Common Questions

Do SafeHome Filters cause too much air resistance?

Air resistance problems can occur with any filter. Click on the question to learn about this common problem, how to prevent it, and for air flow specifications of SafeHome Filters.

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Why is the System pollution filter so heavy after using it?

We’ve received a few questions about the increased weight of the SafeHome System odor and pollution filter when changing it. System filters can hold up to 250 grams, or the weight of two pleated filters, of cozone, VOCs and other chemicals.

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Do MERV ratings impact air resistance? What is right for my home?

There is a common belief among HVAC contractors that the ‘proper’ MERV rating for home air filters is MERV 7. This is based on a convenient assumption which is, unfortunately, wrong. MERV ratings give less information than you might think.

Here’s what you need to know.

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How do I install a SafeHome Filter?

SafeHome Filters are designed to be as easy to use as a regular filter. Because they look quite different though, here are some additional installation details.

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Do I need a SafeHome FiIter for every air return grill?

Our general recommendation is to use a SafeHome Filter in each of your main air returns. Most homes have a large air return in the central living space of each floor with smaller returns in each room. You will achieve best results with one for each vent, but this may not be necessary unless you or a family member is particularly sensitive to chemicals.

We quickly achieved a 40% reduction in VOCs using a SafeHome Filter in one of two air returns. Over longer periods, tests have show reductions of up to 90% as air recirculates through the home.

How often should I change my SafeHome Filter?

The easy answer is that SafeHome Duos lasts up to 3 months, SafeHome System Chemical Filters lasts up to one year and the allergen pre-filters for the System last up to 3 months. The real answer is “it depends”.

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How do I know if I need a SafeHome Filter?

The EPA found that American households have higher concentrations of hazardous gases than outdoor pollution in urban and rural areas. While everyone’s health is at risk from these gases, your particular level of risk depends on your level of susceptibility and the presence of pollution sources in your house. Children and the elderly are particularly susceptible, but even healthy adults can be at great risk.

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Does the filter only work when my air system is running?

Air must pass through any filter for it to work, and the air in your HVAC system is pulled through the filter by the fan in your air system. If you fan is not running, it is like having a massive air purifier sitting unused in the corner.

We had great test results with the fan running intermittently. For best results, you would set your fan to run continuously or install a programmable thermostat that circulates air in your home automatically for optimal home comfort and air filtration, such as the LUX CAG1500 ($49.99 at

Also, keep in mind that gas concentrations are highest when you seal yourself in your home during the winter or summer months. This is also when you system is going to run the most, so air will be filtered regularly.

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What chemicals and odors are removed by the SafeHome Filter?

SafeHome Filters address a very wide range of gases and odors that are common in household air. Focusing on effectively addressing ozone, formaldehyde and Volatile Organic Compounds (VOCs) such as benzene, some of the most common and hazardous gases in household air, has made our filters highly effective against a wide array of odors, chemicals and compounds that you may encounter everyday.

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Which type of SafeHome Filter should I buy?

The type of SafeHome Filter that you need depends on whether your regular air filter is located in your air return vents or in your air handler or furnace. See our Product Selection Guide to determine which is right for you.

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