## Draft Proposal E-8

This concept has been developed by the DOE Building Energy Codes Program (BECP) as a possible code
change proposal to the Commercial provisions of the 2012 International Existing Buildings Code (IEBC).

Interested parties are asked to submit any and all comments on DOE's initial concepts and draft code
change proposals. For instructions on submitting comments, visit:

www.energycodes.gov/deve lopment/iebc_concepts



## Demand Increase Requirements (E-8)

Objective: Require the building to meet the provisions of the 2012 International Energy Conservation Code (IECC) with any change in occupancy resulting in increased demand for energy or power. Two alternatives are presented for consideration.

Alternative 1:

Suggested Code Change Proposal

Add new Sections 1011 and 1011.1 as follows:

1011 ENERGY EFFICIENCY

1011.1 Increased demand. Where the occupancy of an existing building or part of an existing building is changed such that the new occupancy results in an increase in the connected lighting power, installed heating equipment capacity, or installed cooling equipment capacity of the building the new o ccupancy shall comply with the IECC or the building modified so that there is no incr ease in the in the connected lighting power, installed heating equipment capacity, or installed cooling equipment capacity.

Reason: Forty percent of U.S. energy use and seventy percent of U.S. electrical use are associated with existing buildings. As such, existing buildings represent a significant opportunity to save energy, reduce operating costs, and enhance the environment. A portion of the total undergoes a change in occupancy each year. Health and life safety codes currently address those changes in occupancy such that the resultant building after the occupancy change provides the necessary capabilities to protect the public health and safety. A review of Chapter 10 of the International Existing Buildings Code (IEBC) on changes in occupancy does not include a consideration of energy efficiency. The IEBC must address this issue where a change in use would result in an increase in energy use. This is consistent with, for instance, Section 1010 on plumbing, in which a change in occupancy that results in an increased demand for water triggers a requirement to meet the International Plumbing Code.

Consider, for instance, the change in use from a storage warehouse to retail space, a portion of an office building to food service, or any other number of situations in which the energy use ofthe building or spaces associated with the occupancy change will be increased. There currently is no way in the IEBC to address those, presenting a lost opportunity and even a way to circumvent the 2012 IECC. The proposed change addr esses this by offering two options by which to achieve compliance. One is to bring the building after the occupancy change up to the 2012 IECC, and the other is to simply accomplish the change with no increase in connected

load.

Cost Impact: There will be an increase in cost to the degree that changes in occupancy that previously were not required to meet the ener gy code will now be required to meet the energy
code.

Alternative 2:

Suggested Code Change Proposal

Add new Sections 1011 and 1011.1 as follows:

1011 ENERGY EFFICIENCY

1011.1 Increased demand. Where the occupancy of an existing building or part of an existing building is changed such that the new occupancy results in an increase in the installed capacity of the building electrical and/or energy systems from non-renewable sources the new occupancy shall comply with the IECC or the building modified so there is no increase in installed capacity of the bu ilding electrical and/or energy systems from non-renewable sources of electrical power or energy.

Reason: Forty percent of U.S. energy use and seventy percent of U.S. electrical use are associated with existing buildings. As such, existing buildings represent a significant opportunity to save energy, reduce operating costs, and enhance the environment. A portion of the total undergoes a change in occupancy each year. Health and life safety codes currently address those changes in occupancy such that the resultant building after the occupancy change provides the necessary capabilities to protect the public health and safety. A review of Chapter 10 of the International Existing Buildings Code (IEBC) on changes in occupancy indicated the chapter does not include a consideration of energy efficiency. The IEBC must address this issue where a change in use would result in an increase in energy use. This is consistent with, for instance, Section 1010 on plumbing, in which a change in occupancy that results in an increased demand for water triggers a requirement to meet the International Plumbing Code.

Consider, for instance, the change in use from a storage warehouse to retail space, a portion of an office building to food service, or any other number of situations in which the energy use of the building or spaces associated with the occupancy change will be increased. There currently is no way in the IEBC to address those, presenting a lost opportunity and even a way to circumvent the 2012 IECC. The proposed change addr esses this by offering two options by which to achieve compliance. One is to bring the building after the occupancy change up to the 2012 IECC, and the other is to simply accomplish the change with no increase in connected

load.Cost Impact: There will be an increase in cost to the degree that changes in occupancy that previously were not required to meet the ener gy code will now be required to meet the energy
code.