Your HVAC System and Allergens - AC&R Services (2024)

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  • By: acrsvc_admin
  • Posted: 2024/05/03

Do you notice yours or any family member’s asthma and allergy symptoms erupting with the changing seasons? You’re certainly not alone. As many as 60 million people in the U.S. have allergic rhinitis, more frequently known as hay fever, an ailment that triggers nasty symptoms after inhaling pollen.

Remaining inside and keeping windows closed to escape high pollen counts is one approach, but what about indoor allergies? After all, trees, grasses, weeds and flowering plants cause loads of people to sneeze, but allergens such as dust and pet dander can also be fashioned indoors.

By going along with certain tips mentioned below, your heating, ventilation and air conditioning (HVAC) equipment can help enhance indoor air quality and keep allergy symptoms trapped.

Identifying the role of your HVAC unit in allergen reduction

Before we dive into how you can best help alleviate indoor air impurities, it’s essential to become familiar with the role your HVAC system plays in maintaining indoor air quality. Of course, your system’s principal function is to circulate air throughout your home, adjusting temperature and humidity levels. As a bonus, however, it also filters out airborne particles that may well produce discomfort or even harm to those in your home.

When working appropriately and maintained regularly, your HVAC system is designed to filter out pollutants including dust, pollen and pet dander. This course of action traps these allergens in the system’s air filter rather than recirculating them into your home. In contrast, an inadequately maintained HVAC unit can aggravate allergies by spreading allergens all through your home.

Here’s what the technicians at AC&R Services recommend in helping to allergy-proof your home.

Change your filter regularly

The dirtier your air filter, the more taxing it is to remove pollutants (dust mites, mold, pet dander, dead skin, allergens, viruses and more) from your home’s indoor air. It also causes your HVAC system to work much harder than intended since a dirty filter impedes airflow. It’s best to clean or replace your air filter every 30-90 days, depending on the style (see below) of air filter you use and how much your system runs.

Most HVAC units are installed with a basic filter rated 1 to 4 on the Minimum Efficiency Reporting Value (MERV) scale, which ranges from 1 to 20. You should consider updating to a MERV 6 to 13 filter with a tighter weave, thus able to trap considerably more airborne particles without blocking airflow. Again, once you install a quality air filter, replace it every 30 to 90 days, or as the manufacturer endorses, to prevent it from becoming clogged.

Think about investing in HEPA filters for enhanced allergen reduction

High-Efficiency particulate Air (HEPA) filters are recognized for their exceptional performance in trapping tiny particles, including allergens. These filters feature a higher filtration rate than typical filters and can successfully capture airborne nuisances that trigger allergies.

True, HEPA filters cost more, but they can significantly improve indoor air quality and deliver relief for those in your household with allergies. It’s important to routinely replace these filters as the manufacturer recommends, to maintain their efficiency.

The importance of clean air ducts

Another facet of HVAC maintenance that frequently gets ignored is cleaning the air ducts. Over time, dust, mold spores and other allergens can gather in the ductwork, reducing your system’s efficiency and potentially worsening allergies.

Simply run a microfiber cloth over the vents to catch any hidden dust or debris. The less dust that can be pulled into your HVAC system, the better.

It’s also recommended to have your air ducts professionally cleaned every three to five years to keep them free of allergen buildup. This is particularly true if someone in your household suffers from severe allergies or ailments such as asthma.

Consider a UV germicidal light

Certain wavelengths on the ultraviolet spectrum have germ-killing assets, making UV lights a useful add-on to your HVAC system. As airborne bacteria, viruses, mold spores and other such microorganisms pass by, the UV light leaves them unable to reproduce, halting the spread of germs throughout your home.

Keep humidity levels in check

Relative humidity levels around 40 percent are the most effective. Most persons are aware that humid air can lead to the growth of mold and mildew, which can create spores that aggravate allergy and asthma conditions. However, many don’t understand that dry air is also harmful. When there is too little moisture in the air, allergens and pollutants can stay airborne longer, producing asthma and allergy flare-ups and boosting the spread of particles throughout your home. Depending on your own unique situation, you might look to adding a whole house humidifier and/or dehumidifier to your HVAC system.

How do I clean my outdoor unit?

Start by clearing out any branches and leaves from your outdoor unit and clipping neighboring foliage to keep them clear of the fins. Then remove the top condenser and use a hose to spray dirt out the way it came in – through the sides. Sometimes the fins are too close together which can cause dirt to move a bit further inside the unit.

You should plan to clean the fins annually, around the start of summer when your AC is about to be turned back on.

Schedule regular HVAC maintenance visits

Annual maintenance is critical for every homeowner, but for those with allergy sufferers in the household, it’s particularly important. You want to make certain your system is working as it should be and as efficiently as possible. As noted above, it will also be crucial to help ensure that it’s free of mildew, mold, dust and other contaminants that can affect your indoor air quality.

