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1 This presentation is posted for public use. ACEEE does not endorse any product or service. ACEEE accepts no responsibility for any facts or claims this presentation may contain.

2 Hot Water Forum 2012: Northern Climate Specification May 21, NORTHWEST ENERGY EFFICIENCY ALLIANCE

3 Northern Climate Session Northern Climate Specification Overview Lab Testing Field Testing 2

4 Hot Water Forum 2012: Northern Climate Specification Overview Dave Kresta May 21, NORTHWEST ENERGY EFFICIENCY ALLIANCE

5 Agenda Northern Climate Specification intro Northern Climate EF Northern Climate Delivery Rating The role of ducting Other tidbits 4

6 Market Transformation Vision Customer savings and satisfaction Widespread adoption, Manufacturer support Federal Standards 5

7 Key Strategies Right Product Lower Costs Supply-chain engagement Buying experience Federal standards Northern Climate Specification Move beyond niche product, incentives, explore financing/ leasing options Upstream incentives, training Consumer and retail education, regional messaging Drive adoption, influence test procedures and rating systems 6

8 Northern Climate Specification WHY? Temperature-dependent performance in HPWHs WHAT? HOW? For? Climate-sensitive ratings; features for reliable savings, customer comfort in cooler climates Tiered product qualification, test procedures. Manufacturers; utility programs; DOE/EPA 7

9 Overview of Content Scope: Integrated units only Product Qualification tiers 1,2,3 Northern Climate Energy Factor Northern Climate Delivery Rating Minimal electric element usage Sound levels Compressor shut-down/notification Ducting Condensate Management Air filters: maintenance/notification Freeze Protection Updated: Nov

10 Northern Climate Product Tiers Max 65dbA NC EF 1.8 Energy Star Condensate mgmt Electric heating restrictions Compressor shut-down alarm Exhaust duct option Interior installs Max 60dbA NC EF 2.0 Energy Star Condensate mgmt Electric heating restrictions Compressor shut-down alarm Intake/ Exhaust option Interior installs Max 55dbA NC EF 2.4 Energy Star 9 Tier 1 Tier 2 Tier 3

11 Northern Climate Energy Factor Concept: Energy Factor representative of performance for equipment installed garages and unheated basements in northern climates. Process: Leverage existing EF DOE test (at 67 F) with additional lower temperature metrics and calculations to determine EF NC 10

12 Northern Climate EF (continued) Conduct additional EF test at 50 F ambient, 50 F inlet Determine compressor shut-off temp, tank UA, and EF with resistance element Use weighted distribution of temperature bins Calculate single EF NC value 11

13 Northern Climate Delivery Rating Concept: Rate units on ability to deliver hot water in cool ambient conditions while maintaining high efficiency. Not used to determine Northern Climate Spec compliance, but rather a sizing aid for contractors and consumers. Metric: # of showers provided until the outlet temperature gets too cold (105 F) or any resistance element turns on. Setup: T ambient = 50,T set point = 120 F, T inlet water = 50 F Draw profile: 8 mins at 2gpm, 5 min off, repeat 12

14 13 Sample Delivery Rating test

15 The role of ducting for HPWHs 14 Northern Climate Spec does not require use of ducting tier 2 requires a ducting option for use in conditioned spaces Comfort AND performance are drivers Modeling indicates additional savings in all but the coldest climates. More.in the whole home impacts session

16 Other tidbits for tiers 2 and 3 Minimal usage of electric heating During the first draw of the standard DOE First Hour Rating Test, the electric resistance heating element shall not be turned on until at least 66% of the tank s measured water volume has been withdrawn. 15

17 16 First-hour rating/electric element turn on

18 Other tidbits for tiers 2 and 3 continued Notification of compressor shut down or failure Revert to normal operating mode after 48 hours if customer overrides heat-pump (and conditions allow) Compressor shut-down and alarm in event of condensate drain blockage 17

19 Qualification Process Product Assessment worksheet Northern Climate EF calculator NEEA managed Qualified Products list 18

20 Thank you Dave Kresta, (503) NORTHWEST ENERGY EFFICIENCY ALLIANCE

21 20 Additional Slides

22 Product Tiers Tier 1 Minimum Northern Climate EF Minimum Northern Climate Features 1.8 ENERGY STAR compliance Minimum supported installation locations Semi-conditioned Unconditioned Sound levels dba < 65 Tier Tier 1 plus: Minimal use of electric heating elements* Freeze protection Exhaust ducting option Compressor shutdown/notification 10 year Warranty Condensate Mgmt Conditioned Semi-conditioned Unconditioned dba < 60 Tier Tier 2 plus: Intake ducting option Air Filter Mgmt Conditioned Semi-conditioned Unconditioned dba < 55 21

23 22 RTF Provisional Savings Table