Hotel Indoor-Air Quality: Balancing Comfort, Health, Efficiency
In July 1976, the American Legion convened at the Bellevue-Stratford Hotel in Philadelphia to celebrate the country's bicentennial. Within two days of...
An Inside Look at Air-Filter Selection
Air-filtration technology has evolved tremendously since the advent of air filtration during the 1930s. The air-filter-selection process has evolved as...
Underfloor-Air-Distribution Design Concepts
The placement of raised-floor tiles and carpet panels completed the installation of a raised-floor UFAD system in the New York Times Building in New York City....
High-Plume Dilution Blowers Chosen to Exhaust Medical-Research Labs
In 2004, construction of the 203,000-sq-ft Kansas Life Sciences Innovation Center began on The University of Kansas Medical Center campus in Kansas City,...
Self-Adhering Insulation Helps Ease Demanding Hospital HVAC Renovation
At Caritas Good Samaritan Medical Center in Boston, fiber-glass insulation inside of three air-handling units (AHUs) serving the facility's operating...
VENTILATION
Filtration media With two-layer construction, odor-control filtration media from Kimberly-Clark eliminate odors and other irritant gaseous contaminants...
Air-Intake-Filter-Screen Technology Helps Optimize AHU Performance
At a major university in the Midwest, one of the main air-handling units (AHUs) serving a 65,737-sq-ft biomedical building was experiencing ongoing problems...
Packaged Rooftop Solution Improves Energy Efficiency, Occupant Comfort
Located in Columbia, Pa., Park Elementary is a kindergarten-through-sixth-grade public school with approximately 500 students and 50 teachers. Recently,...
Energy-Saving Strategies for Rooftop VAV Systems
Rooftop variable-air-volume (VAV) systems are used to provide comfort in a wide range of building types and climates.1 This kind of system consists of a packaged rooftop air conditioner that serves several individually controlled zones. Each zone has a VAV terminal unit that is controlled by a temperature sensor. This article will discuss HVAC-system control strategies that can be used to save energy in rooftop VAV systems....
Laboratory Methods of Testing Fans for Certified Aerodynamic Performance Rating
The Air Movement and Control Association International (AMCA International) announced that the Board of Standards Review of the American National Standards Institute (ANSI) and the American Society of Heating, Refrigerating, and Air-Conditioning Engineers...
Air-Treatment Systems for Controlling Hospital-Acquired Infections
This article will examine the epidemiology and aerobiological pathways of airborne nosocomial infections and review air- and surface-disinfection technologies, including ultraviolet germicidal irradiation (UVGI). First, however,a brief synopsis of applicable guidelines,codes, and standards will provide background on current methods of nosocomial infection control....
Airflow-measurement technologies
I must state our objections to the December Design Solutions article Pitot-Tube Technology Helps Maintain Proper Airflow in Fitness Facility, the intent...
The Role of HVAC Insulations in Health Care
Hospitals contain many different types of environments, including public areas, sterilization facilities, soiled-laundry rooms, operating rooms, intensive-care...
The Nose Knows
A 30-plus-story hotel had four separate kitchen exhaust systems that all discharged through a mechanical-room wall just above the fifth-floor low roof....
Grease Removal and Kitchen Exhaust Systems
This article will examine the ins and outs of grease removal in kitchen exhaust systems. Grease control in commercial kitchen exhaust has seen some significant changes in recent years. The changes are a primarily a result of research, code revisions, and improvements in grease filtration and extraction technology....
The True Story
During the first morning meeting of the day, several supervisors suddenly jumped up and ran out with their pagers in hand. Five fully manned Fire Department New York (FDNY) fire trucks drove up to our high-rise building. The fire-alarm system indicated smoke at a top-floor air-handler duct smoke detector (DSD). No smoke was evident, so the problem counted as a false alarm. Unfortunately, FDNY charges about $500 each time it responds to a false alarm. The firefighters reset the system, and everything appeared to be fine. We checked out the DSD, and nothing was wrong with it. It was working exactly as specified. ...
Movement of Air in Industrial Plants
Natural air movement in an industrial plant is like the movement of a small boy. It is never completely still, does not seem to have any definite pattern,...
VAV-Box Selection, Code Conformance
Once simple, variable-air-volume- (VAV-) box selection has become an iterative process complicated by energy- and ventilation-code requirements. What's...
Air-Dispersion Diversity of Fabric Duct
Fabric duct is one of the fastest-growing segments of the HVAC air-distribution market, representing more than 5 percent of open-architecture-ductwork...
Pitot-Tube Technology Helps Maintain Proper Airflow in Fitness Facility
Airborne particulate not only degrades indoor-air quality, it can affect the performance of HVAC equipment. That was evident at the Rochester Institute...
Assume Nothing
The building was constructed as a large automotive garage, capable of serving eight large trucks, with adjoining two-story offices, showers, and locker rooms. The offices, showers, and locker rooms were separated from two-story-high truck bays by a fire-rated concrete masonry wall. Conditioned air was provided by a number of package-terminal-air-conditioning (PTAC) heat-pump units under the windows. ...
Assume Nothing
During an assignment for a large municipality, I was asked to investigate indoor-air-quality issues in a newer building. The building was constructed...
UVC Lights Enhance Indoor-Air Quality at Wastewater-Plant Office Facility
Built in 2002 to accommodate nearly 400 city employees, the Pregerson Building, located at the center of the Hyperion Wastewater Treatment Plant in Los...
NEW EQUIPMENT & RESOURCES
Air-handling-unit brochure A product brochure from Mainstream describes the company's custom-built air-handling units and replacement coils. The eight-page...
Controlling Laboratory IAQ and Energy Costs
Editor's note: This article follows Ventilation Strategy for Laboratories, which appeared in the August 2007 issue of HPAC Engineering. Laboratory procedures...
Recent Comments