Why Does My Central Air Have Two Filters
All about central air systems and why your central air has two filtersLet’s say you just moved into a new house 3 months ago and it’s time to change the air filter. You go looking for the usual locations for air filters and to your surprise you find filters in many locations! Read: why does my central air have two filters No worries! Most central air cooling and heating systems have 2 air intakes that circulate indoor air and filter out dirt by running it through an air filter. Depending on the size of your home, you may have more or less air intakes, but for most homes a central air system is provided by 2 intakes with air filter covers. . in your home’s HVAC system.
Your home’s central air system
Contents
If you have a central furnace and/or AC system in your home (as opposed to a ductless system), your system probably includes the following 3 air circulation components:
Air handling
This is the metal box that houses the fan, fan motor, condenser coil, and compressor – many of the critical components of your air system that allow warm air to enter and cool it before it circulates through the home. They are usually located outside your home along an exterior wall.
Heating/Cooling System
This is an internal system that cools or heats air by passing it through a set of hot or cold coils, varying the temperature to the desired range set by your thermostat. This central air component also typically contains the blower, evaporator coils, and furnace.
Air duct system
Your home’s AC duct system does two things:
- Air from outside the home is drawn into the unit, cooled or heated to the appropriate temperature, and then brought into the home.
- Air from the home is pulled back through the return ducts, cooled or heated to the appropriate temperature, and then returned through the home duct system. This helps air circulate throughout the house and keeps your temperature stable
Read more: why does my car vibrate when braking | Top Q&A Understanding the parts of your central air system is important because it helps explain situations where multiple air filters are used in different places.
When you need two air filters
There are many cases where multiple air filters are needed.
Scenario 1: Your HVAC system has multiple return ducts.
This is the most common reason why your central air system has two air filters. If you live in a large enough house, apartment or condo, you’ll have plenty of return air ducts to efficiently circulate air throughout the house – after all, no one likes stuffy rooms and heat. unevenness. but it also requires an air filter at each vent to properly filter the air and prevent dust particles from entering your fan motor.
Scenario 2: You have 2 air filters because your system has one return air duct and one “air handler”.
This setting exists for a few reasons. Filter life varies, so the number of times you need to change the air filter in the return air duct versus the air handler will vary because they are different sizes. For example, the most common filter size for vents is one inch deep and is designed to accommodate a one inch air filter. Conversely, if you look at our filters specifically designed for air handlers, they have an air filter depth of 4 or 5 inches. Because air-handling filters have more filter material due to their size, they can collect and hold more dust, pollen, and smoke before they need to be changed.
Scenario 3: You have multiple central air systems and each requires separate filters.
This is especially common in two-story homes, where it is easier to regulate the temperature between floors. This means you have more than one air handling filter and you will likely have multiple vents – at least one vent per duct system per HVAC system.
How to find the vents of your air filter
Now that you know why you have 2 air filters in your HVAC system, let’s locate them. These vents can come in a variety of sizes, but they are generally larger than the vents that let the air into the house (usually about the same size as a sheet of paper).
For more information on how to find your air filter, read our article on different air filtration systems.
Change your air filter
Read more: Why Do Ears Hurt After Running or Working Out? | Q&A back to top Now that you know where to look to find all your air filter replacements, you’re well on your way to breathing cleaner, better air in your home. If you find yourself needing multiple air filters, you don’t need to buy multiple air filters. store – simply find your central air system brand and size on our website to buy the type and quantity you need. If this is your first time installing an air filter, be sure to read these resources to purchase the right product and get it working properly:
- How to measure your air filter
- How to change your furnace filter
Frequently asked questions about the air filter intake hole
Do I need a filter in my Vents Return?
Yes, you need a properly sized air filter in your vent. This not only helps clean the air circulating throughout the house, but also helps your central indoor unit operate efficiently.
How many air filters does a house have?
Typically, a house will have 2 air filters in their air intakes. In some cases, there may be more or less depending on the square footage of the house or apartment and the number of floors that need to be supported by the central air system.
Should you layer a 1-inch air filter?
In some cases, the processor air inlet or vent has a filter depth greater than one inch. Because 1-inch air filters are the most common, some homeowners may think it’s okay to layer a 1-inch air filter to fit a 2-, 3-, or 4-inch air filter slot. You should not do this. You should take this advice from a Houzz forum discussion – if you see a return duct that can hold a 2-inch or 4-inch air filter, but there are many other stacked 1-inch filters to matches the position, remove this setting immediately. It matters if it acts like a 2-inch air filter or a 4-inch filter in terms of efficiency when working with your central air system. In addition, buying an air filter this way will be more expensive. For example, a 16x25x1 air filter from Filterbuy costs $22.66* if you buy two – conversely, buying a 16x25x2 air filter costs $17.58* – a better deal much. * Current prices as of 2021 – prices may have changed since publication of this price
How do I clean the AC vent?
By regularly replacing the intake air filters, your vents will stay relatively clean. In case dust accumulates, you can easily remove it with a vacuum cleaner, duster or broom. In the event that there is a significant amount of dust and debris on your air vents, the vents can be removed and cleaned with a hose or pressure washer.
How do I keep dust out of the AC vent cover?
The best way to prevent dust from accumulating on the AC vent cover is to change the air filter regularly. By replacing your air filters at recommended intervals (usually 90 days), dust won’t have a chance to build up to the point of covering your AC intakes. If there is dust on the AC outlet, you can simply remove it with a vacuum cleaner, duster, or broom.
What is the difference between my Home’s AC Entrance and Ventilation?
Technically, both of these parts can be called “vents” because they are both the places where air circulates in your home. The main difference is that your vents “draw” air from the room and your vents “push” conditioned air into the room. You can usually tell the difference with the naked eye because the air inlets are larger in size and less numerous than the duct vents, which are commonly found in every room of your house.
Replace your air filter today
Shop the different MERV rated air filters below and make sure your central air system is running smoothly. You can choose the right air filter size for your family at one of the links below. Read more: Why is it called blow job
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