Every home needs a ventilation system for energy efficiency. If there is no proper ventilation, an airtight home will not be able to remove impure indoor air. With ventilation there is also moisture control. So there needs to be an exchange of indoor with outdoor air so that smells and stale air can go out, letting in fresh air. In badly ventilated homes, imbalanced moisture levels can cause mold and mildew, damaging your home as well as your health.

The cheapest way to ventilate your home is by opening all the windows to let in fresh air. But that is just not possible during extremely warm or cold weather when you have the home heating and cooling systems running, necessitating an airtight home. General ventilation fans all over the home can dilute the stale air around the home.

One of the most important parts of the house that needs compulsory ventilation is the attic. We tend to store a lot of stuff there. A properly ventilated attic, by virtue of its location can keep your home cool in summer, preventing the build up of moisture and hot air in winter. Why attic ventilation? Simply because during summer a lot of heat can get trapped there, making your cooling bills go through the roof. Any moisture build up within the house usually rises to the attic and if it does not go out of here, it condenses and damages the insulation and building structure. Attic ventilation therefore keeps the temperature and humidity in control. Proper attic and roof ventilation can increase the life of your roof. All attic ventilation fans can be controlled with ventilation differential thermostats.

It is necessary to have proper garage ventilation where various dangerous exhaust gases are emitted from vehicles. Large garages and workshops must have industrial ventilation fans while small garages can be ventilated through a duct system. In industrial ventilation, the industrial ventilation fans control the workspace atmosphere by minimizing the exposure of employees to contaminants.

Heat recovery ventilation systems are used in homes. These use separate blowers for incoming fresh and outgoing stale air. The heat exchange core heats the fresh air and the damper stops the cold air from defrosting.

Sufficient basement ventilation can make your home more comfortable and keep you healthy. Basements must have plenty of windows for clean air. In fact, you can install bathroom ventilation fans in the basement bathroom and vent it to the outside so that fresh air comes in through the windows and provides bathroom ventilation as well. Axial fans for ventilation are often used to balance the air.