2013 title 24 residential new constructionecusector.com/uploads/1/0/1/6/101615310/residential...2013...

2013 Title 24 Residential New Construction

Martyn Dodd

2013 Title 24 Residential Seminar 2

Course Objectives

Identify the major requirements in the Low-

rise Residential Title 24 requirements

Identify the major new requirements — and

associated forms and procedures — for

residential new construction:

Mandatory Measures

Prescriptive Approach

Performance Approaches

Mechanical Ventilation

HERS Measures

Welc

om

e

/ In

trod

uction /

Announcem

ents

What's New?

Welcome / Introduction / Announcements

What’s New? (Standards, Scope, Procedures, Forms)

● Procedures

● CF-1R Forms

● CF-2R Forms

● CF-3R Forms

Residential Prescriptive Approach

Residential Performance Approach

New Ventilation Requirements

HERS Measures

2013 Title 24 Residential Standards 4

Update Schedule

May 31, 2012 Business Meeting – Language Adoption

Jul 1, 2014 Implementation Date

Any projects that apply for permit on or after Jul 1, 2014 will be

subject to the 2013 Standards.

Information and Documents available at:

www.energy.ca.gov

www.energy.ca.gov/title24/2013standards

What’s N

ew

http://www.energy.ca.gov/title24/2013standards/

Mandatory Measures

Frame wall insulation minimum = R-13 (2x4)

Frame wall insulation minimum = R-19 (2x6)

Ceiling/Roof insulation minimum = R-30

Exception: Addition/Alteration = R-19

Raised floor insulation minimum = R-19

Vapor barrier on walls in Zones 14 & 16

All zones, unvented crawlspace vapor barrier

Maximum fenestration U-factor = 0.58

Can average across entire home

Exception: up to 10 sqft (or 0.5% times floor area) of

fenestration

2013 Title 24 Standards 5

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Mandatory Measures

Eliminated by CEC

No MF-1R

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2013 Title 24 Residential Standards

Repository

An electronic storage mechanism to archive all residential HERS

compliance documents

HERS providers will place registered documents, and probably

data files describing the buildings into the repository

Will provide an archived “snapshot” of the building for the CEC

Forms CF-1R/CF-2R/CF-3R will be kept in repository for the

enforcement division

Inspectors can log on to verify projects are registered


Scope &

Applic

ation

Performance Modeling

Modeling will use new simulation engine CSE (California Simulation

Engine) that is supplied by the CEC

Simulation will go from once per hour to 30 times per hour for more

accurate mass simulations

Run times will be slower

Credit for Photovoltaic systems in Climate Zones 9-15

CEC will maintain new Compliance Manager software that will

provide Standard/Proposed building rules modeling

All software vendors will use the same Compliance Manager plug-in

for Title 24 results


Scope &

Applic

ation

Performance Compliance Forms

Performance based Compliance forms will be developed in

electronic format (PDF) by the CEC

Compliance forms will be housed on a Web server (Internet)

Certified compliance tools will have to contact the web server

Project information will be uploaded by the software onto the server

Server will hand software back the completed CF-1R report as a

secure PDF

Any creation of a CF-1R will require Internet access to the CEC’s

server

For the HERS registration process, this secure CF-1R will be

uploaded to the HERS provider for registration and signatures, as

per current procedures


Scope &

Applic

ation

10

Procedures

1. CF-1R is prepared by consultant by hand or with

software.

2. CF-1R is then uploaded to the HERS provider of choice

(CHEERS or CalCERTS)

a) Forms done by hand will be scanned and sent in.

b) Forms done with software will be zipped up by the

software automatically and then can be sent in

c) Some software can auto-register CF-1R.

d) In all cases, project will need to be registered (fee)

Registration of CF-1R

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11

Procedures

3. Registration information will be added by HERS provider

on bottom of CF-1R.

4. Signatures will be uploaded by consultant and designer

and added to the CF-1R.

Registration of CF-1R (continued)

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12

Procedures

5. Registered version of CF-1R will be issued by HERS

provider for Building Department submittal.

6. Home is completed, Rater will then upload HERS testing

info and registered CF-2R will then be issued by HERS

provider.

7. Builder will upload CF-3R information and registered CF-

3R.

