# Presentation: 299347

## Proposed Changes to the IECC

- Selected Commercial Provisions

- David Weitz
- Director, Applied Building Science Division
- Conservation Services Group

- USDOE Energy Code Workshop	Denver, CO    August 1, 2006

## Note: Inclusion or exclusion of proposals on this partial list does not indicate endorsement or lack of endorsement.  Selection is at the sole discretion of the presenter, and does not reflect any position or interpretation of the International Code Council or the IECC development committee.

## Slide 3

| EC1 | Establishes new Chapter 5 category of hi-rise residential buildings with some envelope requirements different from non-residential.  New Table 502.2(3) for hi-rise residential envelope requirements. |
| --- | --- |
| EC3 | Removes carte blanche exemption for historic buildings, and give BO authorization to limit which sections apply. |
| EC6 | Applies LPDs when building area type changes in existing building. |
| EC7 | Requires newly conditioned spaces to come into full compliance. |
| EC9 | Allows AAMA rating procedure for U-factor and SHGC of "commercial" window products. (in addition to  current NFRC procedures. |

## Slide 4

| EC28 | Establishes "Vapor Retarder Classes" (based on permeance,) and modifies performance requirement based on climate zones. |
| --- | --- |
| EC82, 84,85,86 | Introduces UA and SHGCA trade-off table and procedure for compliance without using ASHRAE when glazing exceeds limits of Table 502.3, or when if Rx values are unacceptable. |
| EC87 | Increases selected component Rx stringency in Zones 5-8. |
| EC90 | Increases allowable skylight area to 6% with appropriate daylighting controls. |
| EC91 | Reintroduces WWR in Table 502.3 (30-35-40%); eliminates frame type categories. |

## Slide 5

| EC92, 95 | Eliminates categories of skylights (plastic vs glass); EC92 retains current plastic U-factor and eliminates SHGC requirement in all zones; EC95 retains glass U-factors with decreases in zones 1-3. |
| --- | --- |
| EC96 | Introduces “Air Barrier” requirement with three compliance alternatives: 1) material air permeance,             2) assembly air leakage, 3) whole building air leakage. |
| EC97 | Introduces “Air Barrier” requirement with only whole building air leakage compliance. |
| EC103 | Raise full load and IPLV efficiencies for electric chillers, including path for Adjustable Speed Drives |

## Slide 6

| EC104 | New requirements for Demand Control Ventilation to automatically reduce outdoor air in defined spaces when actual occupancy is less than design occupancy. |
| --- | --- |
| EC110 | Introduces new detailed commissioning requirements for mechanical systems. |
| EC111 | Introduces ASHRAE 90.1 Commissioning requirements for HVAC systems in building s over 50,000 sf. |
| EC114 | Changes climate zone requirements for economizers, reducing number of zones with no requirement, and expanding number of zones with 54,000 Btu/h threshold. |

## Complete monograph is available from ICC at:

| EC122 | Defines "Daylight Zone" around skylights and vertical fenestration; Requires individual lighting controls for all separate daylight zones;   [No requirement for auto shut-off or dimming of lights within daylight zone.] |
| --- | --- |

- www.iccsafe.org/cs/codes/2006-07cycle/ProposedChanges/index.html

## ICC Development Schedule

| Code Development Hearings | September 20-30, 2006 |
| --- | --- |
| Publication: “Report of the Public Hearing” | December 1, 2006 |
| Deadline for Receipt of Public Comments | January 24, 2007 |
| Publication of Public Comments: “Final Action Agenda” | April 6, 2007 |
| Final Action Hearings | May 22-25, 2007 (tentative) |