# PUBLIC CODE CHANGE PROPOSAL FORM

FOR PUBLIC PROPOSALS TO THE INTERNATIONAL CODES

2012-2014 CODE DEVELOPMENT CYCLE

CLOSING DATES: Group A Codes: January 3, 2012 Group B Codes: January 3, 2013 Group C Codes: January 6, 2014

*See Item 3 of these instructions for additional information concerning Group A and Group B Code Development Committ ees Responsibilities*

1)

Name: Date: Jurisdiction/Company:

Submitted on Behalf of:

Address: City: State: Zip Code:

Phone: Ext. Fax: E-mail address (see # 4 below):

2) Copyright Release: In accordance with Council Policy #28 Code Developmen t, all Code Change Proposal s, Floor Modifications and Public Comments are required to include a copyright release. A copy of the copyright release form is included at the end of thi s form.

Please follow the directions on the form. This form as well as an alternative release form can also be downloaded from the ICC website

at www.iccsafe.org

. If you have previously executed the copyright release for this cycle, please check the below:

______ 2012-2014 Cycle copyright release on file

3) Code: Indicate appropriate International Code (s) associated with this Public Proposal – Please use Acronym: ___IECC_____

If you have also submitted a separate coordination ch ange to another I-Code, please indicate the code: ________ (See section below for list of names and acronyms for the International Codes).

NOTE : Sections of the International Codes that have a letter desi gnation in brackets in front of th em are the responsibility of a

different committee than the committee normal ly responsible for that code. For instan ce, Section 301.1.4 of the IEBC has a [B] in front of it, meaning that this section is the re sponsibility of one of the IBC Code Devel opment Committees (in this case, IBC-S). Any proposed changes to Section 301.1.4 will be heard by the IBC-Structural committee.

Therefore, some code change proposals to Group B code text may be due by January 3, 2012, in order to be heard by Group A code development committees, and vice versa (proposed revision to a Group A code due January 3, 2013.) Please go to www.iccsafe.org/responsibilites for detailed information on Group A and Group B Code Development Committee responsibilities.

4) Multiple Proposals: A proponent shall not submit multiple code change propos als to the same code section. When a proponent submits multiple code cha nge proposals to the same section, the proposals sh all be considered as in complete proposals and not processed in accordance with Section 4.3 of CP #28. This restriction shall not apply to code change proposals that attempt to address differing subject matter within a code section.

5) Referenced Standards: Check here if this code change propos al includes reference to a standard that is not currently referenced in
one of the I-Codes. _____

NOTE : If a new referenced standard is proposed, a copy of the standard must be provided by th e proponent of the code change proposal. (This code change proposal will be considered incomplete and not processed if the new standard is not submitted in at least

consensus draft form in accordan ce with Section 3.6 of Council Policy CP #28.) If you have forwarded a copy of the standard(s) to ICC please check below: ______ Copy of new referenced standard(s) sent. (P lease check: Electronic ___ or Hard Copy ___)

6) E-mail address: Your email address will be published with your code change proposal unless you check here: ______

7) Information required: Be sure to format your proposal and include all information as indicated be low and in the Code Change Proposal Instructions’ section on Page 2 of this form.8) Format: Proposals should be sent to the office below via regular mail or email. An e-mail submittal is preferred, including an electronic version, in either WordPerfect or Word (see proposal formatting section on Page 2 of this form).

Please use a separate form (see page 3) fo r each proposal submitted. Note: All code changes received will receive an acknowle dgment by approximately two weeks after the code change deadline. Pl ease contact the ICC staff listed be low if you have not received an acknowledgment by two weeks afte r the code change deadline.

Group A Group B Group C Send to: IBC - International Building Code

IFGC - International Fuel Gas Code

IMC - International Mechanical

Code IPC - International Plumbing Code

IPSDC - International Private Sewage Disposal Code IADMIN – International Administrative Code (Chapter 1 of I-Codes except the IRC and the IECC, and Referenced Standards Updates) IEBC - International Existing Building Code IECC - International Energy Conservation

Code

IFC - International Fire Code

ICC PC - ICC Performance Code IPMC - International Property Maintenance

Code

IRC - International Residential Code

IWUIC - International Wildland-Urban

Interface Code IZC - International Zoning Code IgCC – International Green

Construction Code ISPSC – International Swimming Pool and Spa Code International Code Council Chicago District Office Attn: Dynice Broadnax

4051 West Flossmoor Road Country Club Hills, IL 60478-

5795

Fax: 708/799-0320 codechanges@iccsafe.org



### CODE CHANGE PROPOSAL INSTRUCTIONS

Please provide all of the following items in your code change proposal (see form on page 3). Your proposal should be entered on page 3 as a separate file. However, please read the instruc tions provided below for each pa rt of the code change proposal

. The sections identified in parentheses are the applicable sections from CP #28 Code Development. The full procedures can be downloaded from www.iccsafe.org.

