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Acronym for Electrically Erasable Programmable Read-Only Memory. There are a limited number of write actions to EEPROM for a given controller.


Energy Audit

A systemized approach to measuring, recording, and evaluating the operating performance of a building system with the intention of improving the performance.

ExamplesASHRAE's Guide for Commercial Building Energy Analysis.


Energy Codes

Click to Launch Building Energy Code Tool [flash]Building codes are a set of rules that specify the minimum acceptable level of safety for constructed objects such as buildings and structures. The main purpose of the building codes is to protect public health, safety and general welfare as they relate to the construction and occupancy of buildings and structures.


Building codes are generally intended to be applied by architects and engineers, but are also used for various purposes by safety inspectors,, commercial developers, contractors and subcontractors, manufacturers of building products and materials, insurance companies, facility managers, tenants, etc...


Launch the Building Energy Code Finder (by state)

Launch the Building Energy Code Finder (by state)


Energy Cost Budget

(as relates to ASHRAE/IESNA 90.1 and LEED) Energy Cost Budget refers to the baseline case of the project as defined by a standard such asASHRAE 90.1.  The energy cost budget establishes the energy efficiency target for the building.  It is the estimated annual energy cost for the budget building design.  The energy cost budget is compared to the design energy cost which may not exceed the budget.  The design energy cost and the energy cost budget are calulated as separate runs by an approved simulation program using the rules spelled out in a standard such as 90.1.  The comarison is used to establish LEED credit for optimizing energy performance in the Energy and Atmosphere Catagory in the LEED Rating System. (reference: LEED-NC 2.1 reference guide and ASHRAE 90.1 User's Manual)


Developed by EnOcean GmbH (a spin-off company of Siemens AG)


Based around energy scavenging technology that enables a wireless community of battery-free sensors to connect to transceivers that are powered for continuous operation. Therefore it can be used for wireless mesh networking (nonstandard mesh protocol).


Protocol description
• Packets of data are transmitted at 120 kbit/s with the packet being 14 bytes long with a four byte data payload. RF energy is only transmitted for the 1's on the data, reducing the amount of power required. Three packets are sent at pseudo-random intervals reducing the possibility of packet collisions. Push switches also transmit a further three data packets on release of the switch push-button, enabling other features such as light dimming to be implemented.


• Building Automation and Control



A family of frame-based computer networking technologies for high-speed local area networks (LAN) that operate over a variety of media.