Abstract: An air conditioning device with VPD control for indoor residential cannabis cultivation is provided. The air conditioning device with VPD control includes: a control module with a processing unit, a display screen and an IO interface; a cooling unit for providing cold air in response to a cooling unit control signal from the control module; a fan for circulating cold air in response to a fan control signal from the control module; and a temperature-humidity sensor for sensing an environmental temperature value T and an environmental relative humidity value RH within an indoor cannabis cultivation environment, the environmental temperature value TENV and the environmental relative humidity value RHENV are transmitted to the control module in real time, and a leaf VPD value VPDLEAF is calculated from the environmental temperature value TENV and the environmental relative humidity value RHENV by the processing unit of the control module.

Abstract: A Heating, Ventilation, and Air Conditioning (HVAC) system. The HVAC system includes a plurality of intake vent assemblies configured for a first zone of a plurality of zones; a plurality of exhaust vent assemblies configured for the first zone of the plurality of zones; and a control module, the control module configured to control a heating mode, a ventilation mode, a dehumidification mode, and a cooling mode. For each of the heating, ventilation, dehumidification, and cooling modes, air is pulled from at least one of the plurality of zones into the HVAC system through at least one of the plurality of intake vent assemblies and conditioned by the HVAC system, and the air is supplied to the first zone through at least one of the plurality of exhaust vent assembly.

Abstract: A portable heater including an intake module configured to draw air into the heater; a heating module coupled to the intake module and configured to heat the air drawn into the heater; and an exhaust module coupled to the heating module and configured to exhaust the heated air. The intake module is further configured to draw air into the heater from locations other than a first region where the heater is located.