Your AC (HVAC) filter is almost always located in one of two places: hidden behind a return air vent grille on your walls or ceilings, or directly inside the air handler/furnace unit itself.
What Cabin Air Filters Trap. Modern cabin air filters are designed to capture a wide range of airborne particles that trigger allergic reactions. These include pollen grains (typically ranging from 10-100 microns in size), dust mite debris, mold spores, and even pet dander that may have hitched a ride on your clothing.
A dirty filter is a breeding ground for bacteria, and too much build-up will cause the filter to break down and let some gunk through. Your AC will then circulate the dirty air through your home, which can lead to a sore throat from air conditioning. That's why most modern window ACs include a “Check Filter” light.
Lennox furnace filters most commonly come in nominal sizes of 16" x 25" x 5" (e.g., X6670, X8309) and 20" x 25" x 5" (e.g., X6673, X8310). Because exact measurements vary, always check your specific cabinet model or measure your old filter using a tape measure.
Your Lennox furnace filter is typically located in the return air duct just before it enters the indoor unit, or directly inside the blower compartment at the base/side of the furnace.
Change your Lennox furnace filter based on its thickness: 1-inch filters need replacing every 1 to 3 months, while thicker 4- to 5-inch media filters (like the Healthy Climate CarbonClean) last 6 to 12 months. Check your filter monthly, and replace it earlier if you have pets, heavy allergies, or run your system constantly.
Warm salt water gargles – Helps reduce swelling and kill bacteria. Honey and warm tea – Soothes irritation and coats the throat. Hydration – Drinking plenty of fluids keeps the throat moist and promotes healing. Humidifiers or steam – Adding moisture to the air eases dryness and irritation.
Air conditioning sickness—often linked to Sick Building Syndrome—occurs when extended exposure to artificially cooled environments, poor ventilation, or unmaintained AC units triggers adverse physical reactions.
A sore throat at home is most commonly caused by dry indoor air, indoor allergies (like dust mites or pet dander), mold, or postnasal drip. It can also be a sign of a spreading viral illness (like a cold) or acid reflux acting up while lying down.
The "Big Eight" foods responsible for approximately 90% of all food-related allergies are milk, eggs, fish, crustacean shellfish, tree nuts, peanuts, wheat, and soybeans. These foods must be declared on food labels according to FAACT's allergen labeling guidelines...
Drinking plenty of water is the most effective natural way to ease allergy symptoms, as it thins mucus and prevents nasal passages from drying out. For targeted relief, try herbal teas like ginger or green tea, which contain natural compounds that block histamine receptors and reduce inflammation.
You lie awake wondering if the gentle hum from your air purifier will keep you up all night. Or maybe you're concerned about running electronics while you sleep. These worries are common. The truth is that sleeping with an air purifier on is not just safe—it's one of the best things you can do for your health.
Most homes have one to three air filters, depending on the size of your house and HVAC setup. You might have:
9 Signs of a Dirty Air Filter
The "best" AC brand depends on your needs, as the industry leaders vary depending on whether you are looking for whole-home central air, a ductless mini-split, or a portable/window unit for a specific room.
"Air conditioning disease" is a broad term that most commonly refers to Legionnaires' disease, a severe type of pneumonia. It is contracted by inhaling water droplets or mist contaminated with Legionella bacteria, which often thrive in the poorly maintained cooling towers of large commercial HVAC and water systems.
Many Amish homes are built with plenty of windows to help circulate the air and bring in the cooler overnight temperatures. They open the windows on the top floors to help the heat escape while the family retreats to the lower grounds within their homes for comfort.
The 3-minute rule is a simple but important guideline: wait at least three minutes after turning your air conditioner off before turning it back on. That short pause gives the refrigerant pressure in the system time to equalize.
For the fastest relief, sip a warm mixture of honey and lemon in water or decaf tea. Honey coats the throat to instantly soothe irritation, while lemon helps thin out mucus. Alternatively, drinking ice water or sucking on ice pops quickly numbs throat pain and reduces inflammation.
Most sore throats are viral and resolve on their own, while bacterial infections like strep require antibiotics. While you cannot know for certain just by looking, distinguishing between the two relies on specific symptoms.
To sleep comfortably with a sore throat, elevate your head with extra pillows to prevent post-nasal drip, run a cool-mist humidifier to keep the air moist, and coat your throat with a teaspoon of honey or a medicated lozenge before bed.
Warning signs include weak vents, higher energy bills, extra dust, odd smells, and loud fan noise. Pet fur, sawdust from home projects, and long hours of use can block the filter much faster. New, properly sized filter keeps the air fresher, trims your power bill, and helps the furnace last longer.
A dirty filter will slow down airflow, making your heating or cooling system work harder to maintain a comfortable temperature. This wastes energy and increases your utility costs.
If you run a disposable filter in your furnace, it needs to be changed every 2 to 3 months, depending on the size and type. Permanent furnace filters, on the other hand, are designed to be cleaned and reused, so it's simply a matter of checking your filter occasionally to make sure it's not too dirty.