An apparatus and method to selectively create a heat transfer effect and sensation of cooling within bedding on a mattress. A programmable application is accessible on a wireless network and is programmed to provide appropriate settings to attain changes over time of a space within bedding that pertain to at least one of heating the space and realizing a cooling sensation within the space. A wireless receiver is configured to receive commands in a wireless manner that are indicative of the appropriate settings provided by the programmable application to effect changes over time of the space within the bedding attributed to heat transfer with respect to the at least one of heating the space and realizing a cooling sensation within the space. The heat transfer occurs as a result of fluid flow either within a mattress or within space in bedding over the mattress.

An air filter for a heating, ventilation and air conditioning, HVAC, system, the air filter comprising: a housing having an inlet opening and an outlet opening, configured for air to flow along an air flow route between the inlet opening and the outlet opening; a supply spool and a take-up spool mounted to the housing on opposite sides of the air flow route; one or more filter guides mounted to the housing between the supply spool and the take-up spool; a strip of filter medium extending from the supply spool to the take-up spool via the one or more filter guides, with a portion of the filter medium extending across the air flow route; and a driver arranged to advance the filter medium to change the portion of the filter medium extending across the airflow route. Air filtration systems, HVAC devices and HVAC systems comprising the air filter.

An air filter for a heating, ventilation and air conditioning, HVAC, system, the air filter comprising: a housing having an inlet opening and an outlet opening, configured for air to flow along an air flow route between the inlet opening and the outlet opening; a supply spool and a take-up spool mounted to the housing on opposite sides of the air flow route; one or more filter guides mounted to the housing between the supply spool and the take-up spool; a strip of filter medium extending from the supply spool to the take-up spool via the one or more filter guides, with a portion of the filter medium extending across the air flow route; and a driver arranged to advance the filter medium to change the portion of the filter medium extending across the airflow route. Air filtration systems, HVAC devices and HVAC systems comprising the air filter.

The present invention relates to a blower, the blower according to an embodiment of the present invention comprising: a lower case having a suction hole formed therein through which air is introduced; an upper case arranged on the upper side of the lower case and having a discharge hole formed therein through which air is discharged; and a fan arranged in the lower case and including a plurality of blades. Each of the plurality of blades includes a plurality of airfoils respectively extending along different camber lines from one another, and a leading edge of connecting the leading ends of the plurality of airfoils. Entrance angles formed by the respective camber lines of the plurality of airfoils and the rotation directions of the blades are different from one another. Thus, due to the curved shape of the leading edge and the design of a recessed notch, a flow separating from the leading edge is reduced, and thus, there is an advantage in that air volume performance is improved.

A roof vent has a vent base and a cover. The vent base has an annular main body that extends from an inner perimeter to an outer perimeter. An inside baffle extends upwardly from the vent base. The cover is mounted to cover the opening and the inside baffle, and includes an outside baffle that extends downwardly from the cover, spaced a distance from the inside baffle to form a filter receiving space. A skirt extends downwardly from an edge of the cover towards the vent base. A plurality of upper pegs and a plurality of lower pegs extend downwardly into the filter receiving space. A filter is positioned in the filter receiving space, where it is penetrated by and held in place by the upper and lower pegs.

A roof vent has a vent base and a cover. The vent base has an annular main body that extends from an inner perimeter to an outer perimeter. An inside baffle extends upwardly from the vent base. The cover is mounted to cover the opening and the inside baffle, and includes an outside baffle that extends downwardly from the cover, spaced a distance from the inside baffle to form a filter receiving space. A skirt extends downwardly from an edge of the cover towards the vent base. A plurality of upper pegs and a plurality of lower pegs extend downwardly into the filter receiving space. A filter is positioned in the filter receiving space, where it is penetrated by and held in place by the upper and lower pegs.

An air duct device and an air handling apparatus are provided. The air duct device can include a housing, a first air duct, and a second air duct. The first air duct is arranged in the housing and has an air input end and an air output end. The second air duct is arranged in the housing and has an air input end and an air output end. The air input end of the second air duct passes by the air output end of the first air duct.

An air duct device and an air handling apparatus are provided. The air duct device can include a housing, a first air duct, and a second air duct. The first air duct is arranged in the housing and has an air input end and an air output end. The second air duct is arranged in the housing and has an air input end and an air output end. The air input end of the second air duct passes by the air output end of the first air duct.

A method and apparatus for filter testing for use within an air handling system. The air handling system may include one or more scan assemblies. The scan assembly may include a track system using one or more magnetic arrays.

A heating, ventilation, and/or air conditioning (HVAC) system includes an air handling unit configured to condition an outdoor air flow to generate a ventilation air flow. The HVAC system includes a terminal unit fluidly coupled to the air handling unit. The terminal unit includes a plenum configured to receive the ventilation air flow and a blower configured to draw a return air flow from a space serviced by the HVAC system across a heat exchanger of the terminal unit and into the plenum to condition the return air flow. The blower is configured to mix the ventilation air flow and the return air flow to generate a supply air flow. A displacement ventilation (DV) diffuser is configured to receive the supply air flow. The DV diffuser is configured to direct the supply air flow through a filter of the DV diffuser and into the space.