Setup ENERGY STAR
For each ENERGY STAR "enabled" building, you need at least 12 months of utility bills and certain "building attributes" such as number of occupants and hours of operation. The required building attributes vary, depending upon the building type.
To receive a basic, "best guess" ENERGY STAR rating, you only need to designate the building type, its floor area and the ZIP code. The other building attributes will receive standard EPA default values. As time permits, collect and enter all building attributes to get a true and accurate ENERGY STAR rating.
Setting up ENERGY STAR:
- In the Buildings & Meters tree, highlight the desired building.
- At the bottom of the Buildings & Meters tree, click the Edit (pencil) icon. The Building Properties dialog will open.
- Select the ENERGY STAR tab on the left.
- Check the box labeled "Enable automatic ENERGY STAR ratings"
- Select the Primary ENERGY STAR Building Type that corresponds to your building. There are fourteen building types eligible for ratings. If your building type is not shown, select "other." Although a building classified as "other" will not receive a 1-100 rating, it will still receive valuable energy metrics that are shown in the results table (the ENERGY STAR tab of the Buildings & Meters tree). Many buildings are mixed-use; select the primary type, i.e. the type that represents the greatest floor area.
- The "Zip code" and "Gross Floor Area" are automatically populated from the General and Floor Area tabs. *Note: If they are not present or need to be modified, please use the "General" and "Floor Area" tabs for this purpose.
- Enter or update all of the building attributes that you can. Official attribute instructions are available from EPA at: http://www.energystar.gov/ia/business/tools_resources/target_finder/help/Space_Use_Information.htm
- Click "Save".
ENERGY STAR Sub-Spaces
An ENERGY STAR rating is calculated against a U.S. Dept of Energy statistical model known as CBECS. The CBECS model takes certain building characteristics into account which are considered when coming up with the ENERGY STAR rating. For instance, a General Office building total square footage assumes both the actual office area AND other areas like lobbies, conference rooms, fitness areas, etc. When you say that the building has 10,000 sq/ft of space, all of these "sub-spaces" would be expected to be a part of that number. Likewise, a hospital will always have spaces used for storage, admin offices, medical offices, restaurant, etc. These are assumed to be present and do not constitute sub-spaces.
HOWEVER, if your electric meter also powers the lights in your parking lot, that's an additional "sub-space" that needs to be accounted for if you want the most accurate rating. ENERGY STAR provides a way to account for that. In UtilityManager you need to add an additional "sub-space" to account for this energy use.
- Select the building in the Buildings & Meters tree.
- Click the edit (pencil) icon at the bottom of the tree.
- Select the "ENERGY STAR" tab on the left
- Ensure that the "enable" box is checked and a primary place type has been selected. If not, follow the instructions above for setting up the primary ENERGY STAR space type.
- Select a sub-space from the menu and click the "Add Sub-Space" button.
- A new space tab will be added. Fill in as many building attributes as you can to correctly model this sub-space. Parking is the most common sub-space. 24/7 access is indicated as 168 hours/week. You may have fewer hours of access if the lot is closed and all power turned off during certain days. All areas are in square feet. Enclosed means a fully enclosed space (such as an underground structure) that requires 24/7 lighting and ventilation. Non-enclosed means a deck that has open sides, thereby requiring lighting but not mechanical ventilation. Open means a surface lot.
On the Include/Exclude tab, check those meters that you want to submit to ENERGY STAR, i.e. all meters that are relevant to the energy usage of the space(s). For example, a meter that serves exterior signage should be excluded. If a parking lot has a separate meter, exclude the meter and do NOT create a parking sub-space.