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How do you calculate Eui?
EUI is expressed as energy per square foot or meter per year. It is calculated by dividing the total energy consumed by the building in one year by the total gross floor area of the building. EUI is expressed as thousands of British thermal units used per square foot per year (kBtu/sq.
What is a good EUI rating?
Hospitals have EUIs that can range from 400 to 500 kBTU/sf/year, due the high energy demand of interior lighting and hospital equipment. In contrast, a school may have an EUI in the range of 150 kBTU/sf/year. Food services facilities tend to have very high energy usage, and can have EUIs above 800 kBTU/sf/year.
How is energy cost index calculated?
Another common measurement is Energy Cost Index (ECI). To calculate ECI, take utility expenditures, in dollars, and divide by gross conditioned area, in square feet. As with EUI, ECI can be used to compare similar facilities. Keep in mind that energy costs vary by geographical region.
What is an EUI?
If energy usage information has been entered into Energy Star Portfolio Manager, the software will compute an Energy Usage Intensity (EUI) for each building, which is simply total energy usage divided by building square footage.
What is the unit of EUI?
EUI is measured by the total electricity used within a building in a year, expressed as kilowatt hour (kWh), per gross floor area (m²).
What is the EUI baseline?
EUI – which has been called “the miles per gallon rating of the building industry” – is conveyed as a function of the building’s size and expressed as energy used per square foot per year. In the energy efficiency design world, EUI is the starting point in determining both baseline and target energy efficiency goals.
What is the average EUI of a home?
Energy intensive homes and buildings might have an EUI between 100 and 200 kBtu/sf/yr, while high performance homes and buildings might have an EUI of 25 kBtu/sf/yr or less. The Passive House standard requires less than 14.6 kBtu/sf/yr.
What is Eui 48?
EUI-48 and EUI-64 identifiers are most commonly used as globally unique network addresses (sometimes called MAC addresses), as specified in various standards. For example, an EUI- 48 is commonly used as the address of a hardware interface according to IEEE Std 802, historically using the name “MAC-48”.
What is source EUI?
Site EUI is the amount of heat and electricity a buildings consumes as reflected in utility bills. Source EUI traces heat and electricity use back to the original raw input creating a more holistic understanding of a building’s energy use.
How do you calculate the annual energy consumption of a building?
As every engineer knows, energy calculation is straightforward. The unit of electrical energy is the kilowatt-hour (kWh), found by multiplying the power use (in kilowatts, kW) by the number of hours during which the power is consumed. Multiply that value by the cost per kWh, and you have the total energy cost.
What are Eui 48 and EUI-64?
Extended Unique Identifiers An Extended Unique Identifier (EUI) is either a 48-bit Extended Unique Identifier (EUI-48) or a 64-bit Extended Unique Identifier (EUI-64).
What is the use of EUI-64?
EUI-64 (Extended Unique Identifier) is a method we can use to automatically configure IPv6 host addresses. An IPv6 device will use the MAC address of its interface to generate a unique 64-bit interface ID.
What is the difference between site EUI and source EUI?
There are two types of EUI: site and source. Site EUI is the amount of heat and electricity a buildings consumes as reflected in utility bills. Source EUI traces heat and electricity use back to the original raw input creating a more holistic understanding of a building’s energy use.