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Ultra Low Resistance Allergen Filters for Cold Air Return Filter Grilles in Walls or Ceilings

by Barbara 22. August 2010 06:01

Question about the SafeHome Duo and the Safe Home System Cold Air Return Purifier, 16X20X1

Q: "What is the difference between the two units as far as air flow and filtration is concerned? I manage a clinic where we have several very large cold air filter grills. Some physicians use aerosol products during medical treatments. We are also concerns about keeping the level of dust, spores, etc. to a minimum as the forced air HVAC system recirculates air. The filter grilles are hinged. Currently we are using 1 inch fiberglass disposable filters. Thank you for your input. Steve."

Answer: Both types of air filters will fit your 16 x 20 x 1 inch air return filter grille.

The Safe Home Duo, is a two layered polyester filter with the second, inner layer being impregnated with carbon and potassium permanganate.The Duo offers the same allergen, odor and chemical removal as the System, but in a single 1" filter. Duos utilize an inner steel frame that creates a filter with self sealing edges for great filtration and whisper quiet operation. SafeHome Duos are available as individual 3 month filters. You may need to replace more often depending upon your facility. To install, you fold the excess material around the filter's internal frame to slide it into the grille and then tuck the remainder in so you can close the cover over the filter slot. This excess material helps seal the edges where the filter fits into the equipment and keeps air from going around the filter through gaps. Air should enter the white side, which traps allergens, and exit through the dark side, which traps gases and odors.

The SafeHome System Annual filter package consists of four pre-filters for dust, pollen, spores, etc. and one pollution filter. The pollution filter absorbs gases and odors and fits into the air duct behind the return grille with filter slot. The System has 125 grams per square foot of activated carbon and FormadaSorb to remove the most common, hazardous pollutants. The replacement filters for the filter slot are electrostatic air purifier filters. These pre-filters should be changed at least every three months.

More frequent changes may be necessary due to a wide variety of circumstances that increase chemical, odors and particles like allergens or dust. Examples of chemical and particulate sources include the following:

  • Painting or renovations
  • High levels of outdoor pollution
  • Burning candles or using air deodorizers
  • Cleaning agents
  • Shedding Pets
  • High activity levels

Rated at MERV 7, these filters are pleated with thin metal wire in diamond shapes covering the pleats. MERV 7 is an industry standard rating that means the filter removes 50% to 70% of particles down to 3 microns in size. With use, removal increases to more than 98% effectiveness.

The manufacturer recommends that the Safe Home System be used in the largest air return grill for each air system. So, one choice is to use the Duo filters in all but the largest air return grill. When you calculate the difference in price, however, you may elect to keep all the grille filters the same especially if they are the same size in each exam or waiting room.

Both the SafeHome Duo and the SafeHome System come in many sizes.

Thank you for your question. Please contact us if you need more information.

Sincerely, Barbara

 

 

 

Disposable Furnace Filters for Allergens, Formaldehyde and Other Chemicals.

by Barbara 28. July 2010 07:00

Question about the Safe Home Duo Air Purify Furnace Filter 16 x 20 x 1 In.

Q:"My furnace in our second home has a one inch filter slot. We run the furnace only in the winter. We have older carpeting and pressed wood cabinets in the kitchen that we think are out-gassing formaldehyde. We've considered an Amaircare whole house system but the cost is high for the frequency of use of our second home. How would your furnace filter help with the formaldehyde problem? We have a 16 x 20 c 1 inch filter slot. Thanks. John."

Answer: I recommend the Safe Home air purification furnace filter because it is so effective. This is a dual filter with a MERV rating of 8. MERV ratil layered polyester filter. There is a white pre-filter attached to a second polyester filter with embedded activated carbon and potassium permanganate. This air purifier filter has an internal steel frame. The polyester extends slightly beyond the metal frame so the filter seals very tightly in the slot. That way allergens, gasses, etc. cannot go around the filter edges.

The white polyester outer layer first receives the air flow: it removes pollen, mold spores, and other common allergens. The second layer features FormaldaSorb™ (potassium permanganate) and activated carbon that traps odors and hazardous gasses, such as formaldehyde, ammonia, and others. These are emitted by cleaning chemicals, paint, particle board, and other household items. No other one inch furnace filters are as effective at removing dust mites, mold spores, pollen, odors, cleaning chemicals, ozone, paint fumes, and common gasses like formaldehyde which triggers asthma and allergies.

The SafeHome Duo utilizes polyester layers as a prefilter and uses carbon and FormaldaSorb injected fibers for further filtration. This filter design uses mechanical filtration which offers the advantage of increased filtration efficiency over time because the particles themselves become part of the filter and there is no reliance on electrostatic charges which degrade over time. Mechanical filtration is particularly advantageous in humid areas or near kitchens because humidity and vapors significantly degrade pleated air filters’ electrostatic charge. By containing multiple densities of material, Duo filters are able to capture more particles while maintaining proper air resistance.

Safe Home Duo Filter Features:

  • Dimensions: 16" x 20" x 1"
  • Captures up to 95% of common household allergens
  • Eliminates odors from pets, paint, cooking, and more
  • Uses high density carbon and advanced compounds
  • FormaldaSorb™ traps hazardous gasses
  • Highly effective and affordable

Change the Duo at least every 3 months. Some conditions may require more frequent changes due to increased pollutants. Examples: furry pets, construction work, painting and smoking.

There are other filter sizes from which to choose as well. These include 12 x 12 x 1, 12 x 24 x 1, 14 x 14 x 1, 14 x 24 x 1, 12 x 25 x 1, 14 x 30 x 1, 20 x 20 x 1, 20 x 25 x 1, 20 x 30 x 1, and 24 x 24 x 1. If you need a custom size, contact us. There is a minimum of 12 units required for custom sizes. We'll get a quote to you in response to your email.

Thanks for your question.

Sincerely,

Barbara