PROPOSAL FORMATTING :

Show the proposal (see form on page 3) using strikeout , underline format. At the beginning of each sec tion, one of the following instruction
lines are also needed:
•Revise as follows
•Add new text as follows
•Delete and substitute as follows
•Delete without substitution

The only formatting that is needed is BOLDING, STRIKEOUT AND UNDERLINING . Please do not provide additional formatting such as tabs, columns etc. as th is will be done by ICC. DO NOT USE THE TRACKING CHANGES OPTION, AUTOMATIC NUMBERING, OR ANY OTHER ADVANCED FORMATTING TOOLS PROVIDED BY WORD.

SEPARATE GRAPHIC FILES ARE REQUIRED FOR GRAPHIC MATERIALS. Graphic materials (Graphs, maps, drawings, charts, photographs, etc.) must be submitted as sepa rate electronic files in .CDR, IA, TIF or .JPG format (300 DPI Minimum resolution; 600 DPI or more preferred) even though they may also be embedded in your Word or WordPerfect submittal

.

SUPPORTING INFORMATION : (3.3.4 & 3.4)

The following items are required to be includ ed in your proposal (see form on page 3):
1. The proponent shall clearly state the purpose of the proposed code change
2. The proponent shall provide a logical explanation which clearly shows why the current Code provisions are inadequate or overly restrictive, specifies the shortcomings of the current Code prov isions and explains how such pr oposals will improve the Code.
3. The proponent shall substantiate the proposed code change base d on technical information and s ubstantiation. A minimum of two copies of all substantiating inform ation shall be submitted.
4. The p ro p onent shall submit a biblio g ra p h y of an y substantiatin g material submitted with the code chan g e p ro p osal.

REFERENCED STANDARDS : (3.4 & 3.6)

List any new referenced standards that are proposed to be refere nced in the code and provide a minimum of two copies. See also Item 5 on page 1 regarding proposed new referenced st andards. Updates to currently referenced standards will be processed as a Group B p roposal. For ICC rules on referenced standards, see Section 3.6 of CP # 28. Additional copies will be required for committee members. I CC staff
will p rovide y ou with a mailin g list for the a pp ro p riate committees.

COST IMPACT : (3.3.5.6)

The proponent shall indicate one of the following regardi ng the cost impact of the code change proposal:
1 ) The code chan g e p ro p osal will increase the cost of construction; or2) The code change proposal will not increase the cost of construction. The proponent should submit information that supports their claim. Any information submitted will be considered by the code dev elopment
committee. This information will be included in the bibliography of the published code change proposal.

CODE CHANGE SUBMITTAL EXAMPLE



# Code: IBC –12/13

705.1

Proponent: John Doe, P.E., Acme Building Corporation, Inc, representing self

Revise as follows:

705.1 General. Each portion of a building separated by one or more a fire walls that comply complies with the provisions of this section Section 705 shall be considered a separate building.

Reason: A fire wall complying with Section 705 establishes the equi valent of separate buildings on either side of the fire wall. This proposal provides text that more succinctly states this purpose of a fire wall.

Cost Impact: The code change proposal will not in crease the cost of construction.

Public Hearing: Committee: AS AM D Assembly: ASF AMF DF



### CODE CHANGE PROPOSAL FORM (See instructions on page 2) 

# Code: ____IECC____ –12-14

Code Sections/Tables/Figures Proposed for Revision (3.3.2); Note: If the proposal is for a new section, indicate (new). Table Section R202, Section R403.4, Section R403.4.1 (new), Chapter 5.

Proponent: Name/Company/Representing (3.3.1) : ( NOTE: DO NOT USE ACRONYMS FOR YOUR COMPANY OR ORGANIZATIONAL NAME)

Add definition to Section R202 as follows:

DESUPERHEATER/WATER HEATER. A factory-made assembly of elements by which the flows of refrigerant vapor and water are maintained in such heat transfer relationship that the refrigerant vapor is desuper-heated and the water is heated. A water circulating pump may be included as part of the assembly.

Revise as follows:

R403.4 Service hot water systems. Energy conservation measures for service hot water systems shall be in
accordance with Sections R403.4.1 and R403.4.2 , R403.4.2, and R403.4.3

.