8. Information on project (as designed, as tested, as built)

will be available to CEC for future enforcement.

Registration of CF-1R (continued)

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Forms: Certificate of Compliance (CF-1R)

Form Name Use Description

Performance Approach

CF1R-PRF-01-E New Construction, Additions, Alterations,

E+A, E+A+A

Performance compliance method

Prescriptive Approach – all components

CF1R-NCB-01-E New Construction New constructed buildings and addition greater than

1,000 sf

CF1R-ADD-01-E Additions Addition less than 1,000 sf

CF1R-ALT-01-E Alterations Non HVAC Alterations

Prescriptive Approach – HVAC only

CF1R-ALT-02a-E HVAC alterations New ducts greater than 40 linear ft.

CF1R-ALT-02b-E HVAC alterations Equipment or component changeout

CF1R-ALT-02c-E HVAC alterations Equipment or component changeout with all new ducts

CF1R-ALT-02d-E HVAC alterations Entirely new or replacement system

CF1R-ALT-03-E HVAC alterations Paper version of CF1R-ALT-HVAC CZ 1, 3-7, 16

CF1R-ALT-04-E HVAC alterations Paper version of CF1R-ALT-HVAC CZ 2, 8-15

Prescriptive Worksheets – Envelope

CF1R-ENV-01-E Envelope worksheet EZ Frame - opaque

CF1R-ENV-02-E Envelope worksheet Area weighted average calculation

CF1R-ENV-03-E Envelope worksheet SHGC

CF1R-ENV-04-E Envelope worksheet Cool roof and SRI

Prescriptive Worksheets - Plumbing

CF1R-PLB-01-E Hydronic heating worksheet Hydronic heating system

Prescriptive Worksheets - Solar

CF1R-SRA-01-E Solar worksheet Solar ready areas

CF1R-SRA-02-E Solar worksheet Minimum Solar zone area

CF1R-STH-01-E Solar worksheet OG 300 Solar water heating system


Forms: CF-2R Certificate of Installation Non HERS (previously known as CF-6R’s)


Non-HERS - Envelope

CF2R-ENV-01-E Envelope – non HERS Fenestration and site-built fenestration

CF2R-ENV-02-E Envelope – non HERS Envelope air sealing requirements

CF2R-ENV-03-E Envelope – non HERS Insulation installation

CF2R-ENV-04-E Envelope – non HERS Roofing: Cool Roof

Non-HERS – Lighting

CF2R-LTG-01-E Lighting – non HERS Single family dwellings

CF2R-LTG-02-E Lighting – non HERS Multi family dwellings

Non-HERS – Photovoltaic

CF2R-SPV-01a-E Photovoltaic– non HERS Photo voltaic systems compliance credits

CF2R-SPV-01b-E Photovoltaic– non HERS Exception to solar ready area requirements

CF2R-SPV-01c-E Photovoltaic– non HERS PV Compliance credits and exception to solar ready area requirements

Non-HERS – Mechanical

CF2R-MCH-01-E Mechanical – non HERS HVAC systems, ducts, fans and thermostats

CF2R-MCH-02-E Mechanical – non HERS Whole house fan

CF2R-MCH-04-E Mechanical – non HERS Evaporative coolers

CF2R-MCH-05-E Mechanical – non HERS Ice storage air conditioning units

CF2R-MCH-06-E Mechanical – non HERS Verification of air filtration

CF2R-MCH-25f-E Mechanical – non HERS Verification of refrigerant charge – packaged system manufacturer

refrigerant charge certification

Non-HERS – Plumbing

CF2R-PLB-01-E Plumbing– non HERS Water heating system – general information

CF2R-PLB-02-E Plumbing– non HERS Single dwelling unit hot water distribution system

CF2R-PLB-03-E Plumbing– non HERS Multi-family central hot water distribution system

CF2R-PLB-04-E Plumbing– non HERS Pool and spa systems

Non-HERS – Solar Thermal

CF2R-STH-01-E Solar thermal– non HERS Solar water heating system

Forms: CF-2R Certificate of Installation HERS (previously known as CF-6R’s)

Course Title 15


HERS - Envelope

CF2R-ENV-20a-H Envelope – HERS Building envelope air leakage: single point test with manual meter

CF2R-ENV-20b-H Envelope – HERS Building envelope air leakage: single point test with automatic meter

