Healthy Clean Air

Filtration Efficiency and Pressure Drops

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I just read the very excellent article in the ACHR NEWS about HVAC systems and the spread of COVID-19. The article is a conversation from experts from Johnson Controls, Trane, and ASHRAE. Pretty good talent there!

 

If you haven’t read it, please do. Basically the conversation discusses HVAC, airflow, and the recommended solutions for controlling IAQ for health. As has been often told by ASHRAE, ventilation is king. And keeping the system operating efficiently through high-efficiency filtration. Humidity control is also mentioned as an important component that sometimes gets overlooked (but shouldn’t ever) as it relates to virus protection.

 

Filtration Efficiency and Pressure Drops

 

One note of particular importance that was missing from the filtration conversation is that of higher MERV filters. These help trap more airborne contaminants and do a better job of protecting the HVAC system.  And as our own John Bloemer, Executive Consultant and Engineering Fellow reminds us, the MERV conversation is an opportunity to provide both.

 

“Installing a 4” filter provides lower pressure drop even at higher MERV ratings, up to a MERV 16, over ANY 1” or 2” filter”, John reminds us.  “If a homeowner has a 1” filter they may have limited options for increased filtration efficiency, but working with their HVAC professional we can provide very low-pressure drop at higher filtration levels”.

pressure drops over time

Air Flow Increases in Larger Filters

 

John continues, “Think of media as a straw.  The bigger the straw the easier it is to get water through it (or air in this case). Same thing with a water hose.

 

Increasing the amount of media by increasing its depth (4” vs 1”) makes it is easier to get the air through the filter and also increase filtration efficiency.  With the overall size of AprilAire Media Air Cleaner cabinets, you can provide some of the highest filter efficiencies at the lowest pressure drops on the market”.

 

AprilAire MERV 16 4” filters create a lower pressure drop than a 1” MERV 8.  Higher efficiency does not have to mean higher pressure drops.  An added bonus: 4” filters last 3-4 times longer than a 1” filter, so fewer changeouts, and fewer callbacks.

Healthy Home

Optimizing Indoor Air: The Role of Humidifiers in Energy-Efficient Homes

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Modern homes are built for maximum energy efficiency, reducing natural ventilation, and limiting the amount of dry outdoor air entering the home during the heating season. This has led to a misconception that humidifiers are unnecessary in newer homes. Research shows that without a humidifier, indoor humidity levels drop below what’s needed to maintain comfort and preserve the home. HVAC professionals play a key role in addressing this issue by recommending and installing humidifiers to ensure proper Indoor Air Quality and balanced moisture levels for customers.

 

Learn more about this study here.

Healthy Clean Air

The Growing Need for Better Indoor Air Quality

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With 1 in 5 Americans suffering from asthma and allergies, Indoor Air Quality is a major concern. HVAC professionals play a key role in addressing this issue by recommending effective air filtration solutions.

 

Whole-Home Electronic Air Cleaners: A High-Performance Solution

Unlike standard mechanical filters, electronic air cleaners (EACs) use an electric charge to capture even the smallest airborne particles, providing superior filtration throughout the home. Installed within the HVAC system, they effectively remove allergens, dust, and other contaminants.

 

Why Recommend an Electronic Air Cleaner?

  • Higher Efficiency – EACs outperform traditional filters, especially for tiny airborne particles
  • Comprehensive Air Filtration – Integrated with the HVAC system, they clean air in every room
  • Ideal for Allergy & Asthma Sufferers – Helps reduce triggers like dust, pollen, and pet dander

 

While industry testing standards for EACs are still evolving, independent studies confirm their effectiveness. Offering whole-home electronic air cleaners gives contractors a high-value solution to improve IAQ and enhance customer satisfaction.

 

Learn more here.

Healthy Humidity

The Impact of Whole-Home Dehumidification on Indoor Comfort and Energy Efficiency

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As an HVAC professional, you know that indoor humidity levels can impact not just occupant comfort and health but also the home itself. Too much moisture in the air can lead to mold, musty odors, and damage to wood floors and furnishings. Unfortunately, standard air conditioning (AC) systems provide limited humidity control—especially when they’re not actively cooling.

 

That’s where whole-house dehumidifiers come in. A recent study found that using a whole-house dehumidifier alongside AC can significantly improve humidity control and even help reduce energy usage. By keeping indoor moisture levels in check, your customers will feel more comfortable, prevent potential damage to their home, and may even save on their energy bills.

 

Learn more about this study here.