HVAC Filter Knowledge Base

Why Your Home's Filter Has Turned Black

January 28 2019

Quick answer: Soot, mold, and the severe build-up of debris are the three main reasons why your air filter may be turning black. However, even though you may think it’s not a big issue, it’s one that really needs to be fixed to prevent causing further damages to your entire HVAC unit. Replacing your furnace filter is a vital part of ensuring that you’re keeping your HVAC unit in the best possible condition. Clean air filters are what enables the system to capture and remove pollutants, ensuring that the air within your home is as hygienic as possible. However, even if you keep up with changing your air filters at least every three months, you may still be finding that...

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Difference Between MPR and MERV Filter Ratings

January 28 2019

Difference Between MPR and MERV Filter Ratings     Quick Answer: The difference between MPR vs MERV is the fact that MPR was created by the company 3M and only 3M filters use this scale. The ratings also consider different elements. MERV effectively rates the filter’s ability to capture and filter out all pollutants and particles, whereas MPR specifically rates the filter’s ability to capture particles smaller than 1 micron.   When it comes to purchasing a new air filter, you may feel out of your depth when trying to understand the various acronyms that you’ll find within product listings. More specifically, you might find yourself caught up on what MERV and MPR really mean, and what the difference between...

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Do Pleated Air Filters Restrict Airflow?

November 05 2018

If you’re trying to choose the right air filter, you might come across finding yourself asking whether pleated air filters restrict airflow to your HVAC system. Simply? Yes, pleated air filters will restrict your indoor airflow, but only to an extent which is to be expected from the conditions of the filter itself. Now, a lot of people will hear that pleated air filters cause airflow restriction, and they automatically think that this is a bad thing so the filters aren’t right for what they’re looking for. This is not at all the case – it’s common for filters to restrict the movement of your property’s air to some extent, and it’s completely fine as long as you’ve chosen a...

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How Many Air Filters Does A House Have?

November 05 2018

How Many Air Filters Does A House Have? If you’re a homeowner, it’s always a good idea to have a good understanding of where exactly in your property your air filters are and how many your house has. Different houses and different HVAC units are going to require a different amount of filters. Some homes even have more than one HVAC unit or there may be filters behind the air returns in each room. Why You Should Know Where They Are To be able to replace your air filters, you need to know where to locate them and which way to put the filters in. New filters help prolong the life of your HVAC system and keep it working as...

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Furnace Home Maintenance Tips

August 11 2018

Furnace Home Maintenance Tips   During any season, but especially the summer and winter, you want to be able to know that you can trust and rely on your furnace to work as efficiently as possible. That’s because it’s more likely for our furnaces to give out and require repairs when harsh weather conditions are present and we need our heating and air conditioning the most.   However, with a few easy DIY furnace maintenance tips, you’ll be able to check that your unit is working at its maximum capacity without having to go to the expense of calling in professionals. Many homeowners overlook the importance of giving their furnaces more TLC, but it doesn’t take all that much time...

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How To Check And Light A Furnace Pilot Light

August 11 2018

How To Check And Light A Furnace Pilot Light          Whilst many homeowners make use of electronic ignition furnaces, it’s not uncommon to still use a gas furnace fit with a standing pilot light. This is a light that burns continuously and works with the thermocouple within the furnace to control the flow of gas and the ignition of the burners.   However, pilot lights can go out due to the smallest breeze, and need to be regularly checked to ensure their efficiency. Here’s a simple guide on how you can easily check your furnace pilot light and a video on how to relight it if you need to.                                     Checking Your Pilot Light   Depending on what type of...

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What Do Furnace Filters Do?

April 26 2018

What Do Furnace Filters Do?   The air filter within a furnace is often overlooked yet could single-handedly prevent your furnace from operating at maximum efficiency if not maintained properly. Beyond cleaning the air you breathe, a furnace filter’s primary job is to protect the furnace, and more specifically the blower fan, from any undesirable material that could clog up the device. Keeping your filter in check will allow your furnace fan to successfully blow heated air as needed. Additionally, the filter will clean your air to some degree, as an added bonus.   When cold air goes into a furnace return duct, it is hardly clean. In fact, the air that cycles through your furnace is likely filled with...

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Indoor Air Quality: Is Your Home’s Air Really Safe?

August 17 2017

  Indoor Air Quality: Is Your Home’s Air Really Safe? Clean air is important for all of us. We’re breathing 24/7, so if the air is dirty, then contaminants are constantly entering our lungs. Dirty air can lead to negative health effects, from a minor cough to more serious respiratory illnesses. But where is the dirtiest air that we breathe everyday? The answer may surprise you. When you think of dirty air, you may imagine a factory smokestack belching pollutants into the sky, or the crowded streets of a city. What you are probably not thinking of is your own home. That’s right. The air in your home can be just as dirty as the outdoors. Further, in recent years...

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HVAC Air Filter Types and Replacement Guild Lines

May 25 2017

HVAC Air Filter Types and Replacement Guild Lines After a long day at work, whether you are in the country or city, you deserve to feel and breathe clean air in your home. But, something as simple as clean air inside is more rare than you may think. According to Environmental Protection Agency (EPA), indoor air pollutants rank among the top five environmental health risks. The main cause for this is that in the U.S., high construction standards have led many homes to be almost airtight. This contributes to poor air quality as it stops fresh from entering your home. How To Improve Indoor Air Quality First, provide ventilation to allow fresh air pass through the home. To make your...

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What is a Furnace Filter Box?

April 27 2017

What is a Furnace Filter Box? Quick Answer: A furnace filter box holds a filter in a perfect position to allow air to flow through from the furnace to the filter. Without a furnace filter box, gaps may allow dirt and dust to bypass the filter and spread in your home via furnace filter duct leaks.   The filter of your furnace is responsible for ensuring optimal operation and preventing unwanted contaminants from entering the machine. What you might not know is that there is a furnace filter box for placing the filter. Your furnace or HVAC system comes equipped with varied sizes of filters for promoting superior filtration, healthier breathing environment, and cleaner overall air. They are designed to...

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Important Information


The manufacturer has discontinued the MERV 6 / APR 450 filters from their line up, our suggested replacement is the MERV 8 / APR 650 Gold filter, you may see the Emerald MERV 6 / APR 450 still on the website, we are actively removing that MERV/APR


** The typical ship time for orders is now around 15 to 20 business days **

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