CF2R-ENV-20c-H Envelope – HERS Building envelope air leakage: multi-point test

CF2R-ENV-20d-H Envelope – HERS Building envelope air leakage: repeated single point with manual meter

CF2R-ENV-20e-H Envelope – HERS Building envelope air leakage: repeated single point with manual meter

CF2R-ENV-21a-H Envelope – HERS Quality Insulation Installation – air infiltration sealing – framing stage for

batt, loose fill and SPF

CF2R-ENV-21b-H Envelope – HERS Quality Insulation Installation – air infiltration sealing – framing stage for SIP

and ICF

CF2R-ENV-22-H Envelope – HERS Quality Insulation Installation – air infiltration sealing – Ceiling/roof deck

CF2R-ENV-23-H Envelope – HERS Quality Insulation Installation – air infiltration sealing – Insulation stage

HERS - Plumbing

CF2R-PLB-20-H Plumbing– HERS Single dwelling unit hot water system distribution

CF2R-PLB-21-H Plumbing– HERS Multi-family central hot water system distribution

Forms: CF-2R Certificate of Installation HERS / Mechanical (previously known as CF-6R’s)

Course Title 16


HERS - Mechanical

CF2R-MCH-20a-H Mechanical – HERS Duct leakage measurement – new system

CF2R-MCH-20b-H Mechanical – HERS Duct leakage measurement – low leakage ducts in conditioned space

CF2R-MCH-20c-H Mechanical – HERS Duct leakage measurement – low leakage air handling units

CF2R-MCH-20d-H Mechanical – HERS Duct leakage measurement – Altered (existing) system

CF2R-MCH-20e-H Mechanical – HERS Duct leakage measurement – Sealing of all accessible leaks

CF2R-MCH-21-H Mechanical – HERS Duct location verification (directly conditioned space)

CF2R-MCH-22-H Mechanical – HERS Forced air system fan efficacy (watt/cfm)

CF2R-MCH-23a-H Mechanical – HERS Forced air system airflow rate (cfm/ton) single zone or zonally controlled

CF2R-MCH-23b-H Mechanical – HERS Forced air system airflow rate (cfm/ton) zonally controlled

CF2R-MCH-23c-H Mechanical – HERS Forced air system airflow rate (cfm/ton) alternative compliance

CF2R-MCH-25a-H Mechanical – HERS Refrigerant charge – superheat method

CF2R-MCH-25b-H Mechanical – HERS Refrigerant charge – subcooling method

CF2R-MCH-25c-H Mechanical – HERS Refrigerant charge – weigh-in procedure

CF2R-MCH-25d-H Mechanical – HERS Refrigerant charge – charge indicator display

CF2R-MCH-25e-H Mechanical – HERS Refrigerant charge – winter setup

CF2R-MCH-26-H Mechanical – HERS Verified EER or SEER

CF2R-MCH-27a-H Mechanical – HERS Mechanical Ventilation – continuous – fan vent rate method

CF2R-MCH-27b-H Mechanical – HERS Mechanical Ventilation – continuous – total vent rate method

CF2R-MCH-27c-H Mechanical – HERS Mechanical Ventilation – intermittent – fan vent rate method

CF2R-MCH-27d-H Mechanical – HERS Mechanical Ventilation – intermittent – total vent rate method

CF2R-MCH-28-H Mechanical – HERS Return duct and filter grille design

CF2R-MCH-29-H Mechanical – HERS Supply duct surface and R-value

CF2R-MCH-30-H Mechanical – HERS Ventilation cooling compliance credit

CF2R-MCH-31-H Mechanical – HERS Buried ducts and deeply buried ducts

Forms: CF-3R Certificate of Verification (previously known as CF-4R’s) HERS


HERS Envelope

CF3R-ENV-20a-H Envelope – HERS Building envelope air leakage – single point with manual meter

CF3R-ENV-20b-H Envelope – HERS Building envelope air leakage – single point with automatic meter

CF3R-ENV-20c-H Envelope – HERS Building envelope air leakage – Multi point test

CF3R-ENV-20d-H Envelope – HERS Building envelope air leakage – repeated point with manual meter

CF3R-ENV-20e-H Envelope – HERS Building envelope air leakage – repeated point with automatic meter

