A dirty HVAC filter can hinder the performance of your air conditioner. As most know, all homeowners should replace their dirty HVAC system filters on a regular schedule. However, if you notice when it is time for your scheduled replacement that the filter is completely covered with hair, dust, and other particles, you may wonder why it gets so dirty before the scheduled replacement and what can be done to solve the problem.
Filters in your HVAC System are there for two purposes:
- they collect dirt and debris and prevent them from entering and harming the system
- they help eliminate harmful substances like dirt and dust from the air
Without these filters, the particles will find their way through the components of your air conditioner and be blown back into your homes through the duct system. Additionally, dirt and debris can cause harm to your HVAC system and even shorten its lifespan.
If you are experiencing an unusual accumulation of dirt on your HVAC filter, the experts at Galmiche & Sons can handle it. Contact us in St. Louis at 314-993-1110. We specialize in serving the heating and air conditioning needs of St. Louis businesses and homeowners and can get your dirty HVAC filter troubles sorted out.
Reasons for a Dirty HVAC Filter
Every filter has a MERV (Minimum Efficiency Reporting Value) Rating. This refers to the size of air contaminants a filter can catch. The higher the MERV Rating of an air filter, the more frequently it will need replacement. So, always consider the filter’s rating whenever you replace the dirty HVAC filter. In general, most residential HVAC filters should be replaced once a month during summer and once every two months during winter. However, it is always best to check the manufacturers recommendations for your particular system or check with a local HVAC professional for the optimal replacement schedule.
If replacement is necessary before this, it may signal certain issues.
Thermostat fan is set to ‘ON’
The AC fan has two options – ‘Auto’ and ‘ON’. If the fan is set to ON, it runs 24/7. As the air in your home circulates continuously through the HVAC filter and system, dirt and other contaminants are continuously attached to the filter at a fast rate. The AUTO setting uses less energy as the fan runs only when the system is actively heating or cooling your home.
What to do: It is typically recommended to use the AUTO setting, as it is more energy efficient and prevents extra wear on your system. However, if your home needs more filtration or you prefer the feeling of continuously moving air, use the ON setting, but keep in mind this will usually mean you need to replace the filter more frequently.
Leaky Air Ducts
Dust and dirt can be introduced into your home by leaks in the air ducts from areas like the attic or basement. The amount of dirt brought into your home determines the amount of dirt the filter accumulates.
What to do: Contact a professional to inspect your ductwork. The duct system should be repaired or replaced to ensure leak-free ducts. This will also prevent you from having a dirty HVAC filter, which may lead to frequent replacement.
Pet Hair
Pets shed hair and this may float in the air or stick to your upholstery and carpets. When this hair is sucked into the HVAC ducts, it contributes to your fuzzy filter. As a result, dust and dirt may accumulate faster on the dirty HVAC filter because of the pet hair.
What to do: Vacuuming your home daily and brushing your pets weekly can go a long way to reduce this problem.
Dusty Home
An unusually dusty home may contribute to your dirty HVAC filter. This may come from accumulated dust in rooms not frequently used or from a recent home construction project.
What to do: Always ensure the regular cleaning and vacuuming of your home to avoid dust and dirt in the HVAC filter. Also, make sure to close off vents and rooms during major construction and renovation projects.
Your Filter MERV Rating
Filters with high MERV rating are capable of trapping smaller particles and may accumulate excessive dirt and dust faster. This can cause clogging and excessive dirt on the HVAC filter, which restricts system airflow. Filters with low MERV ratings provide a good balance between system airflow and filtration efficiency.
What to do: Thicker filters may not be better – although they will give cleaner, fresher air to your home, it accelerates wear on the HVAC fan and lowers the energy efficiency of your system. Contact a HVAC expert that can help you weigh your options and choose the best filter for your system.
Contact Galmiche & Sons for Help with Your Dirty HVAC Filter
Do you have concerns about your dirty HVAC filter? Our professionals can help you to either replace or fix it, while also finding the cause of your dirty HVAC filter. In the greater St. Louis area, contact us for help with any of your heating & air conditioning questions today!
