An energy recovery ventilator includes first and second blowers, a pressure transducer and a controller. The first blower is configured to direct a first air stream into a first zone of an enclosure. A second blower configured to direct a second air stream into a second zone of the enclosure. A pressure transducer is configured to determine internal air pressure within the enclosure. A controller is configured to control the first blower and/or the second blower in response to the internal air pressure.

A thermostat and related methods is provided for controlling an HVAC system having one or two separate transformers for supplying power to the HVAC system. The thermostat includes isolation circuitry housed within the thermostat to safely connect to the HVAC control wires and power wire(s) whether the HVAC system has one or two separate transformers without the use of removable jumpers or manual rewiring. The thermostat can include a processor that sends DC signals for turning on and turning off each of the HVAC functions, and an isolator adapted to electrically isolate the processor from the control wires and power wire(s). The isolator can include a transformer, such as a low cost Ethernet transformer. The circuitry can include one or more field effect transistors adapted and arranged so as to open or close an electrical connections between the control and power wires, thereby turning on or off the associated HVAC function. According to some embodiments, the Rc and Rh terminals are permanently connected using a fuse.

A thermostat for a building space includes an electronic display, a frame, a touch sensitive interface, and a processing circuit. The touch-sensitive interface has a first portion that overlays the electronic display and a second portion that overlays the frame. The touch-sensitive interface is configured to receive touch-based input via both the first portion and the second portion. The processing circuit is configured to define one or more locations within the second portion that correspond to touch-sensitive buttons. The locations of the touch-sensitive buttons are customizable and can be changed by a user. The thermostat further including at least one of a sticker and a skin that covers at least part of the second portion and visually marks the locations of the touch-sensitive buttons.

A 6-way valve (20) comprises two similar 3-way sub-valves (20a, 20b) being mechanically coupled with each other, such that both sub-valves (20a, 20b) are always in the same position, whereby each sub-valve (20a, 20b) has three different valve ports (33, 34, 35) and a valve member (22) with an internal connecting channel (29), which valve member (22) can moved between first and second end positions via an intermediate position such that in said first end position the first (33) and third (35) valve ports are connected with each other by means of said connecting channel (29), in said second end position the second (34) and third (35) valve ports are connected with each other by means of said connecting channel (29), and in said intermediate position said connecting channel (29) is disconnected from said first and second valve ports (33, 34).

A simple and effective volume/pressure relief means (28) is provided at one of said valve members (22), which volume/pressure relief means (28) establishes a hydraulic relief connection between said first or second valve port (33, 34) and said third valve port (35) of the respective sub-valve (20a or 20b), when said sub-valves (20a, 20b) are in said intermediate position, and is inactive, when said sub-valves (20a, 20b) are in the first or second end positions.

A measurement device includes: a casing that includes a first air duct with an air inlet; a straightening grid; a first chamber; an opening plate including an opening; a second chamber; pressure sensors configured to measure a first pressure, a second pressure, and a third pressure, the first pressure being air pressure from the air inlet to the straightening grid, the second pressure being air pressure in the first chamber, the third pressure being air pressure in the second chamber; a specific opening configured to allow the opening plate to be replaceable; an open/close portion configured to open and close the specific opening; and a duct forming a second air duct between the measurement device and a measurement target.

Disclosed are exemplary embodiments of climate control system controllers and methods for staging controller functions. In an exemplary embodiment, a climate control system controller generally includes power stealing circuitry, charge storage device(s) for storing charge provided by the power stealing circuitry and for providing power for controller functions, and a processor. For each controller function, the processor predefines a maximum wait time corresponding to the controller function. Before performance of one of the controller functions, the processor compares at least once the current level of charge on the charge storage device(s) to a predefined voltage level. Based on the comparing, the processor delays performance of the controller function until the corresponding predefined maximum wait time has passed and/or the current level of charge on the charge storage device(s) has reached the predefined voltage level.

A HVAC unit manufacturing method and a HVAC system are disclosed herein. In one embodiment, the HVAC system includes: a controller having control board terminals, a parallel wiring harness having a first and a second connection header, the first connection header coupled to the control board terminals, and a switch having terminals. The terminals of the switch including: a pair of functional terminals configured to indicate a status of the switch and a pair of jumpered terminals independent of the pair of functional terminals and internally connected together within the switch, wherein designated combinations of the terminals indicate a circuit configuration for employing the switch in the HVAC system with each of the terminals having a particular design that dictates a specific corresponding connection header be used for each of the designated combinations, wherein a single one of the designated combinations of the terminals corresponds to the second connection header.

An air conditioning apparatus includes a control device that controls a swing action of flaps of an air conditioning apparatus. The flaps are swung up and down. The control device includes an operation mode determining section, a swing pattern storage area and a control command generator. The operation mode determining section determines at least an air-cooling operation mode and an air-warming operation mode that are operation modes of the air conditioning apparatus. The swing pattern storage area stores a plurality of swing patterns that include information pertaining to the swing action. The control command generator generates a control command of the air conditioning apparatus on the basis of a swing pattern corresponding to the mode determined by the operation mode determining section from among the plurality of swing patterns.

In a system and method of controlling particulate count in a clean room having a number of compartments/zones in series, in response to a first level of energy consumption by speed adjustable fans supplying a first volume of air per unit of time to the clean room, differential air pressures are established in the clean room compartment/zone-by-compartment/zone in series from a first compartment/zone which has a requirement for the highest air pressure to a last compartment/zone which has a requirement for the lowest air pressure. In response to a second level of energy consumption by the speed adjustable fans supplying a second volume of air per unit of time to the clean room, the same differential air pressures are substantially maintained in the clean room.

The present disclosure simplifies the H-bridge circuit of the direct current motor for driving the damper (door) that switches the air passages in the indoor unit of an air conditioning device. The control device for an air conditioner that takes in inside or outside air and conditions the air inside an air conditioning unit using an evaporator and a heater core is provided with: a first actuator and a second actuator that drive the multiple dampers installed inside the air conditioning unit for switching the air passages; and three half-bridge circuits that control the first actuator and the second actuator sharing one of the half-bridge circuits. Of the multiple dampers, the first actuator is connected to the inside/outside air switching damper. Of the multiple dampers, the second actuator is connected to at least one air mix damper.