CF3R-ENV-21a-H Envelope – HERS Quality insulation installation – framing stage – wood frame

CF3R-ENV-21b-H Envelope – HERS Quality insulation installation – framing stage – SIP or ICF

CF3R-ENV-22-H Envelope – HERS Quality insulation installation – ceiling/roof deck – air filtration sealing

CF3R-ENV-23-H Envelope – HERS Quality insulation installation – insulation stage

HERS - Plumbing

CF3R-PLB-20-H Plumbing– HERS Single dwelling unit hot water system distribution

CF3R-PLB-21-H Plumbing– HERS Multi-family central hot water system distribution

HERS – Existing Conditions

CF3R-EXH-20-H Existing conditioned– HERS Verify existing conditioned for CF1R-PERF-ALT credit (no CF2R)

Forms: CF-3R Certificate of Verification (previously known as CF-4R’s) HERS / Mechanical

Course Title 18


HERS Mechanical

CF3R-MCH-20a-H Mechanical – HERS Duct leakage measurement – new system

CF3R-MCH-20b-H Mechanical – HERS Duct leakage measurement – low leakage ducts in conditioned space

CF3R-MCH-20c-H Mechanical – HERS Duct leakage measurement – low leakage air handling units

CF3R-MCH-20d-H Mechanical – HERS Duct leakage measurement – Altered (existing) system

CF3R-MCH-20e-H Mechanical – HERS Duct leakage measurement – Sealing of all accessible leaks

CF3R-MCH-21-H Mechanical – HERS Duct location verification (directly conditioned space)

CF3R-MCH-22-H Mechanical – HERS Forced air system fan efficacy (watt/cfm)

CF3R-MCH-23a-H Mechanical – HERS Forced air system airflow rate (cfm/ton) single zone or zonally controlled

CF3R-MCH-23b-H Mechanical – HERS Forced air system airflow rate (cfm/ton) zonally controlled

CF3R-MCH-23c-H Mechanical – HERS Forced air system airflow rate (cfm/ton) alternative compliance

CF3R-MCH-25a-H Mechanical – HERS Refrigerant charge – superheat method

CF3R-MCH-25b-H Mechanical – HERS Refrigerant charge – subcooling method

CF3R-MCH-25c-H Mechanical – HERS Refrigerant charge – weigh-in procedure

CF3R-MCH-25d-H Mechanical – HERS Refrigerant charge – charge indicator display

CF3R-MCH-25e-H Mechanical – HERS Refrigerant charge – winter setup

CF3R-MCH-26-H Mechanical – HERS Verified EER or SEER

CF3R-MCH-27a-H Mechanical – HERS Mechanical Ventilation – continuous – fan vent rate method

CF3R-MCH-27b-H Mechanical – HERS Mechanical Ventilation – continuous – total vent rate method

CF3R-MCH-27c-H Mechanical – HERS Mechanical Ventilation – intermittent – fan vent rate method

CF3R-MCH-27d-H Mechanical – HERS Mechanical Ventilation – intermittent – total vent rate method

CF3R-MCH-28-H Mechanical – HERS Return duct and filter grille design

CF3R-MCH-29-H Mechanical – HERS Supply duct surface and R-value

CF3R-MCH-30-H Mechanical – HERS Ventilation cooling compliance credit

CF3R-MCH-31-H Mechanical – HERS Buried ducts and deeply buried ducts


Module Summary W

hat’s N

ew

New Compliance Forms

No more MF-1R Forms

New Compliance Simulation Engine

Prescriptive Approach




● Overview

● Cool Roofs

● Fenestration

● Insulation

● HVAC

● Forms



HERS Measures

2013 Residential Envelope Seminar 21

Overview

Package A replaces Package D

Package C and E are gone

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Fenestration

Windows:

U-factor = 0.32 in all climate zones

SHGC = 0.25 (except zones 1,3, &

5)

Maximum area: 20% of floor area

Maximum West area of 5% (except

zones 1,3,5 & 6)

Skylight is treated as West for this

rule


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What is a Cool Roof ?