Add new Section R403.4.1 as follows and renumber subsequent sections:

R403.4.1 Water heating equipment (Prescriptive). In climate zones 1 through 5 each dwelling unit shall be provided with one or a combination of the following with t he capability to provide hot water to meet the anticipated needs of the dwelling unit:

1. a water heater with desuperheater test ed and listed in accordance with ARI 470 2. a heat pump water heater 3. a solar water heating system

4. an instantaneous water heater 5. a storage gas water heater with en ergy factor (EF) of 0.67 or greater.Exception: Replacements of existing water heating equipment.

2. Add new standard to Chapter 5 as follows:

AHRI 470-06 Performance Rating of Desuperheater/Water Heaters R403.4.1

Reason:

As shown in the attached analysis, there are cost effective ways to achieve significant energy savings in service water heating systems in climate zones 1-5 compared to standard-efficiency st orage electric and fuel-fired heaters. Th e proposed change offers multiple options for compliance with the new requirement.

Cost Impact: The code change propos al will increase the cost of construction.

Public Hearing: Committee: AS AM D Assembly: ASF AMF DF



## COPYRIGHT RELEASE FOR 2012-2014 PROPOSALS, MODIFICA TIONS and PUBLIC COMMENTS
SUBMITTED ON
ICC CODES
PRODUCED & PUBLISHED BY THE 

# INTERNATIONAL CODE COUNCIL

This form is required for all Proposals, Floor Modifications and Public Comments submitted to the International Code Council. Only one signed Copyright release form is required for the entire 2012- 2014 Cycle and will be kept on file and can be used for all Proposal, Floor Modification and Public Comment submittals you submit to ICC unless you r epresent multiple entities. An executed form is required for each entity represented.

I hereby grant and assign to ICC all rights in copyri ght I may have in any authorship contributions I make to ICC in the 2012-2014 Cycle in connection with any proposal and public comment, in its original form submitted or revised form, including written and verbal modifications submitted in
accordance with Section 5.5.2 of CP #28. I understand that I will have no rights in any ICC publications that use such contributions in the fo rm submitted by me or another similar form and certify that such contributions ar e not protected by the copyright of any other person or entity.

### Signature:

________________________________________________________________

Please type or print full name:

Jurisdiction/Company: ______

_______________________ ____________________

Entity Represented: _______

_______________________ _____________________

Contact info: Phone: _________ Email: ____________

_______________________

Date signed: ________________

_____________________ ____________________

PLEASE FAX OR MAIL THE SIGNED COPYRIGHT RELEASE TO:

Fax: ICC Codes & Standards Department - 708-799-0320

Email: dbroadnax@iccsafe.org

Mail: ICC Codes & Standards Development Chicago District Office

4051 W. Flossmoor Road Country Club Hills, IL 60478-5795

### Water Heaters

Description

Residential envelopes have been getting tighter and better over the last few years. As a result, domestic
water heating energy is emerging as a significant end-use from the efficiency stand-point. There are
multiple ways of improving the efficiency of generati ng hot water in homes. We analyzed some of the more
common methods – for homes with gas water heaters, water heaters with Energy factor (EF) greater than
the federal minimum baseline and tankless water heaters are analyzed; for homes with electric water
heaters, heat-pump water heaters are analyzed. Desuperheaters are analyzed for all cases.

The Life Cycle cost analysis uses the DOE Cost Effectiveness Methodology 1 for assessing cost
effectiveness. This analysis has been carried out for the single family prototype, for 15 locations, one
foundation type and one heating system except the heat pump water heater analysis which is carried out
for homes with electric resistance and heat pump space heating. Table 1 indicates the location cost indices
provided by Faithful and Gould (2011) 2 used to reflect local construction costs. Recent residential fuel
prices specific to each location summarized in Tabl e 2 are used for energy cost calculations. These have
been obtained from the DOE Energy Information Administration. 3 4

Table 1: Cost mult ipliers by State



### Location State Climate

Zone Moisture
Regime multiplier

Miami FL 1 moist 0.884

Phoenix AZ 2 dry 0.928

Houston TX 2 moist 0.837

El Paso TX 3 dry 0.837

San Francisco CA 3 marine 1.142

Memphis TN 3 moist 0.863

Albuquerque NM 4 dry 0.903

Salem OR 4 marine 1.038

Baltimore MD 4 moist 0.956

Boise ID 5 dry 0.918

Chicago IL 5 moist 1.069

Helena MT 6 dry 0.936

Burlington VT 6 moist 0.933

Duluth MN 7 moist 1.06

1 http://www.energycodes.gov/development/residential/methodology/

2 Faithful + Gould. 2011. Residential Energy Efficiency Measures – Locations Factors . Portland, Oregon. http://bc3.pnnl.gov/wiki/index.php/Downloads

