hvac system testing Articles

  • Minimizing Refrigerant Emissions in HVAC Systems

    Managing the operation and maintenance of a facility's air conditioning equipment has always been a major responsibility, as chillers often represent the single largest electrical load in a facility. Since the annual cost of operating chillers is a major ...


    By IHS

  • BACnet Interface for VFD Drive in HVAC

    Area of engagement Enable BACnet MS/TP support for VFD Drive in HVAC Solution The Client Leading OEM of AC Drives, Machine controllers, Robotics, Automation systems Overview Client was looking for a solution to enable BACnet MS/TP interface for its VFD drive in HVAC system. In addition, client also wanted support in ...


    By SoftDEL Systems

  • How to Extend the Life of Your HVAC System

    How to Extend the Life of Your HVAC System  The Heating, Ventilation, and Air Cooling or HVAC system that you’ve installed in your house ensures comfort and clean air indoors for the entire family. It’s also probably one of the costliest systems in your home. So it only makes sense that you’d want to get the most out of it before it starts to show any wear, and prolong its ...


    By Filter Buy

  • Rating criteria for vehicle in-cabin noise with emphasis on HVAC system operation

    Noise and vibration have an important influence on a customer's perception of vehicle quality. It is the purpose of this study to introduce a standard test procedure for measuring vehicle in-cabin noise levels. A combined vehicle base noise with all possible sources, including HVAC system, tyres, aerodynamics, under various driving conditions, is considered for developing the total vehicle cabin ...


    By Inderscience Publishers

  • UVC: Florida hospital puts HVAC maintenance under a new light

    HVAC system downtime during coil cleaning can compromise humidity and temperature control, potentially leading to air quality or comfort problems. Florida Hospital has found that high-output ultraviolet-C lights installed in the AHUs reduce or eliminate coil- cleaning programs — yielding ongoing energy savings, a reduction in HVAC system maintenance, and the elimination of cleaning ...


    By E-CO

  • Pulse-Power Water Treatment as a Green Scale Inhibitor for HVAC and Once-Through Industrial Systems

    Untitled Document Introduction The search for a nonchemical way to reduce scale formation has been the “Holy ...


    By Dolphin WaterCare

  • Blower Door Pressure Testing, Unvented Attics and Florida Homes

    I recently traveled to theCaribbean on a building science investigation. A large multi-national corporation owns several homes there for local executives. These homes had been plagued with dampness and mold growth problems for several years.  After several attempts to correct these problems, IET was called in, as we had ...

  • Dolphin System Water Treatment Study

    Untitled Document Introduction In December 2003 MCI contracted with BWI Solutions, Inc., a Sacramento based industrial ...


    By Dolphin WaterCare

  • A healthier air supply

    A recent study carried out at an IVF Lab in the US has shown that Steril-Aire’s UVC Emitters™ used in HVAC systems can play a critical role in improving clinical outcomes Aseven and a half-year study conducted in the in vitro fertilisation cleanroom laboratory of the Lehigh Valley Hospital and Health Network in the US found that the use of ultraviolet C or “UVC” lights ...


  • Case study - At Bertucci`s, SiteSage pays for itself in under 1 year

    Challenge: Get energy costs under control Locations: 3-store Pilot, followed by 10 more locations; planned rollout at all 89 locations Scope: HVAC control & management, equipment performance monitoring & diagnostics, food safety monitoring Results: 12% electricity use reduction, 8% gas use reduction, 11 month payback In 2013, Bertucci’s, a Massachusetts-based operator of 89 ...


    By Powerhouse Dynamics

  • 6 Things You Should Know About Legionella

    Just last August, about 120 people in the South Bronx were infected with Legionnaires’ Disease and 12 people died. At the time, up to 5 cooling towers in the area tested positive for Legionella, a fatal bacteria that grows in warm, damp environments and can spread once contaminated water has become aerosolized and the vapor is inhaled. In this post, we’ll be discussing where ...

  • Case study - Arby`s energy management and food safety

    Challenge: Get energy costs under control Locations: ≈900 company-owned restaurants Scope: HVAC control & management, food safety monitoring Time to deploy: Five months Results: 7.6% aggregate energy savings reported by Arby’s In 2012 Arby’s, a leading global quick-service restaurant company, decided to deploy remotely controlled thermostats across its ...


    By Powerhouse Dynamics

  • Case study - Automotive manufacturer chooses the QUADRANT SR Thermal Oxidizer

    The worlds largest automotive manufacturer recently installed our QUADRANT SR-Series Thermal Oxidizer for use at destroying CO and VOC emissions from their engine test cell facility. The test facility houses several engine, transmission, and chassis dynamometer’s. The manufacturer demanded a system that would provide the highest uptime reliability and highest performance. The QUADRANT ...

  • Northern Virginia community college manassas

    Situation In May of 1997, Zentox Corporation replaced a traditional chemical treatment program at the Northern Virginia Community College Manassas campus with an ozone water treatment system centered on the Clean Streams™ Ozone Transfer Process. Two 220-ton BAC cooling towers were installed as part of a renovation of the chiller plant and condenser water system. The campus has two ...


    By Zentox Corporation

  • Chill Out: Chemical Descaling of Condensers Maximizes Efficiency

    Chiller units — open loop or closed loop — naturally experience performance degradations over time. As noted by ...

  • City of Warm Springs, Georgia - Case Study

    The City of Warm Springs is a small community of approximately 500 residents located in central Georgia. In 2010, water testing found a radium level between 8 - 11 pCi/L and a Gross Alpha level of 25 pCi/L, both above state and USEPA drinking water regulations of 5 pCi/L and 15 pCi/L respectively. Engineering Management Inc (EMI) conducted a pilot test in late 2010 to test a manganese dioxide ...

  • Control of Aerosol Contaminants in Indoor Air: Combining the Particle Concentration Reduction with Microbial Inactivation

    ABSTRACT An indoor air purification technique, which combines unipolar ion emission and photocatalytic oxidation (promoted by a specially designed RCI cell), was investigated in two test chambers, 2.75 m3 and 24.3 m3, using nonbiological and biological challenge aerosols. The reduction in particle concentration was measured size selectively in realtime, and the Air Cleaning Factor and the Clean ...

  • UVC keeps indoor air, a/c coils clean at College of the Sequoias

    At College of the Sequoias (COS), a California community college in Visalia, CA, indoor air quality is a high priority. “We have not had IAQ complaints, so when we discovered naturally occurring mold growth in the air conditioning coils, we decided to treat it proactively — before mold-related allergens circulated from the HVAC systems into the occupied space,” stated Eric ...


  • Controlling Bacteria In a Clean Room Environment

    Maintaining the integrity of a cleanroom is a constant battle. The first step to deciding which method, or combination of methods, to employ is to identify the prime sources of contamination. There are three prime sources of contamination through which the integrity of a cleanroom might be breached. First, there is the human element. While many processes might be automated, many situations remain ...


    By GVS Filter Technology

  • EPA mandates proper refrigerant gas recovery processes

    New EPA regulations require facilities that use air conditioning and refrigeration equipment to have a refrigerant recovery plan in place. The plan is needed to make sure that any harmful gases that might leak are captured. Refrigerant gases contain hydrochlorofluorocarbons, known to cause severe damage to the ozone layer and to promote global warming. A comprehensive plan is now in place to ...


    By Verisae

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