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.

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 method for use with an underground network that includes a plurality of locations. The method includes receiving sensor data from at least one sensor located at a first of the plurality of locations and determining the sensor data indicates that a fire is in progress. The method includes identifying one or more of the locations as one or more potential combustion locations and assigning an estimate of a probability to each of the potential combustion location(s). The estimate estimates a likelihood that the potential combustion location is an actual combustion source. The method may include displaying the estimate of the probability assigned to each of the one or more potential combustion locations.

Systems and methods for the delivery of fluidic substances in an HVAC system are provided herein. Described herein are various examples of a prisoner cell fluidic substance delivery system. The delivery system installs on an HVAC duct servicing one or more cells. The delivery system includes a removable hatch that allows personnel to access the interior of the HVAC duct. The hatch and its access into the interior of the HVAC duct may be sized to allow for the ability of personnel to clear any debris or other foreign material from the interior prior to the insertion of a fluidic substance, such as tear gas or pepper spray. The various examples described herein allow the introduction of substances to a single cell or a limited number of cells without the need to generally disperse the substance.

Disclosed herein are methods, systems, and devices for allowing access for maintenance and servicing of environmental control systems of prefabricated equipment enclosures. In one embodiment, an enclosure includes a first wall, a first environmental control unit, and a first door. The first door is mechanically coupled with the first environmental control unit and the first wall. The first door is configured to have a first closed position allowing in-service operation of the first environmental control unit for an internal space of the enclosure.

An exhaust vent assembly with selectively removable top wall that includes an exhaust vent body with a base wall, two opposing sidewalls, a rear wall, and the top wall that is capable of being removed from the sidewalls to provide access to the inside (or vent channel) of the exhaust vent assembly. The top wall is capable of having a closed position with the top wall secured and covering the upper edges of the two opposing sidewalls and with a mesh screen coupled to the exhaust vent body that is capable of preventing animals, certain insects, and other matter from entering the vent channel. The top wall is configured to have an open position with the top wall substantially uncovering the upper edges of the two opposing sidewalls and providing access to the vent channel.

A magnetic duct access door provides for frequent access to a variety of different kinds of duct. The access door allows for an efficient magnetic attraction to a metallic duct and easy manual removal of the access door by tilting the access door via handles on its front surface. The access door includes: an access door base; a plurality of magnets arranged around the periphery of the back surface of the access door base; a compressible sealing member located between the magnetic attachment pads on the back surface of the access door base; at least one handle portion extending from the front surface of the access door base.

An access device configured to be installed in an air conditioning (AC) system or network. The access device includes a main body and a lid configured to threadedly engage the main body. A hollow cylindrical extension extends between a proximal end and a distal end, thereby establishing a passage through the main body. The access device can be secured to a wall in an AC system with the cylindrical extension passing through a hole in the wall. The access device further includes a flange extending outwardly in a lateral direction relative to the central longitudinal axis. Some embodiments include a plurality of anti-rotation teeth attached to the flange. Some embodiments include an insulation support extending inwardly from the cylindrical extension to temporarily support insulation within the cylindrical extension between the lid and the insulation support.

A system for circulating air inside a manhole vault. The system includes an air-moving device in fluid communication with the manhole vault and configured to circulate the air inside the manhole vault to prevent a concentration of combustible gasses or to enhance cooling therein.

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.