# Presentation: 302505

## Standard 90.1-2001

- Jean J. Boulin, US DOE
- Bruce Hunn, ASHRAE
- Mark Halverson, PNNL

## Outline of Presentation

- Summary of Addenda
- Energy Impact of Addenda
- DOE Guidance to states
- ASHRAE Support Materials
- What’s coming in Standard 90.1-2004?

## ANSI/ASHRAE/IESNA Standard 90.1-2001

- 34 Addenda to the 1999 edition
- 5 Reductions in stringency
- 5 Increases in stringency
- Lots of clarifications, corrections and simplifications

**Notes:**
There are 34 addenda listed in Appendix F of Standard 90.1-2001 but one of them, addenda m was superseded by addenda ad.  Thus, there are really only 33 distinct sets of changes.  All of the changes were evaluated by DOE for their impact on energy efficiency in commercial buildings.  

## Addenda Identification

- Changes to the 1999 edition are marked in the margin of the text of the 2001 edition
- All addenda are listed in Appendix F of the 2001 edition
- ASHRAE maintains a database of addenda on their web site at _[www.](http://www.ashrae.org/)__[ashrae](http://www.ashrae.org/)__[.org](http://www.ashrae.org/)_
- In Shortcuts box (upper Right), select “Standards Addenda Index” in pop down box, and click “Go” button.

## Addenda Details

- It is NOT the intent of this session that you become intimately familiar with each and every addendum.
- Complete copies of all addenda are available on ASHRAE’s web site at _[www.ashrae.org](http://www.ashrae.org/)_
- In Shortcuts box (upper Right), select “Standards Addenda Index” in pop down box, and click “Go” button.

## Addenda Topics

- Administration and Enforcement (2)
- Envelope (9)
- HVAC and SWH (13)
- Lighting and Power (8)
- Energy Cost Budget (2)

**Notes:**
Some of these also addressed definitions associated with these topics.  

## Addenda Stringency

- DOE’s Building Energy Codes Program (BECP) evaluates the impact of each addendum on the energy efficiency of commercial buildings.
- Details will be posted on DOE’s web site at _[www.](http://www.energycodes.gov/)__[energycodes](http://www.energycodes.gov/)__[.](http://www.energycodes.gov/)__[gov](http://www.energycodes.gov/)_

## Addenda Overall Rating

- All addenda are rated with smiley faces.
- Red frown for reduction in stringency 	
- Yellow smile for neutral stringency 	
- Green smile for increase in stringency 	

## Special Note for State Adoption

- Addenda are rated on their impact to the US building stock as a whole.
- Addenda may be positive, neutral, or negative in their impact to specific states.
- Addenda may also have multiple parts that may be positive, neutral, or negative in their impact.

**Notes:**
Example:  The negative rated addenda g that reduce heated slab edge insulation requirements only impact the northern regions of the US.  For states that are not in the northern US, this addenda would be rated “neutral” (or in fact irrelevant).  However, few of the addenda are climate dependent.  Many more of the addenda are HVAC system specific and the impact of these addenda in a state depends on whether or not those systems are used in that state. Example:  Addenda r on economizer exceptions is neutral overall, but is essentially irrelevant in the southern tier of states where economizers are not required under any conditions.   

## Administration and Enforcement

- Clarifies treatment of alterations to existing buildings  
- Clarifies separate treatment of additions and alterations to existing buildings 

**Notes:**
Addenda af makes changes to Section 4.1.2.2 to strengthen the standard and eliminate possibility of loopholes.  
Addenda am makes a number of changes to Section 4.1 

## Envelope

- Clarifies “substantial contact” 
- Clarifies roof insulation exceptions 
- Clarifies use of slab F-factors 
- Clarifies heat capacity calculation use 
- Modifies residential slab requirements 

**Notes:**
Addenda a
  Addenda b
Addenda d
Addenda e
Addenda f

## Envelope

- Modifies heated slab requirements 
- Modifies glazed wall system requirements 
- Revises SI U-factors for consistency with IP 
- Restructures envelope section 

**Notes:**
6. Addenda g
Addenda ag
Addenda ak
Addenda ao

## HVAC and SWH

- Modifies equipment efficiency requirements 
- Modifies zone thermostat control requirements 
- Modifies shutoff damper control requirements 
- Modifies shutoff damper control requirements 
- Modifies zone isolation requirements 

**Notes:**
1.Addenda j
2. Addenda k
Addenda m (folded in addenda ad)
Addenda n
Addenda o

## HVAC and SWH

- Removes enclosed parking garage ventilation requirements 
- Modifies economizer exceptions 
- Modifies economizer requirements 
- Modifies system balancing requirements 
- Modifies heat pump requirements 

**Notes:**
6. Addenda q
7. Addenda r
Addenda s
Addenda t
Addenda u

## HVAC and SWH

- Modifies SWH sizing requirements 
- Modifies a number of HVAC tables and adds new requirements 	 and 
- Modifies a number of HVAC related definitions and deleted certain requirements for system balancing 

**Notes:**
11. Addenda ac
12. Addenda ad – contains “bad” addenda m
13.  Addenda al

## Lighting and Power

- Clarifies definition of “occupant intervention” 
- Clarifies use of additional interior allowance 
- Clarifies definition of “general low bay” and “general high bay” 
- Clarifies intent of exterior lighting power requirements 

**Notes:**
Addenda v
Addenda w
Addenda y
Addenda z

## Lighting and Power

- Clarifies that power “design load” is not necessarily “full connected load” 
- Clarifies use of additional power allowances 
- Allows use of building area method for all buildings 
- Clarifies use of building area method 

**Notes:**
5. Addenda aa
6. Addenda ab
7. Addenda ah
8. Addenda ai

## Energy Cost Budget Method

- Coordinates ECB with alteration and additions sections of Section 4 
- Clarifies rules for air and water economizers 

**Notes:**
Addenda an
Addenda ap

## Focus on the “good”

- Addendum *d* allows for the use of combined horizontal and vertical insulation on slab edges
- Addendum *af* includes changes that are both good and bad for stringency of existing buildings, with the only “bad” item being a provision for tradeoffs between an existing building and addition to allow compliance of the addition.

