Today’s products designed to help improve indoor air quality (IAQ) range from refinements of older technologies to new developments by trusted manufacturers. This article offers a sampling of some products contractors may consider adding to their existing arsenal of IAQ-related weapons.

Heat Pipe Technology’s FAX recovery ventilation air conditioners come in two versions: passive energy recovery ventilators and compressor-assisted heat recovery ventilators.

Fresh Air Ventilators

According to Heat Pipe Technology Inc., its new FAX line of recovery ventilation air conditioners comes in two versions: passive energy recovery ventilators (ERVs) and compressor-assisted heat recovery ventilators (CA-ERVs). The latter are available as straight A/C or heat pump models.

Compressor-assisted ERVs can save as much as 60 percent of the energy associated with building ventilation and provide neutral air, the company states. Standard units are available from 1,000 to 5,000 cfm. “Much larger systems are available for custom designs,” the company claims. With zero cross contamination, “The FAX line of energy recovery devices is suitable for laboratories, hospitals, schools, and industry.” The line is also available with bypass dampers for economizer cycle operations during mild weather conditions.

Fresh air makeup (FAM) units supply a controlled amount of fresh air to make up for normal ventilation functions, such as kitchen hoods and bathroom vents, the company says. “Heat pipes can save 30 percent energy in this application,” the company says.

FAM and FAX models can be custom designed for various climates and applications, the company says.

Contact Heat Pipe Technology Inc., Gainesville, Fla.; 352-367-0999;

Honeywell Inc. has introduced the ER200C2004 Perfect Window® fresh air ventilation system for use in southern climates where temperatures do not drop below 32 degrees F. “By eliminating frost control,” the company says, “this unit is priced more competitively than a full-featured unit.”

The product is said to provide homeowners with an advanced enthalpy heat- and moisture-recovery core to reduce the amount of moisture introduced to the indoor space, “thereby reducing the cooling load and saving energy.”

Designed for houses between 3,214 and 4,286 square feet, the Perfect Window features two fans, a fixed heat- and moisture-transfer core, and multispeed fan control.

Contact Honeywell Inc., Morris Township, N.J.; 800-345-6770, ext. 775;;

Honeywell’s latest Perfect Window® fresh air ventilation model was designed for use in climates where temperatures do not drop below 32 degrees F.

Improved Filtration

Camfil Farr has introduced a media-based adsorber for the control of airborne gaseous contaminants. The CitySorb™ CH is said to be ideal for HVAC applications in geographic areas where ozone may be a concern, and/or wherever the use of outside air for indoor contaminant dilution may be problematic, based on elevated levels of other gaseous pollutants.

Using the “IAQ Method” as prescribed in ASHRAE Standard 62, the company says its CitySorb CH is a tool to minimize the amount of outdoor air typically introduced to remove building contaminants, thereby reducing energy costs. The adsorber is available with a variety of media blends for requirements ranging from standard odor and VOC removal in HVAC systems, to the control of corrosive gases, ammonia/amines, or oxidizable gases in specialized industrial settings.

The CitySorb CH is designed for installation in side-access filter housings or built-up banks using an integral 1-inch nominal header. It offers low resistance to airflow (0.38 inches wg at 500-fpm velocity).

Contact Camfil Farr Marketing Dept., Riverdale, N.J.; 866-422-6345; 973-616-7771 (fax); in Canada, contact Camfil Farr, Laval, Quebec; 450-662-6035 (fax);;

D-Mark Inc. presents its “new and improved” CarbonWeb® (CW) filter roll medias. The medias are pleatable without wire backing, and are UL Class 2 approved.

CarbonWeb is a carbon-filled fiber media designed for low air resistance and high capacity. The materials, which are 1/8- to 3/8-inch thick, contain carbon loadings of 15, 25, 45, or 90 grams/square foot (equivalent to 160, 265, 480, or 960 grams/square meter). Roll medias are sold in 100-foot rolls, in a variety of widths. “Prefilter media can be added to improve particulate removal,” the company says.

The company’s new Odor Guard® (OG) pleated filters use what the company calls “the next generation of CarbonWeb filter media.” OG medium-duty filters have an integrated prefilter and are offered with granular carbon loadings of 200 grams/square foot of filter area (equivalent to 2,150 grams/square meter) in a 2-inch thickness; 100 grams/square foot (equivalent to 1075 grams/square meter) of filter area in 1-inch thickness.

OG light-duty filters are offered with granular carbon loadings of 50 or 25 grams/square foot of filter area (equivalent to 540 or 270 grams/square meter) in 2- and 1-inch thicknesses, respectively.

