# Presentation: 142974

## Overview of the 2003 International Energy Conservation CodeEric Makela, International Conference of Building Officials

**Notes:**
In general, the ECCC applies to new construction I.e. new buildings and also new construction in existing buildings that create conditioned space.  More detail will be given for each of the applications in the next few slides.

## Presentation Overview

  Changes Approved in the 2000 and 2001 Code   		Development Cycle

  Changes Proposed and Tentatively Approved during the 	2002 Code Development Cycle

-   Changes Approved in the 2000 and 2001 Code   		Development Cycle
-   Changes Proposed and Tentatively Approved during the 	2002 Code Development Cycle

## International Energy Conservation CodeResidential Provisions

**Notes:**
In general, the ECCC applies to new construction I.e. new buildings and also new construction in existing buildings that create conditioned space.  More detail will be given for each of the applications in the next few slides.

## What Types of Buildings Must Comply?

-   Detached one and two - family dwellings
-   Previous Designation - Type A1

## What Types of Buildings Must Comply?

-   Group R-2:  Residential 	  containing more than 2 dwelling units _<_ 3 stories
-   Group R-4:  Residential care/assisted living _<_ 3 stories
-   Previous designation - Type A2

## Chapter 4: Systems Analysis

- Clarified References to Standard Design Fenestration and Wall U-factors.
- Fenestration U-factor reference = Table 402.1.1(1)
- Wall U-factor reference  = Table 402.1.1(2)
- Glazing Orientations
- Reduced from 8 to 4 for the Standard Design
- Production Developments
- Uses worst possible orientation for the proposed design to represent a group of buildings

**Notes:**
Residential Building:  Type A-1:  Detached one- and two- family dwellings.
Residential Building:  Type A-2:  A building containing multiple (I.e., three or more) dwelling units.

The minimum required R-value or maximum required U-value for each element of the thermal envelope shall meet Table 602.1.  If any one (1) element does not meet the minimum specified, then you automatically must use Chapter 4 or 5 to demonstrate compliance.

## Chapter 4: Systems Analysis

- Glazing Orientations
- Reduced from 8 to 4 for the Standard Design
- Requires equal orientation on North, East, South and West orientation
- 2000 IECC required glass to be modeled on North, Northeast, East, Southeast, South, Southwest, West and Northwest orientations
- Production Development
- Uses worst possible orientation for the proposed design to represent a group of buildings
- Use 8 orientations to determine worst case

**Notes:**
Residential Building:  Type A-1:  Detached one- and two- family dwellings.
Residential Building:  Type A-2:  A building containing multiple (I.e., three or more) dwelling units.

The minimum required R-value or maximum required U-value for each element of the thermal envelope shall meet Table 602.1.  If any one (1) element does not meet the minimum specified, then you automatically must use Chapter 4 or 5 to demonstrate compliance.

##  Chapter 4Proposed Code Changes

- Chapter 4 - Systems Analysis
- Requires calculation procedure to specify framing type
- Chapter 5 and 6
- Accounts for the effects of steel framing in roof/ceiling assemblies and floor assemblies
- New correction factors for roof and ceiling assemblies
- Allows for area weighted averaging to meet glazing U-factor requirement in Prescriptive Specification Approach

## Sunroom Addition

- Thermal Isolation
- Meet Table 502.2.5
- Requirements

- Separate Space Conditioning System

- Glazing U-factor
- Maximum of 0.50

## Sunroom Addition

- Proposed Changes

-   U-factor maximum of 0.50 in climates with 2,000 to 12,000 HDD
-   0 - 5,999 HDD
-   Ceiling R-value = 19
-   Wall R-value = 13
-   6,000 - 12,999 HDD
-   Ceiling R-value = 24
-   Wall R-value = 13

##  Chapter 5 & 6 Proposed Code Changes

- Steel framing factors - Roof/Ceiling Assemblies

##  Chapter 5 & 6 Proposed Code Changes

##  Chapter 5 & 6 Proposed Code Changes

- Steel framing factors - Floor Assemblies

## Duct Insulation Requirements

##  Chapter 5 & 6 Proposed Code Changes

- Prescriptive Specification Approach
- Area weighted averaging allowed to meet glazing U-factor requirement

## Chapter 6: Simplified PrescriptiveClean-up

- References IECC Section 502.1.1 for Moisture Control
- Vapor retarders required

-   References IECC Section 502.1.3 for recessed lighting fixtures
-   Air tight, IC rated recessed can lights required

**Notes:**
Residential Building:  Type A-1:  Detached one- and two- family dwellings.
Residential Building:  Type A-2:  A building containing multiple (I.e., three or more) dwelling units.

The minimum required R-value or maximum required U-value for each element of the thermal envelope shall meet Table 602.1.  If any one (1) element does not meet the minimum specified, then you automatically must use Chapter 4 or 5 to demonstrate compliance.

## Proposed Code Changes

- Chapter 5
- Electrical metering required for dwelling units in all buildings (also applies to Chapter 8).
- Includes one- and two-family residential
- R2 and R4 occupancies
- Dwelling units in 4 story and above “commercial” buildings

## International Energy Conservation CodeCommercial Provisions

**Notes:**
In general, the ECCC applies to new construction I.e. new buildings and also new construction in existing buildings that create conditioned space.  More detail will be given for each of the applications in the next few slides.