Typically light in color

High solar reflectance

High thermal emittance

Properties of roofing surface,

not insulation

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Single Ply Membranes Built-up Systems

Courtesy of Johns Manville

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Types of Cool Roofs

Liquid Applied Coatings

Courtesy of http://www.pstvnrg.com/homebase/

Coated Metal

Courtesy of Cool Metal Roofing Coalition

Foam Insulation

Courtesy of Ari-Thane Foam

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Types of Cool Roofs

Steep Slope Roofs

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Sandstone - RB39

CRRC Product ID #

0882-0008

Solar Reflectance 0.62

Thermal Emittance 0.82

Navajo Gold - RB46

CRRC Product ID #

0882-0010



Brick Red - 2F43

CRRC Product ID #

0882-0027




What Are Reflectance and Emittance?

Solar Reflectance – The

percentage of solar energy that

reflects off the roof surface.

Not ALL energy is reflected

off the roof’s surface

Some is absorbed.

Thermal Emittance – The

percentage of energy that the

roof is able to radiate away

after it is absorbed.

A roof with low emittance

will heat up

Heat has time to penetrate

downward into the building

Courtesy of Cool Metal Roofing Coalition

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Cool Roofs

Prescriptive Requirement

Low-slope < 2/12 (zones 13, 15)

Reflectance > 0.63

Emittance > 0.75

OR

SRI > 75

Steep-slope > 2/12 (zones 10-

15)

Reflectance > 0.20

Emittance > 0.75

OR

SRI > 16 2013 Title 24 Residential Standards 28

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Solar Reflectance Index (SRI)

Calculator

http://www.energy.ca.gov/title24/

2008standards/sri_calculator/

Insulation

Prescriptive ceiling insulation

R-38 (zones 1, 11-16)

R-30 (zones 2-10)


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Insulation

Prescriptive Wall Insulation

U-Factor = 0.065

R-15 in 2x4 wall cavity

Additional R-4 rigid over framing

members

or;

R-13 in 2x4 wall cavity

Additional R-5 rigid over framing

members


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Radiant Barriers

Prescriptive requirement in climate

zones 2-15


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HVAC Mandatory HERS testing for new

ducted systems unless ducts are in

conditioned space

Same applies if doing a duct extension

of 40+ feet of duct

New duct systems max 6% leakage

Existing duct systems

Max 15% leakage; or

Max 10% leakage to outside

HVAC bypass ducts not allowed

Minimum duct R-value = 6

Prescriptive duct R-Value = 8 (zones

11, 14-16)

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New efficiencies for DX air

conditioners

Implementation on Jan 1, 2015

Equipment < 65,000 Btuh 14

SEER

HVAC

2013 Title 24 Standards 33

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HVAC

Condensing units must be at least 5’

from dryer vent outlet

Whole house IAQ fans require HERS

testing and verification

Continuous operation of HVAC fan not

allowed as IAQ approach

Prescriptive whole house fan required

zones 8-14

Listed in CEC appliance directory

Provides a minimum of 2 cfm/sqft

of floor area

Impact of not doing up to 25% of

cooling


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Return Ducts

Mandatory return duct(s) sized per tables; or

Have HERS test for 350 cfm/ton & 0.58 w/cfm


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Single Duct

Cooling

Capacity

Minimum

Duct

Diameter

Minimum

Grill Area

1.5 tons 16” 500 in²

2 tons 18” 600 in²

2.5 tons 20” 800 in²

Multiple Duct

Cooling

Capacity

Minimum

Duct-1

Diameter

Minimum

Duct-2

Diameter

Minimum Grill

Area

1.5 tons 12” 10” 500 in²

2 tons 14” 12” 600 in²

2.5 tons 14” 14” 800 in²

3 tons 16” 14” 900 in²

3.5 tons 16” 16” 1000 in²

4 tons 18” 18” 1200 in²

5 tons 20” 20” 1500 in²

Domestic Hot Water

Gas or Propane water heaters serving

individual units

120 v outlet within 3 feet

Category III or IV (or B) straight

pipe vent

Condensate drain

Gas supply sized to deliver at least

200,000 Btuh (1-1/4” gas line?)

