D-5.i 

### APPENDIX D-5. DESIGN OPTION COMBINATIONS

TABLES

Table D-5.1 Complete List of Alternative Design Option Combinations - Electric Water Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-5.3 Table D-5.2 Complete List of Alternative Design Option Combinations - Gas Water Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-5.4D-5.1 

### APPENDIX D-5. DESIGN OPTION COMBINATIONS

This Appendix contains a list of all design option combinations for residential electric and gas-fired water heaters explored in order to develop the final set of designs used in the analysis to develop federal efficiency standards for such products.

A total of 23 alternative combinations were explored to develop a set of 6 electric water heater design option combinations. Table D-5.1 provides a list of all of the alternative combinations explored for electric water heaters.

A total of 87 alternative combinations were explored to develop a set of 8 gas water heaterdesign options. Table D-5.2 provides a list of all of the alternative combinations explored for gasfired water heaters.D-5.2 

### Table D-5.1 Complete List of Alternative Design Option Combinations - Electric Water Heaters Design Index Design Option 00 Existing Baseline
1 2003 Baseline 2 Heat Trap 3 Increased Insulation (2" foam) 3a Increased Insulation (2" foam) + Heat Trap 4 Increased Insulation (2.5" foam) 4a Increased Insulation (2.5" foam) + Heat Trap 5 Increased Insulation (3" foam) 5a Increased Insulation (3" foam) + Heat Trap
6 Insulted Tank Bottom 6a Insulated Bottom + Heat Trap 7 Insulated Bottom + Increased Insulation (2" foam) 7a Insulated Bottom + Increased Insulation (2" foam) + Heat Trap 8 Insulated Bottom + Increased Insulation (2.5" foam) 8a Insulated Bottom + Increased Insulation (2.5" foam) + Heat Trap 9 Insulated Bottom + Increased Insulation (3" foam) 9a Insulated Bottom + Increased Insulation (3" foam) + Heat Trap
10 Plastic Tank 10a Plastic Tank + Heat Trap 11 Plastic Tank + Increased Insulation (2" foam) 11a Plastic Tank + Increased Insulation (2" foam) + Heat Trap 12 Plastic Tank + Increased Insulation (2.5" foam) 12a Plastic Tank + Increased Insulation (2.5" foam) + Heat Trap 13 Plastic Tank + Increased Insulation (3" foam)
13a Plastic Tank + Increased Insulation (3" foam) + Heat TrapD-5.3 

### Table D-5.2 Complete List of Alternative Design Option Combinations - Gas Water Heaters Design Index Design Option 0 Existing Baseline
1 2003 Baseline 1a 2003 Baseline 245fa (Resistance to Flammable Vapors Ignition) 2 Heat Trap 3 Increased Insulation (2" foam) 3a Increased Insulation (2" foam) + Heat Trap 4 Increased Insulation (2.5" foam) 4a Increased Insulation (2.5" foam) + Heat Trap 5 Increased Insulation (3" foam) 5a Increased Insulation (3" foam) + Heat Trap 6 78% RE (Improved Flue Baffle) 6a 78% RE (Improved Flue Baffle) + Heat Trap 7 78% RE (Improved Flue Baffle) + Increased Insulation (2" foam) 7a 78% RE (Improved Flue Baffle) + Increased Insulation (2" foam) + Heat Trap 8 78% RE (Improved Flue Baffle) + Increased Insulation (2.5" foam) 8a 78% RE (Improved Flue Baffle) + Increased Insulation (2.5" foam) + Heat Trap 9 78% RE (Improved Flue Baffle) + Increased Insulation (3" foam) 9a 78% RE (Improved Flue Baffle) + Increased Insulation (3" foam) + Heat Trap 10 80% RE (Improved Flue Baffle) 10a 80% RE (Improved Flue Baffle) + Heat Trap 11 80% RE (Improved Flue Baffle) + Increased Insulation (2" foam) 11a 80% RE (Improved Flue Baffle) + Increased Insulation (2" foam) + Heat Trap 12 80% RE (Improved Flue Baffle) + Increased Insulation (2.5" foam) 12a 80% RE (Improved Flue Baffle) + Increased Insulation (2.5" foam) + Heat Trap 13 80% RE (Improved Flue Baffle) + Increased Insulation (3" foam) 13a 80% RE (Improved Flue Baffle) + Increased Insulation (3" foam) + Heat Trap 14 Electronic Ignition & Electromech. Flue Damper 14a Electronic Ignition & Electromech. Flue Damper + Heat Trap 14b Electronic Ignition & Electromech. Flue Damper + Heat Trap + 78% RE 14c Electronic Ignition & Electromech. Flue Damper + Heat Trap + 80% RE 15 Electronic Ignition & Electromech. Flue Damper + Increased Insulation (2" foam) 15a Electronic Ignition & Electromech. Flue Damper + Increased Insulation (2" foam) + Heat Trap 15b Electronic Ignition & Electromech. Flue Damper + Increased Insulation (2" foam) + Heat Trap + 78% RE 15c Electronic Ignition & Electromech. Flue Damper + Increased Insulation (2" foam) + Heat Trap + 80% RE 16 Electronic Ignition & Electromech. Flue Damper + Increased Insulation (2.5" foam) 16a Electronic Ignition & Electromech. Flue Damper + Increased Insulation (2.5" foam) + Heat Trap 16b Electronic Ignition & Electromech. Flue Damper + Increased Insulation (2.5" foam) + Heat Trap + 78% RE 16c Electronic Ignition & Electromech. Flue Damper + Increased Insulation (2.5" foam) + Heat Trap + 80% RED-5.4 

