Data for Part L2

This tab deals with data describing the building’s heating systems for the purpose of Section 6.

This list-box displays a list of heating systems serving the building. Add to the list using the ‘Add’ button and remove a system by highlighting it and clicking on ‘Remove’. Highlight a system to display or edit its data in the boxes appearing beneath.

An editable description of the selected system.

The fuel supplying the heating system. Select a fuel from the list. This will affect the calculated carbon intensities.

If there is just one heating system, enter 100%. If there is more than one, enter the percentage of the total heat output to the building that is supplied by the selected system when the building heating load is at its maximum. (Note: heating systems are treated in terms of heat output for the Elemental and Heat Loss Methods, but in terms of heat input for the methods based on Carbon Performance Index.)

Enter the gross efficiency of the selected system (kWh of heat per kWh of delivered fuel) when the building heating load is at its maximum.

If there is just one heating system, enter 100%. If there is more than one, enter the percentage of the total heat output to the building that is supplied by the selected system when the building heating load is at 30% of its maximum.

Enter the gross efficiency of the selected system (kWh of heat per kWh of delivered fuel) when the building heating load is at 30% of its maximum.

Tick this box if the selected system is a combined heat and power (CHP) system.

If the system is a CHP system enter its heat to power ratio (kWh of useful heat produced per kWh of electricity output). This is equivalent to the ratio of the thermal and power efficiencies of the CHP unit.

Beneath this label are displayed the calculated and required carbon intensities of the combined heating systems working at their maximum heat output, together with a PASS or FAIL indicator for the Section 6 heating systems requirement at maximum output (Document J paragraph (J11.1)). To obtain a PASS, the calculated value must not exceed the required value.

Beneath this label are displayed the calculated and required carbon intensities of the combined heating systems working at 30% of their maximum heat output, together with a PASS or FAIL indicator for the Section 6 heating systems requirement at this level of output (Document J paragraph (J11.1)). To obtain a PASS, the calculated value must not exceed the required value.

This tab deals with systems providing mechanical ventilation only. The data is used to assess mechanical ventilation systems in offices by the method described in paragraphs (J13.1) and K2.1. A Carbon Performance Index (CPI) is calculated and compared with a required (target) value.

Tick this box if all or part of the building is served by such a system.

Tick this box if the proposed system is an alteration of an existing system. This will require a less stringent CPI value (paragraph (13.1)).

This sub-tab deal with systems serving the mechanically ventilated area. The following data must be entered:

The input rating for the fans, expressed per square metre of treated floor area. Treated floor area excludes plant rooms, service ducts, lift-wells etc.

A category describing the extent to which facilities for monitoring and reporting are provided. Select from the list.

Tick each plant maintenance feature that applies.

Or in the case of the Lighting tab, enter values specifying the percentage of the floor area benefiting from time-based lighting control, occupancy-based lighting control, daylight control or daylight availability.

At the bottom of the dialogue are displayed the calculated and required Carbon Performance Indices of the mechanical ventilation systems, together with a PASS or FAIL indicator for the ventilation systems requirement (paragraph K2.1). To obtain a PASS, the calculated value must equal or exceed the required value.

This tab deals with systems providing air conditioning. The data is used to assess air conditioning systems in offices by the method described in paragraphs (J13.1) and K2.2. A Carbon Performance Index (CPI) is calculated and compared with a required (target) value.

If both new air conditioning and mechanical ventilation systems are to be installed in a building, the system types and their treated areas should be dealt with separately and the appropriate CPR achieved for each.

Tick this box if all or part of the building is served by such a system.

Tick this box if the proposed system is an alteration of an existing system. This will require a less stringent CPI value (paragraph (13.1)).

These sub-tabs deal with systems serving the air conditioned area.

Within each tab the following data must be entered:

The input rating for the equipment referred to, expressed per square metre of treated floor area. Treated floor area excludes plant rooms, service ducts, lift-wells etc.

A category describing the extent to which facilities for monitoring and reporting are provided. Select from the list.

Tick each plant maintenance feature that applies.

Or in the case of the Lighting tab, enter values specifying the percentage of the floor area benefiting from time-based lighting control, occupancy-based lighting control, daylight control or daylight availability.

At the bottom of the dialogue are displayed the calculated and required Carbon Performance Indices of the air conditioning system, together with a PASS or FAIL indicator for the air-conditioning systems requirement (paragraph K2.1).). To obtain a PASS, the calculated value must equal or exceed the required value.

Click this button to access the user database of building regulations Building and System Data.

The database presents a list of entries each containing a complete set of building regulations Building and System Data. Its purpose is to provide a facility for storing data settings for later reuse.

Changes to the database and the project data only take effect when the OK button is clicked on exit. You may abandon the database session using Cancel.

Click on a database entry to select it.

The area on the right of the dialogue headed Building & System Data displays the data in the selected entry and allows you to edit it.

Saves the contents of the selected database entry to the database. Should you omit to click this button following edits a message will prompt you to save the data.

Copies the contents of the selected database entry to the project.

Copies the Building and System Data from the project to the selected database entry.

Creates a new database entry. The data is initialised with the data in the currently selected entry.

Removes the selected entry from the database.

Allows renaming of the selected entry. You can also rename an entry by double-clicking on its name.

Exits the database and saves any changes.

Exits the database without saving.

Exits the Building and System Data interface and retains the changes made.

Exits the Building and System Data interface and discards the changes made (with the exception of any edits saved to the database).