Oregon Energy Star Homes Measure Update

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Oregon Energy Star Homes Measure Update

New Measure Proposal April 22nd, 2014

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Measure background• Measure Name: Energy Star Homes BOP1(Ducts

Inside, Equipment Upgrade, Envelope), BOP2• Measure Type: UES• Measure Category: Proven• Measure Sector: Residential• Sunset Date: April, 2014• Reason for Update: Update to SEEM94,

Calibration, ProCost Template

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Staff Highlighted Areas• None.

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Measure Summary Baseline

OR Code Table N1101.1(1)

ORBOP1 Ducts Inside

ORBOP1 Equipment Upgrade

ORBOP1 Envelope Path

ORBOP2 Zonal

ComponentGlazing % <21% <21% <21% <21%Vertical Glazing U-Val 0.35 U-0.30 U-0.30 U-0.25 U-0.22

Flat Ceilings U-0.031 / R-38R-49 w/ R-21 at edge

R-49 w/ R-21 at edge

R-49 w/ R-21 at edge

R-60 w R-45 edge

Vaulted Ceilings U-0.042 / R-30 R-30 R-30 R-30 R-38Walls U-0.06 / R-21 std R-21 Adv R-21 Adv U-0.043, R21&R5 U-0.043, R21&R5Floors U-0.028 / R-30 R-30 R-30 R-30 R-38

Slab F-0.52 / R-15 perimR10 full+R15 perim2'

R10 full+R15 perim2'



Basement Walls 7' F-0.565 / R-15 R-19 R-19 R-19 same as code

House ACH 6 ACH 50 4 ACH50 4 ACH50 4 ACH5070% HRV, 2.5 ACH50

Furnace AFUE 0.9 0.92 0.94 0.92 naHeat Pump HSPF 8.5 8.5 / 9.0 8.5 / 9.0 8.5 / 9.0 naCooling SEER 13 13 / 14.5hp 13 / 14.5hp 13 / 14.5hp naDHW Tank EF (gas/elec) .59 / .9 0.62 / 0.93 0.82/ 2.0 0.62 / 0.93 0.93

Lighting 50% CFL, 75 % CFL (Zonal)

80% CFL 80% CFL 80% CFL 100 % CFL

Program Specs

Nominal Value

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Measure Update Summary• Simulations conducted in SEEM 94 • RTF approved new construction calibration applied• Expanded list of prototypes from 3 to 5

• As per NEEA 2007 New Homes Characterization study, 16 % of homes are built slab on grade.

Current Prototypes Proposed PrototypesSingle Family 1344 Crawl Single Family 1344 CrawlSingle Family 2200 Crawl Single Family 1344 SlabSingle Family 2688 Basement Single Family 2200 Crawl

Single Family 2200 SlabSingle Family 2688 Basement

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Impact of EISA Lighting Standards• Assumption: EISA reduces wattage of baseline

incandescent bulbs by an average of 28 %.• 60 W bulb 43 W

• All other calculation details kept constant.

• As per latest RTF staff analysis, CFLs have no incremental cost.

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DHW Update• Linked saving for tank upgrade and low flow

appliance to respective workbooks.

• Slight increase in savings (approx. 400 500 kWh)

• Cost remains relatively constant ($ 100)

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Furnace Fan CFM/ Ton• Manufacturer suggested flow rate is 400 cfm/ ton

(previous assumption)

• A 73 % adjustment factor applied to suggested flow rate.

• NEEA New Homes Characterization study (2007) conducted by RLW.

• Makes a difference of approximately 100 kWh on an average.

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Incremental Cost Accounting• EUL for new homes is 45 years.

• Individual measures have EUL < 45 years. The savings and cost for these measures recur after their EUL.

• This lowers TRC.

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BOP 1 Equipment Path Energy Savings

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BOP 1 Equipment Path Incremental Cost

$-

$500

$1,000

$1,500

$2,000

$2,500

$3,000

$3,500

CZ1 CZ2 CZ3 CZ1 CZ2 CZ1 CZ2 CZ1 CZ2 CZ3 CZ1 CZ2 CZ1 CZ2

HZ1 HZ2 HZ3 HZ1 HZ2 HZ3 HZ1 HZ2 HZ3

Gas Furnace with AC Gas Furnace, No AC Heat Pump

Incr

emen

tal C

ost

Existing Proposed

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BOP 1 Equipment Path TRC

-

0.50

1.00

1.50

2.00

2.50

3.00

3.50




TRC

Existing Proposed

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BOP 1 Ducts Inside Path Energy Savings

-

1,000

2,000

3,000

4,000

5,000

6,000




kWh

Savi

ngs

Existing Proposed

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BOP 1 Ducts Inside Path Incremental Cost

