Frequently Asked Questions


Do Surround Air-brand air purifiers produce ozone?
How do I know how much area I have?
What if my room is larger than the size covered by the air purifier?
What is a CADR Rating?
What is the Air Volume of my unit?
Is this machine safe to use around pets?
How much energy will my unit use?
What are the yearly replacement costs for my air purifier?
How shall I know when to replace the filter?
How do I change my filter or UV lamp?


Do Surround Air-brand air purifiers produce ozone?

With the exception of the XJ-3000 series, Surround Air-brand air purifiers produce virtually no ozone, far beneath the recommended levels set by the FDA, the UL and the California State Air Resource Board (CARB). The Multi-Tech XJ-3000C and XJ-3000D models have a programmable sanitizer function that can be turned on or off. But even with these two models produce ozone levels that are well within the 50ppb guidelines with the sanitizer turned on to the highest setting. Both have been tested and certified with the UL and the state of California for electrical and ozone safety.

Links to UL-standard ozone test results for Surround Air-brand air purifiers:

Intelli-Pro
Intelli-Pro 3
Multi-Tech XJ-3000C
Multi-Tech XJ-3000D
Multi-Tech XJ-3000E
Multi-Tech 2000


How do I know how much area I have?

Measure the length and width of the room and then multiply them together. This will give you the square footage of the room. For example a 20 x 30 room is 600 Sq. Ft.

Determining square footage coverage for an air purifier is not an exact science though, since there are many factors that will influence the amount of square footage an air purifier will cover.

The Association of Home Appliance Manufacturers (AHAM) developed the CADR system (Clean Air Delivery Rate) in an attempt to create a standard for square footage coverage, but this methodology does not take all pertinent factors into account (about CADR).

Surround Air ratings are based on multiple factors, such as fan power, ratings of comparable models, and the types of technologies used (such as air ionization). With air ionization, negative ions are circulated into the air and throughout the room if adequate air flow is present, increasing the amount of square footage that can be covered.

It should also be noted that the closer you are to the air purifier, the more efficiently the air at that distance will be purified, regardless of an air purifier's square footage rating. The areas at the outer extent of an air purifier's effective coverage area will not be purified as thoroughly as the areas closer to the unit.

Keep in mind that the square footage ratings offered by Surround Air are merely a guide, and not to be completely relied upon. Once in your home, there are several factors that can influence the amount of square footage an air purifier will effectively cover, such as:

  • Pollution Level. The higher the pollution level, the lower the effective coverage area.

  • Air Flow. The greater the air flow in an indoor area, the higher the effective coverage area.

  • Floor Plan Layout. The more open the floor plan, the higher the effective coverage area.

  • Air Purification Technologies. With filters, the air must pass through the filter in order to be purified. With air ionization, negative ions are circulated through the room.


What if my room is larger than the size covered by the air purifier?

Even if placed in a room larger than its square-footage rating, an air purifier can still help improve air quality beyond the area it is designed to cover if the room is open. This is especially true if there is good air flow and the pollution/allergenic level is not heavier than typical. The air in open spaces naturally circulates over time, and some of the pockets of air farther away from the air purifier may eventually shift into its sphere of coverage. You can also move the air purifier between locations to ensure broader coverage. But for optimal results, we would recommend buying multiple air purifiers to cover spaces larger than what it is rated for.


What is a CADR Rating?

CADR stands for "Clean Air Delivery Rate", which is a measurement method developed by the Association of Home Appliance Manufacturers (AHAM) in an attempt to institute a common standard by which to evaluate air purifiers. It is expressed as a square footage rating, based on particles removed at various size ranges, multiplied by the fan speed of the air purifier. However, the CADR testing method is controversial for several reasons. In which case, Surround Air uses the straight-forward air chamber test to determine the effectiveness of its air purifier models.

CADR is completely irrelevant for some of the pollutants people are most interested in removing, such as micro-organisms, chemicals and odors. The CADR testing method measures only solid particles.

