Indoor Air Quality
Cause of naming is: The quality of the air in any building or Place is called Indoor Air quality, it includes: temperature, humidity, comfortable atmosphere and the amount of air, amount of pollution compounds like Carbon dioxide. These days, people care so much about Indoor Air quality as houses. That means houses doesn’t use a lot of energy and the leaking of the air through the building doesn’t provide the right ventilation to avoid pollutions.
The key factors for the indoor air quality are Humidity and temperature. Any home temperature is determined by its heating system and water vapor. Water vapor is produced due to daily activities like cooking, breathing, houseplants and showering. The desired humidity in any house is between 30-40 percent as it keeps our skin from drying. A higher percentage of humidity more than 40% will increase the growth of mildew, mold and rot. Above 60% humidity increases the growth of viruses, bacteria and fungi.
There are a lot of ways were pollutants can get into the house, like carbon dioxide which is producing while breathing , Carbon monoxide which is a very dangerous gas produced by heating appliances and cars , all houses should have an alarm for the carbon monoxide to be kept near bedrooms. Formaldehyde causes long term problem for people’s health which are produced from furnishings as cabinets and carpets. Radon, is produced from soils underneath the house, also cooking, smoking and other chemicals can cause a lot of health problems. Being exposed to pollutants may cause health problems such as respiratory diseases, cancer and eye irritation. So it’s very important to regulate and keep an eye on pollution rate inside the house.
How is Indoor Air Quality Improved in Homes?
Ventilation is one of the main and important ways to manager Indoor air quality, types of ventilation are: Local and whole house ventilation
Local ventilation: It is mainly used in kitchen-sand bathrooms where high pollution areas exist, it’s used to eliminate the humidity and pollutantsbefore they move to any other places in the house. We can perform that using bathroom fans or hoods …etc. these tools can be controlled and processed by using timers to withdraw the excess pollutants and humidity.
Whole Ventilation: It was used before as houses rely on natural air leaking as houses where wide not as tight as what we see now. Without using neither natural pressure gradients nor no mechanical ventilation system as humidity and air temperature differences move through open windows or doors or building envelops.
We can use 2 mechanical ventilation in which we can use 2 bathroom fans designed to work continuously and together in order to bring fresh air, supply-only systems are not widely used in US because they force the moisture inside houses into the building envelope.
The best whole home ventilation is the heat recovery ventilation (HRV) and also named (ERV) energy recovery ventilaton. These kind of systems provide fresh and clean air in an equal rate and distributes it throughout the environment like houses.