## Structure of the IECC

**Chapter 1  Administrative & Enforcement**
**Chapter 2  Definitions**
**Chapter 3  Design Conditions**
**Chapter 4  Residential - Systems Analysis**
**Chapter 5  Residential - Component Performance**
**Chapter 6  Simplified Prescriptive Requirements**
**Chapter 7  ASHRAE 90.1-1999 Energy Code Reference**
**Chapter 8  Design by Acceptable Practice for Commercial Buildings**
**Chapter 9  Referenced Standards**

## Structure of the IECC - Proposed

**Chapter 1  Administrative & Enforcement**
**Chapter 2  Definitions**
**Chapter 3  Design Conditions**
**Chapter 4  Residential - Systems Analysis**
**Chapter 5  Residential - Component Performance**
**Chapter 6  Simplified Prescriptive Requirements**
**Chapter 7  ASHRAE 90.1-2001 Energy Code Reference**
**Chapter 8  Design by Acceptable Practice for Commercial Buildings**
**Chapter 9  Referenced Standards**

## Chapter 8 Changes

-   Air Tight Recessed Fixtures

## Vestibules

- Enclosed Vestibule Required for:
- Spaces _>_ 3,000 Ft2
- Entrance doors
- Must have self-closing devices
- Exceptions
- Doors from guest room or dwelling unit
- Revolving doors
- Doors used primarily for vehicular movement, material handling and adjacent personnel doors

- _Space_  3000 FT2

- Vestibule

- Self Closing Doors

## Other Infiltration ControlsDampers Integral to Building Envelope

- Motorized dampers required on vents for
- Stairs
- Elevator shafts
- Other dampers
- Gravity dampers permitted on buildings
- < 3 stories

**Notes:**
Maximum leakage rate of 3cfm/ft2
Dampers to be closed during normal building operation
	Shall open as required by fire and smoke detection systems

## Loading Dock Weather seals

- Equip cargo doors and loading dock doors with weather seals
- Restrict infiltration

## Equipment Efficiency 

- New Efficiency Requirements Listed in Table 803.2.2, 803.3.2 and 803.3.3
- Took effect as of 10/29/01

**Notes:**
Table 703.3 lists the HVAC equipment efficiencies that manufacturers are required to meet or exceed in order to sell equipment in the United States.

Because this is a Federal mandate, it is enforced at the manufacturer and not in the field.  

## Economizers 

- Simple Systems
-   Air economizers required on systems
-   Cooling capacity > 65,000 Btu/h
-   Not required to be *integrated*
-   Not required for <135,000 Btu/h in climate zones 3c, 5b, 7, 13b and 14
-   Equipment efficiency trade-off

## Economizers 

- Complex Systems
-   Air or water economizers required    on systems
-   Cooling capacity > 65,000 Btu/h
-   Not required to be *integrated*
-   Not required for <135,000 Btu/h in climate zones 3c, 5b, 7, 13b and 14

## Heat Rejection Equipment Fan Speed Control

- Fan Motors _>_ 7 1⁄2 HP
- Capability to Operate Fan at Two-Thirds of Full Speed or Less, and
- Controls that Automatically Change the Fan Speed to Control the Leaving Fluid Temperature or Condensing Temperature/ Pressure of Heat Rejection Device

## Switching Requirements

- First Requirement
- Each space to have manual control
- Second Requirement
- Area < 250 ft**2**
- 2nd Control to reduce lighting load by 50%
- Area > 250 ft**2** in buildings larger than 5000 ft2
- Automatic control device
- Scheduled basis to control areas _<_ 25,000 ft**2** or no more than one floor
- Unscheduled basis by occupant intervention

## Proposed Code Changes

- Chapter 8
- Requires all spaces in buildings to have bi-level switching
- Requires automatic lighting shut-off in all areas of buildings greater than 5,000 ft2

## Proposed Code Changes

- Chapter 8
- Added occupancies to Interior Lighting Power Table

## Proposed Code Changes

- Chapter 8
- Clarified duct insulation requirement for ducts in unconditioned space vs. ducts outside the building
**803.2.8 (Supp) Duct and plenum insulation and sealing.**
- “All supply and return air ducts and plenums shall be
- insulated with a minimum of R-5 insulation when located in
- unconditioned spaces and with a minimum of R-8 insulation
- when located outside the building [envelope]. When located
- within a building envelope assembly, the duct or plenum
- shall be separated from the building exterior or
- unconditioned or exempt spaces by a minimum of R-8
- insulation.”

## Proposed Code Changes

- Chapter 8
- Hydronic system reset controls proposed for systems greater than 300,000 Btu/h
- Provides criteria for VAV systems before reheat/recool or temperature mixing take place.
- 1. 30 percent of the maximum supply air to each zone
- 2. 300 cfm or less where the maximum flow
- 	rate is less than 10 percent of the total fan system
- 	supply airflow rate
- 3. The minimum ventilation requirements of Chapter 4
- 	of the *International Mechanical Cod*e