APPENDIX 5A. AHAM ENGINEERING ANALYSIS QUESTIONNAIRE

TABLE OF CO NTENTS

5A.1 RESIDENTIAL DEHUMIDI FIERS

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- iAPPENDIX 5A. AHAM ENGINEERING ANALYSIS QUESTIONNAIRE

5A.1 RESIDENTIAL DEHUMIDI FIERS

QUESTIONS FOR ENGINE ERING ANALYSIS

DOE would like to confirm information on the incremental costs of increasing product efficiency by understanding the design options involved in the efficiency improvement.

1. Which design features impacting energy use are generally incorporated into a “base line” dehumidifier in the following product classes:

a. Portable, 35.00 pints/day or less? b. Portable, 35.01 to 45.00 pints/day?

c. Portable, 45.01 to 54.00 pints/day? d. Portable, 54.01 to 75.00 pints/day?

e. Portable, greater than 75.00 pints/day? f. Whole

- home?

2. Are th ere other product classes that DOE should consider? Should DOE consider combining or splitting any of these product classes?

3. DOE is proposing to analyze the following efficiency levels for a subset of the proposed product classes that represent the great est number of available models:

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- 1Level Efficiency Level Source Efficiency Levels ( liters/kWh )
Portable, 35.01

– 45.00 pints/day Portable, 45.01

– 54.00 pints/day Portable, 54.01

– 75.00 pints/day Whole

- Home

B aseline DOE Standard 1.50 1.60 1.70 2.50 †

1 ENERGY STAR* (Max Available for 35.01

– 45.00 pints/day, Gap Fill for 45.01

– 54.00 pints/day) 1.62 1.70 1.85 2.80

2 Gap Fill (Max Available for 45.01

– 54.00 pints/day -- 1.80 2.10 3.50

3 Maximum Available -- -- 2.47 4.17

* ENERGY STAR qualification criteria effective October 1, 2012, require all portable and whole

- home dehumidifiers less than 75 pints per day to have an EF of at least 1.85 liters/kWh, which is greater than the maximum available efficiency of 35.01

– 45.00 pint s/day units. U nits with 75

– 185 pints/day capacity must have an
E F of at least 2.80 liters/kWh, while d ehumidifiers with a capacity greater than 185 pints/day are excluded. † The baseline efficiency for th e whole

- home product class is specified as the DOE s tandard effective October 1, 2012, for dehumidifiers with a capacity greater than 75.00 pints/day.

1. Do you agree with the proposed efficiency levels?

a. Do you believe that the gap

- fill efficiency levels defined by DOE for portable 45.01

- 54.00 pints/day, 54.01

- 75.00 pints/day

, and whole

- home dehumidifiers are appropriate ? If not, can you suggest appropriate gap

- fill values? b. For the 35.01

- 45.00 pints/day and 45.01

- 54.00 pints/day product classes, DOE is aware that some dehumidifier models have been added to the ENERGY STAR product database that have a 1.85 EF, although the products may not yet be available for purchase on the market. Should DOE adjust the max

- tech efficiency levels in these product classes to 1.85 EF?

2. If you believe th at other portable deh umidifier product classes should be analyzed, can you suggest baseline, max

- tech , and if necessary, gap fill efficiency levels for those product classes?

3. Which design changes are associated with converting a baseline portable 35 .01

- 4 5.00 pints/day dehumid ifier ( 1. 5 0 EF ) to efficiency level 1 (the maximum available level (1.62 or 1.85 EF))? Are these design changes comparable for portable dehumidifiers with capacities of 35.00 pints/day or less ? What are the costs of the individual design options selected?

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- 24. Which design changes are associated with converting a baseline portable 45 .01

- 54 .00 pints/day dehumidifier ( 1. 6 0 EF ) to efficiency level 1 (1.70 EF)? To the maximum available level ( 1.80 or 1.85 EF )? What are the costs of the individual design options sel ected?

5. Which design changes are associated with converting a baseline portable 54 .01

- 7 5.00 pints/day dehumidifier ( 1. 7 0 EF ) to efficiency level 1 (the ENERGY STAR level (1.85 EF))? To efficiency level 2 (2.10 EF)? To the maximum available level ( 2.47 EF )? Are these design changes comparable for portable dehumidifiers with capacities greater than 75.00 pints/day ? What are the costs of the individual design options selected?

6. Which design changes are associated with converting a baseline whole

- home dehumidif ier ( 2.50 EF ) to efficiency level 1 (the ENERGY STAR level for 75 to 185 pints/day (2.80 EF))? To efficiency level 2 (3.50 EF)? To the maximum available level ( 4.17 EF )? Are these design changes comparable to those used for portable units with capacity gre ater than 75 pints/day ? What are the costs of the individual design options selected?

7. Are there fundamental differences between required design changes that could make the cost increment higher for some product classes than others, in particular between t he portable greater than 75.00 pints/day and whole

- home product classes?

8. Do you believe that the DOE dehumidifier test procedure that will be in effect at the time of any new dehumidifier standards (10 CFR Part 430, Subpart B, Appendix X1) is appropriate for measuring the energy use of whole

- home dehumidifiers? If not, can you suggest an alternative test method?

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