## Focus on the “good”

- Addendum *ad* adds requirements for buried duct insulation, restricts use of low leakage dampers for closed circuit cooling towers, adds performance requirements for gravity dampers, and makes a number of other changes impacting mechanical systems. (*ad* has both “good” and “bad” parts)

## Focus on the “bad”

- Addendum** ***f *removes slab insulation requirements for high-rise residential in ASHRAE zones 19-20
- Addendum *g* removes slab insulation requirements for heated slabs in zones 19-26 (northern US)

**Notes:**
See map

## Areas impacted by Addendas f and g

**Notes:**
Zones 19 and 20 – light gray on map
Higher zones – dark gray on map

## Focus on the “bad”

- Addendum *m* (part of addenda *ad*) relaxes damper leakage requirements in very cold, very hot, and very mild climates

**Notes:**
Zones 19 and 20 are only found in NH, ME, MN, MT, SD, WY, and WI
See maps for both of these

## Areas Impacted by Addenda ad

**Notes:**
Very cold – Same zones 19-26 as previous map
Very Hot – Tips of Texas, Florida, and part of Arizona/California
Very Mild – Los Angeles CA

## Focus on the “bad”

- Addendum *n* slightly relaxes requirements for use of motorized dampers
- Addendum *t* eliminates the performance requirements for air and water system balancing (but maintains that these systems must still be balanced)

**Notes:**
Zones 19 and 20 are only found in NH, ME, MN, MT, SD, WY, and WI

## DOE Determinations

- DOE issued a positive determination on Standard 90.1-1999, July 15, 2002.
- States are required to update their commercial code to meet or exceed this standard by _July 15, 2004_.
- Details
- Federal Register at _[www.](http://www.gpoaccess.gov/fr/index.html)__[gpoaccess](http://www.gpoaccess.gov/fr/index.html)__[.](http://www.gpoaccess.gov/fr/index.html)__[gov](http://www.gpoaccess.gov/fr/index.html)__[/](http://www.gpoaccess.gov/fr/index.html)__[fr](http://www.gpoaccess.gov/fr/index.html)_
- DOE’s web site at _[www.energycodes.gov](http://www.energycodes.gov/)_
- DOE is still in the process of drafting its determination on the 2001 edition.

## States Should Consider

- Improvements, enhancements, and clarifications made in Standard 90.1-2001 when adopting Standard 90.1-1999.
- To reach consensus on the 1999 edition, committee agreed to address subcommittee resolved issues as addendum in new continuous maintenance process.
- After dust settled in 1999, need for clarifications and intent changes addressed in addendum.

## States Should Consider

- Adoption of the 2001 edition
- Amending the standard in those specific areas that decreased stringency from Standard 90.1-1999, in your state.
- Some requirements in the 1999 edition changed in the 2001 edition have become widely accepted
- Referencing recently updated standards

**Notes:**
Reasons to adopt 90.1-2001 include the fact that it is referenced in the 2003 IECC and the fact that a number of the changes do indeed make the standard more usable for designers.  Standard 90.1-2001 is also the newest version of this standard and as such can be considered the “standard of care” for HVAC designers.  

## ASHRAE Support

- Electronic standard
- Online compliance forms
- Online addenda
- Interpretations (formal and informal)
- Technical Services Engineer (Steve Hammerling)

## Resources for Implementation

- Users Manual includes compliance forms, examples, and ENVSTD software for Windows
- Online standard, compliance forms, and addenda
- Professional Development Seminar: “Complying with Standard 90.1”

## Resources for Implementation (continued)

- Continuous Maintenance
- Proposed addenda may be submitted at any time
- SSPC must take documented, consensus action within one year and must notify proposer of action
- Interpretation Requests handled by 90.1 Committee
- Informal (unofficial) – chair or staff respond
- Formal (official) – SSPC approves response

##         CODE INTERACTION            SUBCOMMITTEE

- Work closely with model code organizations to incorporate features of 90.1
- Adoption by reference
- By insertion of key 90.1 elements
- Synchronize with model code cycles
- Republish standards on 3-year cycle coordinated with model code organizations

## Contact ASHRAE

- Web _[www.ashrae.org](http://www.ashrae.org/)_
- Phone (404)636-8400
- Technical Services Engineer
- Steve Hammerling
- E-mail _[shammerling@ashrae.org](mailto:shammerling@ashrae.org)_

## What’s coming in Standard 90.1-2004?

- Revised lighting power densities
- Additional guidance for LEED users

## Addendum to the 1999 Edition (more)

- The following slides have additional information about the addendum.

## Additional Slides and Information

- Additional slides and information related to Standard 90.1-2001 will be available from the DOE web site after the workshop.  _[www.](http://www.energycodes.gov/)__[energycodes](http://www.energycodes.gov/)__[.](http://www.energycodes.gov/)__[gov](http://www.energycodes.gov/)_

## Questions?