Modern combined heating, ventilation, and air conditioning systems (HVAC) have replaceable air filters or screens inside that prevent airborne particles of up to 40 microns from penetrating inside HVAC appliances and potentially causing blockages. In general, HVAC screens generally have a short lifespan. In fact, the US Environmental Protection Agency recommends changing the air filter on an HVAC appliance at least once every three months, or as per the manufacturer’s instructions. Here are three reasons why you should change the air filters on your HVAC system regularly:
Extend Its Lifespan
Dirt buildup and neglect are arguably the primary causes of HVAC system failure. Dirt buildup causes pressure drop inside the air conditioner, which can reduce airflow or lead to complete blowout of the system. A drop in the system’s pressure would put undue stress the internal mechanism, causing it to run inefficiently. When this happens, the system is likely to overheat constantly, forcing its motor to work harder. If left unchecked, this could cause extensive damage to your HVAC system. As such, it is wise to check your air filter’s condition regularly.
Lower Energy Costs
As mentioned, a dirty mesh screen is likely to burden a HVAC system’s internal mechanism and potentially cause it to consume more power. This would translate to higher utility bills, especially during summer and winter when HVAC systems are constantly in use. It is worth noting that, according to a survey by the Department of Energy, homeowners spend about $2,200 on energy bills annually. Therefore, check your air filter’s condition regularly to avoid high heating and cooling bills. In fact, studies have shown that replacing screens on an HVAC system can reduce energy utility bills by up to 15%.
Improved Air Quality
HVAC screens block airborne particulates such as pollen, mold spores, bacteria, and viruses from reaching the internal components of your HVAC system and ultimately spreading in your home. Some of these particles are potentially harmful, especially among kids and people with respiratory conditions. A dirty mesh screen becomes damp when exposed to condensation moisture. If left in place, a damp mesh screen is likely to develop mold particles that can spread throughout your home via the HVAC system. Therefore, change the screens on your HVAC system regularly to improve the quality of air inside your home and consequently keep respiratory diseases at bay.
In summary, home HVAC systems generally contain a mesh for trapping airborne particles. However, dirt particles and moisture often leads to a clogged air filter. According to the manufacturers of air conditioning systems, it is wise to replace the filters on an air conditioning system regularly. Using clean air filters on your HVAC system always is likely to lower your heating bill, improve the quality of air in your home, and extend the lifespan of your HVAC system. Finally, there are different types of filters available on the market today. However, you should always buy replacement air filters with a Minimum Efficiency Rating Value (MERV) of between eight and 13. A high rating value indicates the ability to prevent more contaminants from entering your air conditioner.
*Sources:
http://www.energystar.gov/
http://www.thisoldhouse.com/
