A system for use with a manhole vault having an internal atmosphere, and, optionally, with a ventilation stack connecting the vault to an external atmosphere. The system includes a manhole cover, a ventilation pipe, and an air moving assembly. The cover has one or more through-holes extending between top and bottom surfaces. Each of the through-hole(s) is in fluid communication with the external atmosphere at the top surface. The pipe has a through-channel that extends between first and second openings. The first opening is positioned proximal to either an opening into the ventilation stack or at least one of the through-hole(s) at the bottom surface of the cover. The second opening is positioned in the interior of the vault. The device is configured to cause a portion of one of the interior and external atmospheres to flow through the through-channel toward a different one of the interior and external atmospheres.

A latch assembly for a heating, ventilation, and/or air conditioning (HVAC) enclosure includes a latch having a securement portion configured to couple to an access panel of the enclosure and having a rotational portion. The rotational portion has an engagement feature configured to engage with a tool face or a tool receptacle and the rotational portion has a first retainer adjacent to the engagement feature. The rotational portion is configured to rotate relative to the securement portion such that a locking portion of the rotational portion transitions between a closed configuration and an open configuration. The latch assembly includes a handle accessory having a handle engagement driver configured to engage with the engagement feature of the rotational portion along a first linking axis and having a second retainer configured to couple with the first retainer of the rotational portion along a second linking axis, transverse to the first linking axis.

A hinge assembly includes a pair of lower mounting brackets, at least two upper hinge leaves, a pair of side brackets coupled to the sidewalls of the ventilation fan lid, each side bracket having at least one third axle hole therethrough, an axle pivotally coupling the upper hinge leaves to the lower mounting brackets. Each lower mounting bracket has a vertically oval-shaped axle hole. Each upper hinge leaf includes a U-shaped mounting member and a hook shaped clamping plate coupled to the U-shaped mounting member through threaded tension bolts. The upper hinge leaf also has a pair of axle holes. The axle extends through the elongated axle holes of the lower mounting bracket vertical flange and through the axle holes of the U-shaped member.

An air conditioner unit includes a housing defining an outdoor portion and an indoor portion. An outdoor heat exchanger assembly is disposed in the outdoor portion and an indoor heat exchanger assembly is disposed in the indoor portion. The air conditioner unit also includes a compressor in fluid communication with the outdoor heat exchanger assembly and the indoor heat exchanger assembly to circulate a refrigerant therebetween. The air conditioner unit further includes a plenum attached to the housing. The plenum is receivable within a wall channel defined by a structure wall along an axial direction. The air conditioner unit also includes a make-up air duct extending between the plenum and the indoor portion of the housing with a bracket fixed in place within the make-up air duct and a make-up air component slidably received in the bracket. The make-up air component is slidably removable from the bracket.

A system including a processor and sensor for installation inside an underground vault. The sensor monitors a parameter inside the vault and sends a monitoring signal to the processor. Based on the monitoring signal, the processor may provide data to a memory for storage and/or control signals to an interface for transmission to an external device located within the vault. The control signals instruct the external device to modify the environment inside the vault. The sensor may be positioned inside an enclosure, which is inside a housing. An air moving device moves air into or out of the enclosure thereby drawing air from the vault into the enclosure before the sensor monitors the parameter. A heat generating component may be positioned inside the housing and when generating heat prevents moisture from condensing therein. The system may include a power unit that draws power from a power source inside the vault.

A system including a processor and sensor for installation inside an underground vault. The sensor monitors a parameter inside the vault and sends a monitoring signal to the processor. Based on the monitoring signal, the processor may provide data to a memory for storage and/or control signals to an interface for transmission to an external device located within the vault. The control signals instruct the external device to modify the environment inside the vault. The sensor may be positioned inside an enclosure, which is inside a housing. An air moving device moves air into or out of the enclosure thereby drawing air from the vault into the enclosure before the sensor monitors the parameter. A heat generating component may be positioned inside the housing and when generating heat prevents moisture from condensing therein. The system may include a power unit that draws power from a power source inside the vault.

Aspects of the present disclosure include a primary air chamber configured to receive primary air, an induced air chamber configured to receive secondary air, a heating coil disposed in the induced air chamber, wherein the heating coil is removable from the induced air chamber without disassembling at least a portion of the induced air chamber, and the heating coil does not receive the primary air, a fan disposed in the induced air chamber, wherein the fan is configured to blow the secondary air received via the induced air chamber toward the heating coil and the heating coil heats the secondary air.

A system and method for ventilating a utility structure enclosed by a vented cover is provided. The system includes at least one air movement device coupled to the cover. A first induction loop is electrically coupled to the at least one air movement device, the first induction loop being coupled to the cover. A second induction loop is disposed in the utility structure, the second induction loop being inductively coupled to the first induction loop. A gas sensor is operably coupled to the second induction loop to direct electrical power to the second induction loop in response to a gas level being equal to or exceeding a predetermined threshold.

To suppress inflow of external air through a rack insertion opening while a sample rack is pulled out. An apparatus includes a housing, a temperature control space, and an air temperature control part. The housing has the rack insertion opening on one side surface for putting in and taking out the sample rack. The air temperature control part has an air intake portion for intake of air in the temperature control space, a fan for blowing air taken in from the air intake portion toward the sample rack accommodated in the temperature control space, and a cooling element provided to cool the air on a path of air taken in from the air intake portion. The air temperature control part is configured to reduce an amount of air flowing near the rack insertion opening while the sample rack is pulled out from the temperature control space as compared to while the sample rack is accommodated in the temperature control space, so as to suppress inflow of air through the rack insertion opening.

An access panel assembly and a heating, ventilation, and/or air conditioning (HVAC) system incorporating the access panel assembly are provided. The HVAC system includes a heat exchanger assembly with a first heat exchanger coil and a second heat exchanger coil (e.g., in a V-shaped configuration). The first heat exchanger coil and the second heat exchanger coil each respectively include an exterior surface, an interior surface, a first edge, and a second edge. The access panel assembly is adjacent to the first edge of the first heat exchanger coil and the first edge of the second heat exchanger coil. The access panel assembly is configured to provide access (e.g., for cleaning and/or maintenance) to at least one of: the interior surface of the first heat exchanger coil and the interior surface of the second heat exchanger coil.