Honeywell International Inc.

Michael Asmussen

Philipp Anton Roosli

Brendan H Donecker

Michael D Sobanko

Gregory W Howard

A system or arrangement of room control with a mobile device by a guest at a hotel, motel, or the like. When a reservation system assigns a guest to a room in, for instance a hotel, the reservation system may request a security certificate from a server that manages a control system in the room. The certificate may be transmitted to the guestroom control equipment and room reservation system. The certificate may be pushed to a mobile device of the guest. Also a key credential may be pushed to the mobile device for room access. The certificate may indicate the date/time period where the certificate is valid and functional aspects that the certificate can support relative to the room. When a guest goes to the room, the mobile device may link up with the control equipment in the room. Both entities having the same certificate can mutually authenticate each other.

Revocable certificates for guestroom access and guestroom controls by mobile devices

Methods, devices, and systems for assessing performance of a heating, ventilation, and air conditioning (HVAC) system are described herein. One method includes counting a number of interactions with an HVAC system associated with a multi-dwelling unit during a defined period of time, and assessing a performance of the HVAC system based on the number of interactions.

Assessing performance of an HVAC system

An observed space having energy consuming devices with conservation mechanisms, algorithms, techniques, or applications. The devices having their conservation applications engaged may be a normal mode. When the conservation applications are disengaged, the devices may be in a reference mode. An amount of energy consumption by the devices in the normal mode may be compared with an amount of energy consumption by the devices in the reference mode to determine an energy conservation effectiveness of the devices in the observed space.

System for measuring energy conservation effectiveness

Methods, devices, and systems for synchronizing switching times of relays to a zero-crossing are described herein. One device includes a memory, and a processor configured to execute executable instructions stored in the memory to receive phase information of an alternating-current (AC) electric mains, determine, from the phase information, a zero-crossing of the phase of the AC electric mains, determine a reference time based on the zero-crossing for a number of relays corresponding to a number of relay controllers, and transmit the reference time to the number of relay controllers.

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New London, CT, United States of America

Michael Asmussen