Laboratory ventilation is integrated. The HVAC room controller requests changes in the exhaust set point of one or more fume hoods. By allowing the fume hoods to respond to such HVAC requests, the fume hood exhaust may be turned down to a point below the highest level that could be needed. The request may be used to turn the fume hood exhaust back up, so greater energy savings may be possible in non-peak demand operation of the HVAC system.

According to certain embodiments, a system comprises a controller and an HVAC system with components comprising an evaporator unit comprising an evaporator coil, an indoor fan, and a discharge air duct and a condenser unit comprising a compressor, a condenser coil, and an outdoor fan. The system is configured to determine that a first or a second level of evaporator coil freeze risk is present and to communicate an instruction to the HVAC system with a first or a second action to counteract the freeze risk. For example, in certain embodiments, the actions comprise changing the indoor fan speed, changing the compressor speed, and changing the outdoor fan speed.

A vapor management system includes a monitoring service system configured to communicate one or more system parameters with at least one vapor mitigation system. The monitoring service system is further configured to generate a user interface. The user interface is configured to display and permit adjustment of the one or more system parameters.

A vapor management system includes a monitoring service system configured to communicate one or more system parameters with at least one vapor mitigation system. The monitoring service system is further configured to generate a user interface. The user interface is configured to display and permit adjustment of the one or more system parameters.

An air-conditioning control system configured to control air conditioning in a building that includes an air-conditioning room in which an air conditioner is provided and a first air-inflow room into which air flows from the air-conditioning room. The air-conditioning control system includes: a temperature obtaining unit configured to obtain a temperature of the first air-inflow room; and a controller configured to control the air conditioner, based on the temperature obtained by the temperature obtaining unit.

A vapor management system includes a monitoring service system configured to communicate one or more system parameters with at least one vapor mitigation system. The monitoring service system is further configured to generate a user interface. The user interface is configured to display and permit adjustment of the one or more system parameters.

A system and method for sampling air at multiple locations in a controlled environment. The system and method includes automatic adjustment of mass flow rates and duration of vacuum connections (either via time elapsed or indirectly by volume) based on rates set by an operator. Additionally, the system and method enables users to monitor and control aspects of the system via network-connected devices. Additionally, the system enable a vacuum pump to be disconnected from power in response to a physical emergency button, a software-based emergency stop button available on network connected devices, and an automatic power disconnection in response to an abnormal mass flow reading that could potentially impact the vacuum pump.

According to certain embodiments, a system comprises a controller and an HVAC system with components comprising an evaporator unit comprising an evaporator coil, an indoor fan, and a discharge air duct and a condenser unit comprising a compressor, a condenser coil, and an outdoor fan. The system is configured to determine that a first or a second level of evaporator coil freeze risk is present and to communicate an instruction to the HVAC system with a first or a second action to counteract the freeze risk. For example, in certain embodiments, the actions comprise changing the indoor fan speed, changing the compressor speed, and changing the outdoor fan speed.

The extraction room and ventilation system comprises an extraction room involving opposing supply and exhaust systems that provide a laminar type air flow configured to transmit fresh air flow to said extraction room at a rate of more than 1000 cubic feet per minute at a static pressure of more than 0.5 inch water. The extraction room is configured to use intrinsically safe or Class 1 Division 1, group D electrical appliances; a flammable gas detector, with an alarm and automatic ventilation system connected to said flammable gas detector; and be constructed in accordance with the International Fire Code & International Building Code definition for a One Hour Fire Rated Room construction. In another embodiment the ventilation system may be prefabricated or installed in a standardized movable unit such as a trailer or shipping container.

A ventilation system includes: a supply air flow path that is a flow path connecting outdoors to an indoor space; an exhaust flow path that is a flow path connecting the indoor space to the outdoors; an air supply blower that generates a flow of air to be supplied to the indoor space, the air supply blower being provided on the supply air flow path; an exhaust blower that generates a flow of air to be exhausted to the outdoors, the exhaust blower being provided on the exhaust flow path; and a control device that controls operation of the air supply blower and the exhaust blower. When a dehumidifying mode is selected which is a mode for dehumidifying the indoor space, the control device puts the indoor space under negative pressure by controlling at least one of the air supply blower and the exhaust blower.