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Originally Posted On: https://www.beehiveheatingandair.com/does-my-hvac-have-two-air-filters/
Do you know how many HVAC filters your home has? Most people assume just one, but now you’re probably asking yourself, “Does my HVAC have two air filters?” If so, we have the answer for you!
The role of an HVAC filter
Every HVAC system has at least one air filter. These can be made of various types of materials, though they serve the same purpose.
The role of an HVAC filter is to remove pathogens from the air. This includes pollen, dirt, dust, and even some microbes. HVAC filters most commonly will sit between the return air duct and your blower motor. This also helps to prevent those same contaminants from causing problems within your furnace’s electrical operation.
How often should you replace an HVAC filter?
A dirty filter will cause your blower motor to work harder to pull air into the system. A clean filter, on the other hand, will improve your system’s efficiency.
To that end, we recommend that you replace (or clean) HVAC filters at least every six months, perhaps before the start of winter and summer. A good rule of thumb is that you should replace your air filters and smoke detector batteries together.
An even better process would be to replace your filters quarterly. This will help to ensure that your filters do their job most efficiently at the start of each season.
Types of HVAC filters
Not all HVAC filters are made alike. There are a few different types of HVAC filters, with the most common being pleated disposable filters. They are made of fiberglass which is cheaper but have a lower MERV filtration rating.
Some HVAC systems have what’s called a hydrostatic air filter. This cleans the air up to MERV15 and ionizes the air and the particles within it. Then, an oppositely charged plate “holds” on to those contaminants so that they don’t pass through your system and into your home.
Finally, there are highly-rated disposable HEPA filters, also made of fiberglass. When disposing of these, you should use a mask and gloves to prevent yourself from breaking or touching any of the contaminants.
Can an HVAC system have two filters?
Yes, an HVAC system can have two filters. These are relatively uncommon unless you have any of the following situations:
• Multiple return air ducts, in which case a filter can sometimes be fitted to sit in the entrance to the vent;
• You have both a return air duct (or ducts) as well as a separate air handler, or;
• In the case of electrostatic filters, some homes may use a disposable filter in addition to the charged filter setup.
Replacing your HVAC filters consistently
Of course, our team will gladly replace your HVAC filters during our annual inspection of your system. As many homeowners call us out for an appointment at the start of the cold and hot seasons, we can ensure your HVAC system works as efficiently as possible by replacing your filters then too.
Would you like to schedule your next inspection visit? Then click here to send us a message or give us a call at (801) 980-0903 to book it today!
