Specialty and Architectural Lighting

Background Building: 3-story - 1st story retail, 2nd & 3rd story offices Building Completed: 2021 Windows: Sealed, Inoperable HVAC: Rooftop units - provide both heating and cooling with economizer control Indoor Air Quality Monitor: Kaiterra Sensedge Mini The focus of this case study is one 24 hour period for a 100 sq ft office equipped with an air quality monitor. The office is conditioned with supply air from the HVAC system. For this 24 hour...

Managing indoor air quality in the workplace is an important tool for business owners and office managers to improve employee productivity, reduce sick leave and boost employee attitudes about coming to work every day. A Forbes study showed that over 65% of employees said they were more productive in office environments that promote a healthy environment. In this same study, air quality was reported by employees as the most positive influence on wellness in the...

The importance of indoor air quality for work and classroom environments has become, with a strong push from the COVID virus, a top-of-the-list priority for building owners and managers as workers and students return to offices and schools. The strategies for cleaning indoor air of pollutants that adversely affect occupants differs depending on the contaminant. For protecting occupants from a virus or bacterial infection, a common approach is to use ultraviolet germicidal (UV-C) equipment to...

Interest in indoor air quality in public buildings such as offices, schools and other institutions has increased as the demand for lower energy consuming buildings has resulted in tighter building envelopes that reduce uncontrolled leakage of heated or cooled air. Tight buildings place a premium on the importance of ventilation. When air change rates and air filters are not adequate, the chance of health impacts on occupants increases. Indoor Pollutants Tight buildings can save energy....

Owners and facility managers looking for a way to disinfect the indoor air in offices, medical centers, retail stores, schools and residential care facilities will find that their HVAC system may provide the safest and most cost-effective approach. Buildings equipped with a ducted heating, ventilating and air-conditioning (HVAC) system are prime candidates for in-duct ultraviolet (UV-C) units that can provide whole-building air sanitizing. UV-C germicidal lamps emit 253.7 nanometer wavelength irradiation that, in sufficient doses,...

In addition to the deadly and debilitating impacts of COVID-19, its spread within communities has also illuminated the inadequacies of basic prevention and control strategies in place at public facilities and institutions. One of the most glaring examples is residential care facilities. There are currently (2021) over 16,000 nursing homes and long term care facilities in the U.S. Of the total confirmed COVID-19 cases in the U.S. as of April 2021, residential care facilities accounted...

Upper air ultraviolet germicidal equipment is designed to provide air disinfection within an occupied space. The louvered upper air units are wall or ceiling mounted above the "human zone" in the space, generally at 7 feet or higher. The usual UV-C 253.7 nanometer (nm) wavelength emitted by the germicidal light bulbs is directed out of the unit by the louvers and into the layer of air at or above the mounting height of the unit....

While sellers of LED lighting often promote the savings benefits of reduced maintenance because of the long life of LED light sources, this can obscure the fact that maintenance remains a key function for the successful operation of LED systems. Maintenance of all types of commercial lighting systems includes re-lamping, power supply management, controls optimization and fixture cleaning. LED systems are no different, even if the specific tasks are not the same. Whether maintenance is...

Dating back to the late 1960's and early 1970's, ultraviolet light was used to cure wood fillers and coatings on furniture. Since then, with the development of a wide range of UV curable materials and specialized equipment, UV curing has grown exponentially - widely adopted in manufacturing, graphic arts, and printing. Technically, UV curing is the polymerization of a coating, adhesive, or ink when it interacts with ultraviolet radiation. This process makes possible rapid drying...

While projector lamp modules may fit only one or a limited number of projectors, the bulb inside of the cage may fit dozens or hundreds of projectors from a wide range of manufacturers. This makes bare projector bulbs a popular and versatile product. While it's far easier to replace the entire projector lamp module, bare bulbs are often significantly less expensive. The challenge with buying projector lamps - in housing or bare bulbs - is how...