Your Home (and Which is Best)

Ventilation: How Buildings Breathe Proper ventilation keeps the air fresh and healthy indoors. How Fresh Air Comes into Your Home Air comes into buildings and leaves by three different ways: Doors and windows, whenever they are opened. Joints, cracks and openings where parts of the building connect, including floors and walls and around windows and pipes.

Spot ventilation, including fans that pull air from the bathroom. Mechanical, whole house systems, to systems in larger buildings that force air into and out of the building. When not enough air circulates, pollution builds up indoors. Sometimes efforts to make buildings more energy efficient can backfire by not allowing enough air to move, building up pollution. Carbon monoxide can build up to deadly levels indoors without proper ventilation, but it is not the only risk. Concentrations of radon, which can cause lung cancer, can increase in homes with low ventilation.

High humidity outside can make indoor air more humid, increasing the risk of moisture damage indoors, such as mold growth or wood rot.


How to Use Ventilation to Protect Health Use exhaust fans in bathrooms to remove moisture and gases from the house. Fit your kitchen with an exhaust fan that moves the air to the outside. Use the fan or open a window when cooking to remove fumes and airborne particles. Make sure gas, propane, wood or other combustion appliances vent completely to the outside.

How it Works | Breathing Buildings

Do not use ventless stoves. Install a carbon monoxide detector in multiple locations in your house. Vent clothes dryers to the outdoors, too. Clean out the vent regularly to make sure the dust does not block air flow. If you paint or use hobby supplies or chemicals in your home, add extra ventilation.

Open the windows and use a portable window fan to pull the air out of the room.

Natural Ventilation

Test your home for radon , and if you have elevated levels, hire a professional to add ventilation to remove it. Radon is the second leading cause of lung cancer. A room with excess moisture and limited heating may take longer for the airing-out to work. This was mainly due to moisture stored in linings or furnishings. Moisture levels could then be maintained by simply opening windows in the mornings.

In warmer, more humid regions, passive ventilation for cooling should be included in house design. Design of passive ventilation explains how to calculate air flow rates. Air speeds up to 1.

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Air speeds above 1. Passive ventilation for cooling in the summer must be countered by restricted incoming air in winter, so that minimum fresh air requirements can be maintained without causing draughts or excessive heat loss. Passive ventilation alone will not provide enough air exchange to remove moisture from wet areas such as bathrooms, kitchens and laundries. In those situations, an air extraction system or other form of active ventilation is needed to remove moisture.

Mechanical extract fans including associated ducting must have a flow rate not less than:. Other forms of mechanical ventilation are also available and may be useful if a building is very airtight, or security or other concerns make a passive solution unviable. Heat recovery systems in particular require very airtight buildings and user education to work efficiently. For more detail, see active ventilation. Passive ventilation must meet the requirements of Building Code clause G4 Ventilation. This includes ensuring that spaces within buildings have adequate ventilation for their intended use and occupancy, having adequate fresh air, and have means to remove moisture, products of combustion and other airborne contaminants.

Recent New Zealand research has found that even in new homes that meet Building Code requirements, draughts can reduce temperatures to uncomfortable levels. The Wellington City Council built an apartment complex, finished in , where the 27 one-bedroom apartments were double-glazed and insulated.

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Yet the tenants said the units were cold in winter. It found draughts were to blame. It also found that fixing sealing strips to doors helped to eliminate draughts and make the apartments an average of 1. The Government introduced ventilation and anti-draught requirements for rental housing in the healthy homes standards announced in February There will have to be openable windows in the living room, dining room, kitchen and bedrooms.

Rental property owners will also have to stop any unnecessary gaps or holes in walls, ceilings, windows, floors and doors that cause noticeable draughts. All unused chimneys and fireplaces will have to be blocked.

Ventilation Basics Series #2 - System Types

The healthy homes standards will apply to new tenancies from 1 July and to all rental homes from 1 July Design of passive ventilation. Passive ventilation fixtures. Back to top.