RE: Dynamic / Electrostatic air filters

[Guest guest]

Good Afternoon

Lew,

Filter that are a MERV 7 or 8 are

typically used to keep HVAC systems components clean, i.e. Coils, blower, duct

work, etc.

As far as IAQ is concerned and air

filtration efficiencies typically would be a MERV 13 although some have argued

a MERV 11.

I would suggest to you or anyone that when

new or the latest technologies on air filtration are developed and marketed to

the public

that you would request an Independent Test

report based on ANSI/ASHRAE Standard 52.2 to verify efficiency performance.

We see TV commercials all the time touting

these air filters and air cleaners as the “best” on the market

today.

Also you may want to consider why these

products are Not used in a Cleanroom environment or a Hospital Surgery Suite?

There are time tested and proven methods

of effective air filtration available today…you may want to check out the

National Air filtration Associations

(NAFA) website at www.nafahq.org. They are a non-profit professional

trade and certification organization.

I hope this helps,

Steve

AIR INDUSTRIES, INC.

North Andover, MA 01845

Office:

Fax:

Mobile:

Dynamic /

Electrostatic air filters

Hi All:

Just wondering if anyone is familiar with effectiveness of

electrostatic filter banks. We have our return air being filtered by a

bank of about 200 filter pads in electrostatic housings. Six of our 15

large Haakan rooftops have been fitted with these filter housings and

electrostatic filters. The media is a composite of fiberglass type

matting sandwiching a carbon filter media. The return air is being met

by the filter bank and then goes through a heat wheel. After that, it

goes to the mixing chamber where it either mixes with outside air or

goes into the outside air via the economizer dampers. However, mostly

the outside air dampers are open to exhaust 100%. Very little return

air is mixed with supply air.

Thanks for the replies in advance.

LEW