AC Repair Garland | Air Filtration
There are many things to consider when selecting an air filtration system. Things such as types of filter, air flow rate, the number of hourly changes, CADR (Clean Air Delivery Rate) ratings, and so much more.
Clean Air Delivery rate indicates an air cleaner’s capacity to filter out airborne pollutants such as pollen, smoke, and dust. Each of these three pollutants carries a separate rating. The CADR rating is given in direct correlation to the type and size of filter used in an air filtration device.
- Performance, Air Flow, and Air Changes per Hour
The speed of the fan is what determines the air flow as well as the type of filter utilized in the unit. The size of the room can also dictate the number of changes per hour.Air flow rate will give you the amount of air that passes through the air filtration system over a given period of time. Since air is a gas it can be measured in two distinctly different ways; by its mass, or by its volume.
Air flow is abbreviated to CFM (Cubic Feet per Minute). It is essentially dependent on two separate factors, the power of the fan in your heating/cooling unit, and the efficiency of the filter in the air filtration unit.
- HEPA Filtration | How Does It Work?
HEPA Filters are perhaps the most common choice and rightly so as it is also one of the most effective. They have been known to eliminate up to 99.9% of all airborne contaminants.Glass fibers are required in the production of HEPA filters. Due to the unique configuration in which the glass fibers are arranged, the air is allowed to pass through while larger contaminants such as allergens, dust, and mold are trapped by the smaller fiber openings. Adhesion of the glass particles also aid in the trapping of the larger allergens, etc.;
In other cases, the contaminants being trapped due so due to partial contact with the glass fibers, or by simply being pressed against the filter by strong air flow permitted by the glass fibers inside the air filtration unit. Airborne particles are also sometimes attracted by particles already trapped within the filter. Thanks in great part to the several ways HEPA filters trap particles, a HEPA filter can collect as much as 99.9% of all airborne impurities. Providing the particles are larger than 0,3 microns in diameter.
Because most airborne contaminants fall into these three categories, the impact on the quality of the air you and your family breathe is not difficult to discern. A HEPA air filtration system is especially useful for people who suffer from asthma or allergies such as hay fever. With a HEPA filter in place, virtually all dust, allergens, pollen, dust mites, pet dander, mildew and its spores can be virtually eliminated.