All hot water pipes ¾” or larger

insulated


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Types recognized by standards:

Standard Water Heater – Storage Gas

50 gallons, gas fired, <75,000 Btu/h

Large Storage Gas – either

>50 gallons, gas fired

OR

>75,000 Btu/h

Storage Electric

Heat Pump Water Heater with storage

Tankless Gas

Tankless Electric

Boiler and Storage Tank (mostly multifamily)

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Domestic Hot Water

Prescriptive Multi-family Central System

Demand control on recirculation

loops

8+ Dwelling units require a minimum

of two recirculation loops

Solar System

● 20% Net Solar Fraction (NSF) in

zones 1-9

● 35% NSF in zones 10-16

Cannot install electric DHW unless

● No natural gas available

AND

● Provide 50% NSF solar system


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Forms

Three versions of forms used for Prescriptive Compliance

CF1R — New Construction

● For New Construction Buildings

● For Additions > 1,000 sq ft

CF1R-ADD — Additions

CF1R-ALT — Alterations

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CF1R-PRF-01-E New Construction, Additions, Alterations,

E+A, E+A+A

Performance compliance method

Prescriptive Approach – all components

CF1R-NCB-01-E New Construction New constructed buildings and addition greater than

1,000 sf

CF1R-ADD-01-E Additions Addition less than 1,000 sf

CF1R-ALT-01-E Alterations Non HVAC Alterations

Prescriptive Approach – HVAC only

CF1R-ALT-02a-E HVAC alterations New ducts greater than 40 linear ft.

CF1R-ALT-02b-E HVAC alterations Equipment or component changeout

CF1R-ALT-02c-E HVAC alterations Equipment or component changeout with all new ducts

CF1R-ALT-02d-E HVAC alterations Entirely new or replacement system

CF1R-ALT-03-E HVAC alterations Paper version of CF1R-ALT-HVAC CZ 1, 3-7, 16

CF1R-ALT-04-E HVAC alterations Paper version of CF1R-ALT-HVAC CZ 2, 8-15

Prescriptive Worksheets – Envelope

CF1R-ENV-01-E Envelope worksheet EZ Frame - opaque

CF1R-ENV-02-E Envelope worksheet Area weighted average calculation

CF1R-ENV-03-E Envelope worksheet SHGC

CF1R-ENV-04-E Envelope worksheet Cool roof and SRI

Prescriptive Worksheets - Plumbing

CF1R-PLB-01-E Hydronic heating worksheet Hydronic heating system

Prescriptive Worksheets - Solar

CF1R-SRA-01-E Solar worksheet Solar ready areas

CF1R-SRA-02-E Solar worksheet Minimum Solar zone area




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Module Summary

New insulation Requirements

Tougher Window U-Factors

Tougher Window SHGCs

New HVAC Efficiencies (2015)

Mandatory HERS Testing

Solar In Multi-Family

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● Time Dependent Valuation

● Envelope

● Registration

● DHW

● Forms


HERS Measures


Updated Weather

New weather data used in performance

Uses NREL dataset from 2009

Data based upon historical average

New “reference cities”

Zone 6 - Torrance

Zone 8 – Fullerton

Zone 14 – Palmdale

Zone 15 – Palm Springs

Zone 16 – Blue Canyon

Climate zone boundaries remain the

same

Scope &

Applic

ation

Performance Modeling

ACM Manual dictates rules for modeling

Modeling uses new simulation engine CSE (California

Simulation Engine) from the CEC

Simulation is in 2 minute time steps for more accurate mass

simulations

Run times typically 30 times as long as prior

CEC maintains new Compliance Manager software that

provides Standard/Proposed building rules modeling

All software vendors must use the Compliance Manager

plug-in for Title 24 modeling


Scope &

Applic

ation

Photovoltaic Systems

Credit for Photovoltaic systems in Climate Zones 9-15

Requires selecting compliance with the 2015 Code (14 SEER

/ 11.7 EER AC)

User will input the DC rating for the system (kW)

Minimum 2kW system


Scope &

Applic

ation

Time Dependent Valuation (TDV) Energy

Valuations for electricity, natural gas,

and propane

(Energy units) x (applicable TDV

multiplier)

TDV multipliers vary by

energy type

climate zone

building type (e.g. low-rise

residential)

date and hour

Also the basis for Zero Net Energy


S

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Applic

ation


TDV and Electricity Time-of-Day Peaks

Source: Time Dependent Valuation (TDV) – Economics Methodology:

PG&E Code Change Proposal 2005 Title 24 Building Energy Efficiency Standards Update

