Improved methods for reducing and preventing nosocomial infections is provide comprising installing one or more dry hydrogen peroxide (DHP) generating devices into a healthcare treatment area, producing DHP, and maintaining the concentration between 1.0 parts-per-billion (ppb) and 200 ppb.

Improved methods for reducing and preventing nosocomial infections is provide comprising installing one or more dry hydrogen peroxide (DHP) generating devices into a healthcare treatment area, producing DHP, and maintaining the concentration between 1.0 parts-per-billion (ppb) and 200 ppb.

The present disclosure relates to a multilayer fabric media comprising a non-woven membrane of fibers comprising at least one polymer in combination with at least one photoreactive agent mounted on a woven or non-woven substrate and coated with a light transmissible protective layer, to methods of forming such multilayer fabric media, and to articles of manufacture made therewith.

The present disclosure relates to a multilayer fabric media comprising a non-woven membrane of fibers comprising at least one polymer in combination with at least one photoreactive agent mounted on a woven or non-woven substrate and coated with a light transmissible protective layer, to methods of forming such multilayer fabric media, and to articles of manufacture made therewith.

An air conditioner unit includes a blower fan, an inlet grille upstream of the blower fan, and an outlet grille downstream of the blower fan. The air conditioner unit also includes an air filter positioned between the inlet grille and the outlet grille with a belt encircling and enclosing the air filter on four sides. The air conditioner unit further includes a motor operatively connected to the belt. The motor is configured to rotate the belt around the air filter and thereby clean the air filter.

The present disclosure provides a disinfecting device for a central air conditioner, which uses high-powered ultraviolet rays to efficiently and rapidly eliminate viruses, and uses two sets of parallel reflectors to reflect and overlap light curtains of the high-powered ultraviolet rays back and forth. In this way, small-sized aerosols with viruses can be eliminated, and no secondary pollutants such as ozone are produced in a process of purifying and disinfecting air by the ultraviolet rays. The entire device has a simple structure and can be used in the central air conditioner with an existing architecture. The entire device only needs to be provided in an air supply duct of the central air conditioner.

The present disclosure relates generally to air intake filter assemblies, and more particularly to air intake assemblies for an outdoor portion of a heating, ventilation, and/or air conditioning (HVAC) system. In an embodiment, a filter assembly is configured to filter an airflow entering an air intake of a HVAC unit. The filter assembly includes a first layer of a first coarse mesh, a second layer of a second coarse mesh, and a fine filter disposed between the first layer and the second layer. Additionally, the fine filter includes an upper level and a lower level with respect to the airflow, and wherein the lower level facilitates accumulation of fine debris captured from the airflow entering the air intake of the HVAC unit.

The present disclosure relates generally to air intake filter assemblies, and more particularly to air intake assemblies for an outdoor portion of a heating, ventilation, and/or air conditioning (HVAC) system. In an embodiment, a filter assembly is configured to filter an airflow entering an air intake of a HVAC unit. The filter assembly includes a first layer of a first coarse mesh, a second layer of a second coarse mesh, and a fine filter disposed between the first layer and the second layer. Additionally, the fine filter includes an upper level and a lower level with respect to the airflow, and wherein the lower level facilitates accumulation of fine debris captured from the airflow entering the air intake of the HVAC unit.

An air cleaning system having at least one dust sensor and a method for controlling the air cleaning system may improve accuracy of dust sensors through linkage control of the dust sensors, and may normally operate a faulty air cleaner using dust sensors of the remaining communicating air cleaners other than the faulty air cleaner even when any one of the dust sensors fails to operate. The air cleaning system may select a master dust sensor through linkage control of the dust sensors, and may operate the plurality of air cleaners only using sensor information of the master dust sensor. Therefore, the air cleaning system may stop operation of the remaining dust sensors other than the master dust sensor, may reduce measurement noise produced by the dust sensors and power consumption, and may increase a lifetime of the dust sensors.

In some embodiments, there is provided a scrubber system for cleaning return air in an HVAC unit, where the scrubber system attaches directly to an inlet of the return-air side of the HVAC unit, for example, by the mating of a flange on the system with a matching flange on the HVAC unit. The bolt-on scrubber system may comprise one or more sorbent materials, a fan for circulating return air through the sorbent, a damper-controlled inlet and a damper-controlled outlet to the attached return air side of the HVAC unit. Further, an additional air flow channel and a damper may be included in the system to control the flow of outside air into the HVAC unit. In some embodiments, the sorbents may be contained in removable inserts.