3 U.S. Department of Energy (DOE). 2012a. Electric Power Monthly . DOE/EIA-0226. Washington, D.C. http://www.eia.doe.gov/cneaf/el ectricity/epm/table5_6_a.html

4 U.S. Department of Energy (DOE). 2012b. Natural Gas Monthly . DOE/EIA-0130. Washington, D.C. http://www.eia.gov/oil_gas/na tural_gas/data_publications/n atural_gas_monthly/ngm.html

### Fairbanks AK 8 moist 1.336



### High efficiency gas storage water heaters

This concept looks at the energy savings potential of high efficiency storage water heater. The residential
prototype is presently equipped with a 40 gallon hot water heater. Federal minimum efficiency
requirements were revised in 2010 and compliance with the required standards for water heaters is
required from April 2015. The new rule requires 40 gallon gas storage water heaters to have an EF of

0.615 5 . An EF of 0.67 is analyzed in this concept.

Table 2: Fuel Costs by State



### Location State Climate

Zone Moisture
Regime Electricity

‐ winter ($/kWh) Electricity

‐

summer ($/kWh) Gas ($/thm) Oil ($/MBtu)

Miami FL 1 moist 0.117 0.117 1.532 23.7

Phoenix AZ 2 dry 0.099 0.117 1.306 23.7

Houston TX 2 moist 0.11 0.12 0.814 23.7

El Paso TX 3 dry 0.11 0.12 0.814 23.7

San Francisco CA 3 marine 0.149 0.156 0.943 23.7

Memphis TN 3 moist 0.095 0.095 0.862 23.7
Albuquerque NM 4 dry 0.099 0.116 0.791 23.7

Salem OR 4 marine 0.091 0.092 1.174 23.7

Baltimore MD 4 moist 0.134 0.151 1.039 23.7

Boise ID 5 dry 0.078 0.084 0.869 23.7
Chicago IL 5 moist 0.108 0.122 0.717 23.7

Helena MT 6 dry 0.091 0.096 0.795 23.7
Burlington VT 6 moist 0.158 0.155 1.433 23.13

Duluth MN 7 moist 0.103 0.108 0.833 23.7

Fairbanks AK 8 moist 0.166 0.171 0.839 23.7

Energy Cost Savings

Figure 1 below shows energy cost savings for each climate zone.



### Cost Effectiveness

The cost for high efficiency water heaters were de rived from the Technical Support document and Life
Cycle Cost (LCC) spreadsheet s for the Appliance Standards rule-making for water heaters 67 . These costs
are blended for retrofits and new construction. To ge nerate costs specific to new construction alone, the
Crystal Ball (CB) analysis was re-run with the fracti ons set to 100% new construction and 0% retrofits.

5 http://www1.eere.energy.gov/buildings/appliance_st andards/residential/pdfs/ htgp_finalrule_fedreg.pdf

6 http://www1.eere.energy.gov/buildings/appliance_st andards/residential/heating_products_fr_tsd.html

7 http://www1.eere.energy.gov/buildings/appliance_sta ndards/residential/heating_products_fr_spreadsheets.

htmlThe total installed cost for a 40 gallon gas storage water heater with EF 0.62 works out to $1609 while the

total installed cost for a 40 gallon gas storage wa ter heater with EF 0.67 works out to $1468. This

unexpected drop in costs is due to lower venting cost s associated with the high efficiency water heater.
The baseline requires natural draft venting which has higher costs than the plastic power venting apparatus
required by the high efficiency water heater.

It can be concluded that using a higher efficiency wa ter heater not only saves energy during its life, but

also costs less to install. This measure is thus, cost-effective.

Figure 1: Energy Cost Savings for Gas Storage Wate r Heaters with EF 0.67 over the 2012 IECC code



### Tankless Water Heaters

The most common type of water heat ers in residences are storage ty pe. Stand-by losses are associated
with storage tank water heaters because hot water draws are inconsistent in homes. This concept looks at
tankless type of water heaters, whic h eliminate the stand-by losses almo st entirely. Tankless water heaters
have a small storage tank, usually 1 gallon, which ha s a small associated stand-by loss. Tankless water
heaters with an Energy Factor (EF) of 0.82, which is the minimum EF for EnergyStar tankless water

heaters 8 , are analyzed in this concept.