$-

$500

$1,000

$1,500

$2,000

$2,500

$3,000




Incr

emen

tal C

ost

Existing Proposed

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BOP 1 Ducts Inside Path TRC

0

1

2

3

4

5

6




TRC

Existing Proposed

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BOP 1 Envelope Path Energy Savings

-

500

1,000

1,500

2,000

2,500

3,000

3,500

4,000

4,500

5,000




kWh

Savi

ngs

Existing Proposed

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BOP 1 Envelope Path Incremental Cost

$-

$500

$1,000

$1,500

$2,000

$2,500

$3,000

$3,500

$4,000

$4,500




Incr

emen

tal C

ost

Existing Proposed

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BOP 1 Envelope Path TRC

0

0.5

1

1.5

2

2.5

3




TRC

Existing Proposed

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BOP 2 Energy Savings

HZ1 HZ2 HZ3Zonal

-

1,000

2,000

3,000

4,000

5,000

6,000

7,000

Existing Proposed

kWh

Savi

ngs

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BOP 2 Incremental Cost

$-

$1,000

$2,000

$3,000

$4,000

$5,000

$6,000

$7,000

HZ1 HZ2 HZ3

Zonal

Incr

emen

tal C

ost

Existing Proposed

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BOP 2 TRC

-

0.5

1.0

1.5

2.0

2.5

3.0

HZ1 HZ2 HZ3

Zonal

TRC

Existing Proposed

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Sunset Date• Conversations with NW Energy Star, Oregon

Building Codes Division indicate that no upcoming code change for at least two years.

• Federal std for water heaters will necessitate a change in the DHW component (SOURCE)

• Proposed sunset date: 1 year from now. • Staff will update the DHW component.

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Proposed Decision“I __________ move that the RTF:

• Approve the three BOP1 (Equipment, Ducts Inside, and Envelope) and BOP2 (Zonal) Energy Star Home Option UES values for all Oregon climate zones,• and set the sunset date to April 30, 2015.

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Washington Energy Star Homes Measure Update

New Measure Proposal April 22nd, 2014

25Washington 2012 New Construction Code Now Active• WA 2012 residential code became active on July 2013.

• WA 2012 energy code has a set of core criteria that a builder must meet and attain 1.5 points from a set of optional criteria.

• WA 2012 code aims to transform the market by encouraging:

• Heat Pumps to be the primary electric heating system• HVAC systems to be located inside the thermal envelope

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WA 2012 Baseline Prototypes• Analysis done by Ecotope (RTF Meeting, December

2013) used as basis for prototype selection.

• Baseline prototype selected based on three criterion:• Mean Energy Consumption.• Low Incremental Cost.• Anecdotal evidence from the field.

• WA Department of Commerce, CleaResult, Ecotope Consulting were consulted in this process.

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WA 2012 Baseline Prototypes (Contd.)

Option Proposed WeightingExhaust Fan, 95 AFUE, DHW-Low Flow-Better Tank 40%Ducts Inside, DHW-Low Flow-Better Tank 40%Gas Tankless DHW 20%

Heat Pump 8.5 HSPF; DHW-Low Flow-Better Tank 100%Zonal Envelope Option; DHW-Low Flow-Better Tank 100%

Gas Furnace - CAC;Gas Furnace No AC

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Status of Current Energy Star Specifications• Current Energy Star specifications were drafted for

the WA 2009 code.• WA 2012 residential code in most cases meets, and in

some cases exceeds current Energy Star code.• Potential for savings via Energy Star as it stands are

minimal.

• NW Energy Star team intends to update the current Energy Star specifications within the next month.

• Energy Star team will develop reference design homes that would consume at least 12 % less energy than code homes.

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Staff Proposal• Deactivate current WA Energy Star Measures.

• Staff checked with WA State Dept. of Commerce (Chuck Murray), builders cannot build to 2009 code anymore.

• Staff will characterize the WA Energy Star Measures once specifications are finalized.

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Proposed Decision“I __________ move that the RTF:

• Deactivate all current WA Energy Star New Construction UES measures.

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Backup Slides• Effect of Calibration on Savings

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BOP 1 – Ducts Inside Path

0

500

1000

1500

2000

2500

3000

3500

4000

HZ1_CZ1 HZ1_CZ2 HZ1_CZ3 HZ2_CZ1 HZ2_CZ2 HZ2_CZ3 HZ3_CZ1 HZ3_CZ2 HZ3_CZ3

kWh

No Calibration Phase 1 Phase 2 Both

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BOP2 - Zonal

0

1000

2000

3000

4000

5000

6000

HZ1 HZ2 HZ3

kWh

No Calibration Phase 1 Phase 2 Both

Documents

Oregon Energy Star Homes Measure Update