In addition to ultra-fine particles, Surround Air also tests for the ability to inhibit mold cultures and to remove hydrogen sulfide. Hydrogen sulfide is one of the very worst, and most difficult-to-remove pollutants known to man. An air purifier's ability to remove H2S is a good indication of its ability to remove strong odors and volatile organic chemicals (VOCs).

Air chamber testing is straight forward, measuring the air purifier's ability to remove the pollutants present in the chamber. CADR is theoretical, factoring air flow and absorbability of the filter material.

As a result, CADR favors air purifiers with the strongest fans and thickest filtration media. In other words, it is geared toward more expensive and loud air purifiers that consume high amounts of power and energy, with expensive replacement filters.

In reality, air purifier users value low-noise models that use modest amounts of energy, with low replacement costs. In which case, the trick is to produce an air purifier that is effective, yet meets the demands of customers who do not want an overly expensive and disruptive air purifier.

Air chamber testing helps determine if a quieter, energy efficient air purifier featuring non-filter technologies is effective, in order to create a capable, yet user-friendly product to meet the demands of the consumer.


What is the Air Volume of my unit?

The amount of air that is circulated throughout the room depends on what the CFM (Cubic Feet per Minute) measurement is for the unit. Each unit we offer has a different CFM output that ranges anywhere from 31cfm to 180cfm when running the fan on the highest setting.


Is this machine safe to use around pets?

All of our units effectively remove pet dander and are completely safe to use around pets of any kind.


How much energy will my unit use?

The power consumption of each machine is calculated by the Wattage of each unit. The bigger the unit, the more energy it requires. The Wattage of our units range anywhere from 40 Watts to 80 Watts. This would equate to about $30-$60 in annual electricity costs if run continuously throughout the year, based on average cost per kilowatt-hour in the U.S. Many of the units that are touted for effectiveness, especially in CADR ratings, draw far higher amounts of electricity to operate, due to ultra-thick filters and over-sized fan motors in order to achieve maximum air movement. But with innovate air-cleaning technologies such as ionization and photocatalytic oxidation, Surround Air-brand air purifiers minimize power consumption while optimizing effectiveness.


What are the yearly replacement costs for my air purifier?

Surround Air-brand air purifiers are designed to keep replacement costs low. But the most effective air purifiers utilize technologies such as HEPA and carbon filtration, along with germ-killing UV purification, which require periodic replacement in order to maintain their performance. HEPA/Carbon filters will typically last about 12 months under normal conditions, and replacement filters range from $24 to $44. Most UV lamps should be replaced every 12 months as well, although a few of our models have lamps that will last more than 3 years, and the IP3 lamps (16 mini-LED lamps) do not require replacement. Photocatalytic oxidation filters will typically last 3-5 years. Taking all of this into consideration, Surround Air-brand air purifiers will typically cost $24 to $57 per year in replacement costs.


How shall I know when to replace the filter?

The HEPA/Carbon combination filters will typically last a year in normal environments, and under normal conditions. If there is a smoker in the house, you should replace it every 6-9 months. In a highly sanitary environment, you could probably get away with replacing the filter every 14-18 months. Some of our models include Filter-Replacement Indicators, which will begin blinking when it is time to replace the filter. But these are more of a guide than an absolute diagnostic barometer.

The best way to determine if it is time to replace the filter is to inspect the white, pleated side of the filter. When it is brand new it will be bright white, as it fills with contaminants it will turn gray, or even brown, in color. You can use the nozzle attachment of your vacuum to remove the dust that builds up on the surface of both sides of the filter. But over time, the white HEPA side will become gradually darker in color. You can hold a new sheet of computer paper next to it for reference. Once it becomes persistently gray in color, even after vacuum cleanings, it is time to replace the filter.


How do I change my filter or UV lamp?

Each air purifier's product manual shows how to replace filters and lamps with detailed, step-by-step instructions and diagrams. You can download product manuals here.


 

 Complete Line-Up of Surround Air Purifiers