Contact D-Mark, Chesterfield, Mich.; 800-343-3610; 586-949-4181 (fax);;

White-Rodgers, a part of Emerson Climate Technologies, is promoting its SST Series electronic and ACM Series media air cleaners. Jeff Edgar, strategic program manager, White-Rodgers Wholesale Marketing, points out, “Each of our product categories is supported by multiple layers of consumer-focused marketing materials.”

The company’s research has shown that while many homeowners have a strong interest in improving their IAQ, “Most homeowners have little awareness of their indoor air environment and even less awareness of the solutions available to improve their IAQ,” says Edgar.

SST Series electronic air cleaners (EACs) use four-stage cleaning to remove up to 98 percent of pollen and pollutants, the company claims. These stages are the prefilter screen, charging section, collecting section, and optional charcoal filter. Four sizes are available for different airflow requirements.

ACM Series media air cleaners include a metal cabinet that can be mounted on the return-air side of the furnace to recirculate and filter air in the home.

Contact White-Rodgers, St. Louis;

UV Systems

Abatement Technologies’ in-line filtration systems are said to capture up to 97 percent of the particles that standard filters miss, including fine dust and dirt particles and pollens. Some models incorporate germicidal UV C-band (UVC) or “UV Plus” lamp technology.

According to the company, homeowners who already have upgraded particulate filtration can opt for the company’s in-duct lamp models. The 110-V CAP300 Model can be purchased with either a UVC-only lamp or a UV Plus. The 220-V CAP3220 Model is designed for 220-V heat pump installations.

All models feature a true HEPA filter that is certified to an efficiency of 99.97 percent or higher at 0.3 microns, the company says.

Contact Abatement Technologies Inc., Duluth, Ga.; 800-634-9091; 770-689-2600; in Canada call 800-827-6443 or 905-871-4720; 770-689-2601 (fax);

Isolate Inc. offers a duct-mounted combination UVC/HEPA air filtration unit with integral supply fan for space pressurization of isolation rooms. The unit may be used as either a positive- or negative-pressure IAQ filtration module to kill and capture microorganisms in the air.

The unit is designed for above-the-ceiling and in-duct mounting for existing (retrofit) and new air conditioning applications. “All air delivered by the unit is 100 percent treated with a very high dose of UVC kill energy for maximum microbe elimination, with a trailing 99.99-percent-efficient hospital-grade HEPA to stop airborne particulates down to a size of 0.3 microns,” the company says.

The unit can be added to air conditioning or makeup air systems of existing offices, homes, or government buildings, the company says.

Contact Isolate Inc., Houston; 713-937-9393;

Sidebar: Duct Evaluation Service

ATLANTA — Air Quality Sciences Inc. (AQS), an IAQ research and testing firm, has developed an environmental chamber test that measures the release of chemicals and particles from HVAC duct materials as building air is delivered to occupied spaces. This new technology enables the evaluation of HVAC materials for types and levels of indoor pollutants that can be released during typical building operation.

The test measures the release of respirable particles, formaldehyde, and other volatile organic chemicals, and allows for resulting indoor concentrations to be determined, the company says. Concentrations can then be compared to current IAQ standards and guidelines.

The new duct material protocol uses sophisticated systems designed to move a high-velocity airstream through the ductwork, the company says. Particles and chemicals that are released and delivered into an occupied space are measured down to extremely low levels.

The testing methodology is available to all manufacturers of duct materials, construction design managers, building managers, and others who want to measure the contribution of duct materials to indoor pollution. The Greenguard Environmental Institute has accepted this test method for measuring compliance with allowable pollutant emissions for the Greenguard Certification Program for Indoor Products.

AQS provides building consulting, mold remediation oversight, chemical and microbial analysis of indoor contaminants, environmental chamber product emissions testing, and compliance testing for the Greenguard Certification Program.

Contact Malou Hughes at ACQ; 770-933-0638, ext. 258;

Sibebar: Air Filter Data Web Site

Camfil Farr has launched an information Web site to provide regularly updated news on a range of timely air filtration issues. Facility engineers, building owners and managers, representatives of the media, and others may access the site atwww.camfilfarr.infofor news and technical information on the role of air filtration in SARS and infectious disease control, mold remediation, bioterrorism prevention, and other topics.

The site also contains comprehensive guidelines on air filtration for specialized facilities such as health care, hospitals and school environments. In addition, viewers may access news and reports on the latest filtration developments including the MERV system for evaluating filters, the importance of fiber size in filter performance, and the differences between charged and mechanical filtration media. Articles and reports on the site are available for download in PDF format.

Publication date: 06/30/2003