There are several environmental effects such as temperature, wind and noise that act on any building structure. These play a key role in the comfort of people staying in these buildings. The main and primary objective of each facility is to provide a very comfortable and highly productive vacant place to the residents and occupants. Air temperature plays a big role in people's comfort level, which has a major direct effect on people's productivity. In today's economy of high unit and hard costs, it is also very important to optimize and regulate energy efficiency. and also reduce utility and unit costs such that organizations can perform the function within their predetermined allocated budgets. When people become dissatisfied with the thermal environment, it not only poses a potential and serious health risk, but it also impacts people's ability to work effectively and their comfort at work. The BS EN ISO 7730 environmental code has a definition of thermal and environmental comfort as the state of mind that expresses people's satisfaction with the thermo-environmental environment, i.e. the condition environment in which people feel neither much heat nor much cold. The human thermal environment It is not that simple and it cannot be expressed numerically. This cannot be well defined by acceptable ambient temperature ranges. It is a very personal experience which depends largely on a large number of criteria and which can be very different from one person to another in the same place. It can be suggested that an environment can be expected to achieve very reasonable comfort at the time when at least 80-90% of occupancy...... middle of paper ...... m which introduces air cool in the room. rooms in the house.Balanced Systems: Balanced ventilation systems, if designed and installed properly, neither pressurize nor depressurize a home. They allow almost equal amounts of fresh outside air and polluted indoor air to enter and exhaust. A balanced ventilation system always works within any home's HVAC ventilation system to ensure proper distribution of fresh air. A fresh air supply as well as ventilation systems and exhaust vents can be installed in each room. Advantages: 1) Reduces pollution 2) Makes the environment clean 3) Reduces indoor air pollutants. 4) Reduce germs and pollutants 5) Make indoor temperature normal and humid.6) Make fresh air entry. Disadvantages:1) The power system only consumes energy.2) It produces noise.Typical ventilation system