The professionals at AC&R Services recommend having your HVAC system professionally serviced twice a year (in the spring before using the air conditioner and in the fall prior to using the furnace.) Preventive maintenance is important for the life of your HVAC system, addressing any issues before they turn into costly repairs or replacements.

If you have any questions or want to schedule a maintenance appointment, please call us at 570-788-2427.

Your HVAC System and Allergens - AC&R Services (2024)

FAQs

Can HVAC systems cause allergies? ›

Mold and Mildew

These substances grow in dark, damp places like HVAC ducts and inside your air conditioner. When you turn the unit on, mold spores will mix with the air and flow freely throughout your house, triggering your allergies.

Does cleaning HVAC help allergies? ›

While the direct impact of air duct cleaning on allergies remains a topic of discussion, it can contribute to improved indoor air quality and reduced allergen accumulation in your HVAC system. By removing dust, debris, and allergens from your air ducts, you create a cleaner environment for yourself and your family.

What is the number one problem with HVAC systems? ›

Problem 1: Dirty Filters

One of the most common HVAC problems that people face is the presence of dirty filters. Filters are extremely important in keeping the circulating air clean.

How to clean AC for allergies? ›

Replace Air Filters

The most basic air conditioner maintenance a homeowner can perform is replacing old air filters. HVAC technicians suggest that you change your air filters at least every 90 days. Air filters keep dust and debris from reaching the ducts and the unit itself, protecting your AC system from damage.

How do you know if your air conditioning is causing allergies? ›

As with any allergic reaction, it can be difficult to identify the source of your symptoms. With that in mind, you might be experiencing allergy-like symptoms as a result of your AC if you have the following indications. Dry itchy skin and/or nosebleeds along with sneezing, wheezing, or congestion.

Can your HVAC system make you sick? ›

But when mold grows undetected inside your home's ductwork, your HVAC system can spread spores throughout your home, causing a variety of problems for everyone who lives there, including: Chronic Cough. Sneezing. Headaches.

How many years should a HVAC system last? ›

In general, most HVAC systems will last 15 to 25 years, but depending on the type of system and other contributing factors, that estimate can be highly variable.

How do you know if your HVAC system is bad? ›

10 Signs It's Time To Replace Your HVAC System
  1. HVAC Unit Is 10+ Years Old.
  2. Blowing Warm Air Or Not Blowing Cool Air.
  3. Poor Or Weak Air Flow.
  4. Loud Or Unusual Noises.
  5. Humidity In The Home.
  6. Foul Odors.
  7. Leaks.
  8. Frequent Or Short Cycling.

What is the most overlooked part of an HVAC system? ›

Did you know that the air filters in your air handling unit are not only the most overlooked components in your HVAC system but also the most important? Air filters are more than just cardboard boxes filled with fibers or pleated material. In fact, air filters affect many components of HVAC performance and comfort.

Do air purifiers get rid of allergies? ›

Air purifiers can improve air quality and circulate clean air. By trapping mould spores and odours, and removing particles including airborne irritants, they can be effective at removing the source of allergens. It's worth noting that the benefits will be affected by the air purifier's specifications and filter type.

How often should you change your AC filter for allergies? ›

For those with a basic pleated filter and mild allergies, the standard recommendation is 45 days. However, if your allergies are severe or if you use a high MERV rating filter, you might need to change your filter more often.

Can mold in AC cause allergies? ›

Dirty filters and inadequate A/C maintenance can increase your exposure to pollen, mold, dust and other allergens—the air conditioning itself is not the culprit. By properly cleaning and maintaining your A/C unit, your allergies should be spared an unpleasant reaction when the A/C turns on.

What are the symptoms of air conditioning sickness? ›

If you work in an air-conditioned building with poor ventilation, it can raise your risk of “sick building syndrome.” Symptoms include headaches, dry cough, dizziness and nausea, trouble concentrating, fatigue, and sensitivity to odors.

Can HVAC cause sinus problems? ›

For instance, dry air, dust, and allergens can trigger coughing or shortness of breath if you've got asthma. People with chronic obstructive pulmonary disease, or other lung conditions, may be affected by the air coming out of their HVAC system. Central heating can also irritate the nose, making sinus infections worse.

Can central heating trigger allergies? ›

Many people start complaining about sneezing or a runny or blocked nose not caused by a cold or another infection. Central heating may also cause exposure to other indoor allergens such as house dust mites [14–16].

Is HVAC hard on your body? ›

Like many construction trades, HVAC can take a toll on your body. You'll probably spend a lot of time on your feet and have to squeeze into some tight corners. Working in attics, basem*nts, and crawl spaces can be hard on your back. And the hours can be long, too.

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