A transportable system for generating aqueous ozone solution includes a wheeled frame and an aqueous ozone solution supply unit that is coupled to the wheeled frame. The aqueous ozone solution supply unit is configured to produce an aqueous ozone solution onsite by generating and injecting ozone into water received from an onsite water source. The transportable system further includes an outer enclosure configured to surround at least a portion of the wheeled frame and configured to contain the aqueous ozone solution supply unit. The outer enclosure is also configured to store one or more external components for the aqueous ozone solution supply unit and one or more cleaning accessories when the aqueous ozone solution supply unit is being transported via the wheeled frame.

Systems and methods for circulating air in an enclosed environment are disclosed. In some embodiments, the system includes an inlet to receive air from outside of the enclosed environment and an air handling unit coupled to the inlet and also configured to receive circulated air from the enclosed environment. The air handling unit can be configured to affect a temperature of at least one of the received outside air and the received circulated air. Based on the received outside air and the received circulated air, the air handling unit can be further configured to generate air for supplying to the enclosed environment.

Systems and methods for circulating air in an enclosed environment are disclosed. In some embodiments, the system includes an inlet to receive air from outside of the enclosed environment and an air handling unit coupled to the inlet and also configured to receive circulated air from the enclosed environment. The air handling unit can be configured to affect a temperature of at least one of the received outside air and the received circulated air. Based on the received outside air and the received circulated air, the air handling unit can be further configured to generate air for supplying to the enclosed environment.

An HVAC system for a multi-unit building having a riser stack in flow communication with a single unit HVAC system. The single unit HVAC system has a first heat exchanger thermally connected to the riser stack, a second heat exchanger thermally connected to a fluid distribution system within the unit, and a closed loop fluid flow path extending between the first and second heat exchangers. The first heat exchanger exchanges heat between a riser stack fluid in the riser stack and the closed loop fluid in the closed loop fluid flow path and the second heat exchanger exchanges heat between the closed loop fluid and a distribution fluid of the fluid distribution system.

The present invention discloses an intelligent household air purification cabinet type body-building apparatus, comprising a box body, a running machine, an air purifier and a power supply. The intelligent household air purification cabinet type body-building apparatus is further provided with an intelligent control system which comprises a controller, a central control computer, a pressure frequency detection device, an audio device, a display device and a signal receiving and transmitting device. A use method of the body-building apparatus comprises five steps of facility unfolding and need setting, environment preparation, body-building process, statistical analysis of body-building completion, and folding. The present invention has the advantages of small occupation space, complementary functions, no need of adding a power supply, supply of body-building environment beneficial to a human body, convenient operation and capability of long-term sustainable improvement.

A ventilation system includes a line system which is designed to guide an air stream and to provide the air stream during normal operation via an outlet of the line system for supplying a space. The ventilation system includes a generating unit which is designed to produce reactive oxygen species during a cleaning operation and to feed the same to the air stream conducted in the line system. Also disclosed are methods for operating such a ventilation system and a generating unit for such a ventilation system.

A system for generating an aqueous ozone solution employs a mixing assembly disposed within an auxiliary compartment coupled to an external sidewall of an ozone supply unit enclosure. The mixing assembly includes a first flow path for water to flow through and a second flow path in parallel with the first flow path. The first flow path includes one or more ozone intake ports that are fluidically coupled to one or more ozone output ports of the ozone supply unit enclosure. The second flow path includes a control valve that selectively permits a portion of the water to flow through the second flow path to produce a negative pressure in the first flow path so that ozone is drawn into the first flow path through the one or more ozone intake ports and mixed into the water flowing through the first flow path to produce an aqueous ozone solution.

The invention relates to a method and to an apparatus for separating and utilizing carbon dioxide. According to the invention, carbon dioxide (3a, 3b) is separated from air (1a) being conducted to a building and/or from air (1c,1d) being circulated in the building to reduce the level of carbon dioxide in indoor air (1b) of the building (4), the carbon dioxide (3a, 3b) is recovered, and the carbon dioxide is conducted to a carbon dioxide treatment stage (5), where a chemical compound (6) is formed from the carbon dioxide. In addition, the invention relates to the use of the method.

A room 100 in a building has a living etc. space 101 of volume V that is an enclosed space. Ventilation of an air flow F is performed from the outside to the living etc. space 101. Entering/exiting of air as an air current between the inside of the living etc. space 101 and the outside is eliminated, and at least a part of the boundary between the living etc. space 101 and the outside is configured from a gas exchange membrane 310 having a diffusion constant D, a thickness L, and an area A for gas molecules of interest. When air inside the living etc. space 101 is sufficiently agitated and the concentration of gas molecules constituting the air is made spatially uniform, η(t) is controlled so as to vary according to $\begin{array}{cc}\eta \left(t\right)={\eta }_o-\frac{\mathrm{BL}}{\mathrm{AD}}\left(1-\exp \left(-\left[\mathrm{AD}\text{/}L\right]t\text{/}V\right)\right)& \left(9\right)\end{array}$

An HVAC system having a fan coil and an oxygen concentrator.