With TDV value, a kWh saved at a high-cost peak hour is valued

more highly than a kWh saved during an off-peak hour

Monday Tuesday Wednesday Thursday Friday

Energ

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High-value energy (mid day, early afternoon)

Lower-value energy (early morning, late night)

TDV energy value

Flat energy value

Scope &

Applic

ation


TDV and Time-of-Year Peaks

160

140

120

100

80

60

40

20

0

Ja

n 1

Fe

b 1

Ma

r 1

Ap

r 1

Ma

y 1

Ju

n 1

Ju

l 1

Au

g 1

Se

p 1

Oct 1

Nov 1

Dec 1

kB

tu/k

Wh

Annual Residential Electricity — Climate Zone 12

Scope &

Applic

ation


Time Dependent Valuation

Values for TDV energy will increase

Significant increases in Electricity and Propane

Scope &

Applic

ation

Average TDV Multipliers

Year Natural Gas Propane Electricity

2008 1.48 1.90 4.09

2013 1.60 4.11 6.23

Increase 8% 116% 52%

Source: Ken Nittler, Nov 2011 CABEC conference


HVAC

Refrigerant Charge Verification or Charge Indicator Display -

HERS

Cooling Airflow Testing (>= 350 cfm/ton) - HERS

Fan Wattage Draw Test (<= 0.58 w/cfm) – HERS

High SEER/EER


Ducts and Air Handlers

Duct Leakage Testing (6%) - HERS

Low Leakage Air Handler (2%) - HERS

Higher Duct Insulation Levels – Not HERS

Sealed Ducts in Conditioned Space – HERS

Ducts in Conditioned except for 12’ - HERS


Building Leakage Testing

Blower Door Testing – HERS

Mechanical Ventilation will still be modeled, so going below

a certain amount will have no impact

5.0 ACH50 for single family ducted

7.0 ACH50 for multi-family ducted

4.4 ACH50 for single family unducted

6.2 ACH50 for multi-family unducted

54

Forms New CF-1R is now many more parts

Perf

orm

ance A

ppro

ach


Module Summary

New TDV Multipliers impact results

Revised modeling equations

New Forms

Perf

orm

ance A

ppro

ach

Ventilation Requirements





Ventilation Requirements

● ASHRAE Standard 62.2 Minimum Requirements

● Types of Mechanical Ventilation Systems

HERS Measures


ASHRAE Standard 62.2 Requirements

Primary Requirements

Local exhaust ventilation —

for control of indoor moisture

Whole-building ventilation —

for control of indoor air pollutants that

cannot be controlled at their source —

VOCs (volatile organic compounds)

Secondary Requirements New

Ventila

tion R

equirem

ents


62.2 Local Exhaust Minimum Requirements

Intermittent exhaust must be

designed to be operated as needed

by occupants

Continuous exhaust must be

installed to operate without

occupant intervention, but

with readily accessible

override control

Minimum Local Exhaust

Airflow Rates

Exhaust Intermittent Continuous

kitchen ≥ 100 cfm ≥ 5 AC/h

bathroom ≥ 50 cfm ≥ 20 cfm

New

Ventila

tion R

equirem

ents

LOCAL mechanical EXHAUST system shall be installed in each

kitchen and bathroom (for source control of moisture)


62.2 Whole-Building Ventilation Requirements

"A mechanical exhaust system, supply

system, or combination thereof shall be

installed for each dwelling unit to provide

whole-building ventilation with outdoor air

each hour at no less than the rate specified in

(Table 4.1a or Equation 4.1a) based on the

floor area of the conditioned space and

number of bedrooms."

Qfan 0.01Afloor 7.5 Nbr 1

(Occupancy is assumed to be two people in the master

bedroom and one person in every other bedroom.)