There is some evidence that instantaneous water hea ters don’t perform at their rated efficiency when

subjected to realistic hot water draw profiles, i.e., shorter draws that occu r frequently during a typical day in
residences. To account for this reduction in perform ance, the assumed EF of instantaneous water heaters

is reduced to 92% of its value 9

.

8 EnergyStar website http://www.energystar.gov/index.cfm?c =water_heat.pr_crit_water_heaters

9 RESNET reduction factor for the EF of instantaneous water heaters

### Energy Cost Savings

Figure 2 below shows energy cost savings for each climate zone.

Figure 2: Energy Cost Savings for Tankle ss Water Heaters over the 2012 IECC code



### Cost Effectiveness

The costs for gas fired instantaneous water heaters ar e derived from the Technical Support document and
Life Cycle Cost (LCC) spreadsheets for the Appliance Standards rule-making for water heaters. These

costs are blended for retrofits and new construction. To generate costs specific to new construction alone,
the Crystal Ball (CB) analysis was re-run with the frac tions set to 100% new construction and 0% retrofits.

The total installed cost for a 40 gallon gas storage water heater with EF 0.62 works out to $1609 while the

total installed cost for a gas fired instantaneous wa ter heater with EF 0.82 works out to $2376. Figure 3
below shows the Life Cycle Cost for this measure across all climate zones. Tankless water heaters turn out

to be cost effective in the warmer climate zones but not so much as we move to the colder climate zones.Figure 3: Life Cycle Cost for Tankless water heaters over the 2012 IECC. Negative values indicate savings

.



### Heat-Pump Water Heaters

Heat-Pump water heaters (HPWH) combine the elem ents of a heat-pump and a water heater. HPWHs
extract heat from the surrounding spac e and use it to heat water. As a result, they provide the dual benefit
of cooling a space while providing t he required hot water. We have considered a HPWH with EF 2.0 for this

concept.

The HPWH is assumed to be located inside the condi tioned living space. Water heaters are usually placed
in unconditioned garages or in closets inside a conditioned space. In order to perform effectively, HPWHs
require sufficient surrounding space for heat exchang e which may not always be available within a
conditioned space. Due to the nature of HPWHs, they perform much better within conditioned spaces in
cooling dominated climates. HPWHs are simulate d in all climate zones in this analysis.



### Energy Cost Savings

Figure 4 below shows energy cost savings for each climate zone.Figure 4: Energy Cost Savings for Heat-Pump Wate r Heaters over the 2012 IECC code (electric only)



### Cost Effectiveness

The cost for high efficiency water heaters were de rived from the Technical Support document and Life
Cycle Cost (LCC) spreadsheets for the Appliance Standards rule-making for water heaters. These costs
are blended for retrofits and new construction. To ge nerate costs specific to new construction alone, the
Crystal Ball (CB) analysis was re-run with the fracti ons set to 100% new construction and 0% retrofits.

According to this data, the installed cost of 40 gall on Electric Storage Water Heaters with EF 0.95 is $688
and that of an EF 2.35 Heat Pump Water Heater is $1 697. State cost multipliers from table 2 are used to
generate incremental costs by state. Figure 5 below show s the Life Cycle Cost Savings from this measure.
According to our analysis, Heat-Pump water heaters in place of electric storage water heaters are cost

effective in all zones.Figure 5: Life Cycle Cost for the concept over the 2012 IECC. Negative values indicate savings

.



### Desuperheaters

During summer operation, the heat removed from the refrigerant would normally be rejected to the
atmosphere. Using this heat in the hot water system , therefore, results in si gnificant energy savings
because hot water heating is performed at a reduced energy input (greatly reduced in some cases). Heat
supplied to the water during winter operation (in the heating season) is not "free" as in the cooling mode,
because that heat would normally be used to satisfy space heating demands. However, energy savings are
possible because the water heating takes place at an advantageous coefficient of performance (COP).



### Energy Cost Savings

Figure 6 below shows energy cost savings for each climate zone. Desuperheaters are most effective for
cooling dominated climate zones as it operates only when the air conditioner is running. Hence the
expected the energy savings are much higher for CZ 1- 3, with decreasing savings for the colder climate

zones.Figure 6: Energy Cost Savings over the 2012 IECC code for Desuperheaters



### Cost Effectiveness

Data available online documents the cost of equipmen t at $500 with installation costs ranging from $500-

$1000. 10 11 An incremental cost of $1250 has been assumed for both equipment and installation.

Figure 7: Life Cycle Costs over t he 2012 IECC code for Desuperheaters

10 

### http://bc3.pnnl.gov/wiki/inde x.php/Desuperheaters_(0004)

11 NW Council Cots on Desuperheaters. August 2008, Regional Technical Forum.