Whole-building Ventilation Rate

New

Ventila

tion R

equirem

ents


Basic Types of Whole-building Ventilation

Exhaust

Removes indoor air

Depressurizes house

Supply

Delivers outdoor air

Pressurizes the house

Balanced

Exhaust, supply fans fans move same

volume of air at same time

Does not affect indoor pressure

New

Ventila

tion R

equirem

ents


Module Summary

New mandatory feature:

meet ANSI/ASHRAE Standard 62.2-2004

Required: intermittent exhaust fans

in all bathrooms and kitchens

Required: mechanical whole-building

ventilation system capable of operating

continuously and delivering at least

minimum amount (cfm) of outdoor air

Continuous whole-building ventilation is

much more beneficial than intermittent

Three types of whole-building ventilation

are exhaust, supply, and balanced; each

has a different effect on indoor pressure

Efficacy of ventilation fans (cfm/W) should

be a key consideration in system selection

New

Ventila

tion R

equirem

ents

HERS Measures






HERS Measures

● Purpose of HERS Raters

● When is HERS Testing Required?

● Sampling

● HERS Features


Purpose of HERS Raters

HERS Raters are “Special Inspectors”

There are Special Inspectors for most any

trade you can think of.

Special Inspectors assist the local

enforcement agency (building department)

in enforcing the energy codes.

Special Inspectors are required when an

inspection is outside of the normal area of

expertise/ability of building inspectors.

Building departments have ultimate

authority over all Special Inspectors.

Special Inspectors have strict conflict of

interest rules that must be followed.

HE

RS

Measure

s


When Is HERS Testing Required

Duct Testing is required in all climate

zones

Refrigerant Charge Verification is required

in climate zones 2, 8-15.

Cooling airflow and watt draw verification

is required in climate zones 10-15.

HE

RS

Measure

s

New Construction Prescriptive Packages



HERS Testing is mandatory in all climate

zones for ducted systems.

HERS testing is only required if credit is

claimed for one or more of the other HERS

features (see list).

It is not possible to make a house comply

without any HERS features, since IAQ

testing is now required.

The Energy Budget is set by a standard

house that has HERS features.

HE

RS

Measure

s

New Construction Performance Approach



Duct Testing is required in all climate zones

when a major HVAC component is added or

replaced.

Refrigerant Charge Verification is required in

climate zones 2 and 8 through 15 when a

major HVAC component is added or replaced

in a split system with AC.

Airflow and fan watt draw verification is

required when an completely new system is

installed or an existing system is substantially

replaced in climate zones 10-15.

HE

RS

Measure

s

Alterations to Existing Homes


Sampling

Sampling is a method by which groups of homes can be

verified by a HERS rater without the HERS rater having to

test every single house.

Every house must first be self tested by the installing

contractor and then put into sample groups of 5 or 7,

depending on method.

The Rater randomly selects one house from the group and

performs third party verification on it. If it passes, all houses

in the group pass.

If it fails, a second house must be selected and tested.

If the second house fails all houses in the group must be

tested.

HE

RS

Measure

s


Sampling

Sampling for newly constructed homes is only allowed in

subdivisions and multifamily projects.

All homes in a group must have the exact same set of HERS

features.

Different plan types (models) can be in the same group as

long as the above is true.

All homes in a group must have had the same installing

contractor for the HERS features to be tested.

The first of each plan type (model) must be tested by the

HERS rater before that plan type can be included in any

sample groups.

HE

RS

Measure

s


Building Leakage Testing

Blower Door Testing – HERS

Not allowed on Multi-family

Mechanical Ventilation will still be modeled, so going below

a certain amount will have no impact

Ducted System (in unconditioned space)

5.0 ACH50 is the baseline for single family

7.0 ACH50 is the baseline for multi-family

Systems with no ducts in unconditioned space

4.4 ACH50 is the baseline for single family

6.2 ACH50 is the baseline for multi-family

70

HERS Features — Final Thoughts

HERS Testing requires very careful

coordination between the energy

consultant, the builder, the subcontractors

and the HERS Rater.

If a house absolutely can not pass a HERS

test, the compliance can be re-run without

that HERS test (except ducts and IAQ)

and other features can be used to make

the house pass.

HE

RS

Measure

s


Module Summary

HERS testing: field verifications and diagnostic

testing by CEC-approved Providers

New construction — Prescriptive approach:

Duct testing (all climate zones)

Watt draw verification (climate zones 10-15)

Refrigerant charge verification (zones 2, 8-15)

Cooling airflow and watt draw verification (climate zones 10-15)

New construction — Performance approach, HERS

testing is:

Mandatory

Probably most cost effective approach

For alterations — various tests for different HVAC

replacements or retrofits

HE

RS

Measure

s