### Table D-5.2 Complete List of Alternative Design Option Combinations - Gas Water Heaters (cont’d) Design Index Design Option 17 Electronic Ignition & Electromech. Flue Damper + Increased Insulation (3" foam) 17a Electronic Ignition & Electromech. Flue Damper + Increased Insulation (3" foam) + Heat Trap 17b Electronic Ignition & Electromech. Flue Damper + Increased Insulation (3" foam) + Heat Trap + 78% RE 17c Electronic Ignition & Electromech. Flue Damper + Increased Insulation (3" foam) + Heat Trap + 80% RE 18 Side-Arm Design (Indirect Heating + IID + Metal Tank + 76% RE) 18a Side-Arm Design (Indirect Heating + IID + Metal Tank + 76% RE + Heat Trap) 18c Side-Arm Design (Indirect Heating + IID + Metal Tank + 76% RE+ Insulation 2") 18d Side-Arm Design (Indirect Heating + IID + Metal Tank + 76% RE+ Insulation 2" + Heat Trap) 18e Side-Arm Design (Indirect Heating + IID + Metal Tank + 76% RE+ Insulation 2.5") 18f Side-Arm Design (Indirect Heating + IID + Metal Tank + 76% RE+ Insulation 2.5" + Heat Trap) 18g Side-Arm Design (Indirect Heating + IID + Metal Tank + 76% RE+ Insulation 3") 18h Side-Arm Design (Indirect Heating + IID + Metal Tank + 76% RE+ Insulation 3" + Heat Trap) 19 Side-Arm Design (Indirect Heating + IID + Plastic Tank + 76% RE) 19a Side-Arm Design (Indirect Heating + IID + Plastic Tank + 76% RE + Heat Trap) 19c Side-Arm Design (Indirect Heating + IID + Plastic Tank + 76% RE+ Insulation 2") 19d Side-Arm Design (Indirect Heating + IID + Plastic Tank + 76% RE+ Insulation 2" + Heat Trap) 19e Side-Arm Design (Indirect Heating + IID + Plastic Tank + 76% RE+ Insulation 2.5") 19f Side-Arm Design (Indirect Heating + IID + Plastic Tank + 76% RE+ Insulation 2.5" + Heat Trap) 19g Side-Arm Design (Indirect Heating + IID + Plastic Tank + 76% RE+ Insulation 3") 19h Side-Arm Design (Indirect Heating + IID + Plastic Tank + 76% RE+ Insulation 3" + Heat Trap) 20 Side-Arm Design (Indirect Heating + IID + Metal Tank + 78% RE) 20a Side-Arm Design (Indirect Heating + IID + Metal Tank + 78% RE + Heat Trap) 20c Side-Arm Design (Indirect Heating + IID + Metal Tank + 78% RE+ Insulation 2") 20d Side-Arm Design (Indirect Heating + IID + Metal Tank + 78% RE+ Insulation 2" + Heat Trap) 20e Side-Arm Design (Indirect Heating + IID + Metal Tank + 78% RE+ Insulation 2.5") 20f Side-Arm Design (Indirect Heating + IID + Metal Tank + 78% RE+ Insulation 2.5" + Heat Trap) 20g Side-Arm Design (Indirect Heating + IID + Metal Tank + 78% RE+ Insulation 3") 20h Side-Arm Design (Indirect Heating + IID + Metal Tank + 78% RE+ Insulation 3" + Heat Trap)D-5.5 

### Table D-5.2 Complete List of Alternative Design Option Combinations - Gas Water Heaters (cont’d) Design Index Design Option 21 Side-Arm Design (Indirect Heating + IID + Plastic Tank + 78% RE) 21a Side-Arm Design (Indirect Heating + IID + Plastic Tank + 78% RE + Heat Trap) 21c Side-Arm Design (Indirect Heating + IID + Plastic Tank + 78% RE+ Insulation 2") 21d Side-Arm Design (Indirect Heating + IID + Plastic Tank + 78% RE+ Insulation 2" + Heat Trap) 21e Side-Arm Design (Indirect Heating + IID + Plastic Tank + 78% RE+ Insulation 2.5") 21f Side-Arm Design (Indirect Heating + IID + Plastic Tank + 78% RE+ Insulation 2.5" + Heat Trap) 21g Side-Arm Design (Indirect Heating + IID + Plastic Tank + 78% RE+ Insulation 3") 21h Side-Arm Design (Indirect Heating + IID + Plastic Tank + 78% RE+ Insulation 3" + Heat Trap) 22 Side-Arm Design (Indirect Heating + IID + Metal Tank + 80% RE) 22a Side-Arm Design (Indirect Heating + IID + Metal Tank + 80% RE + Heat Trap) 22c Side-Arm Design (Indirect Heating + IID + Metal Tank + 80% RE+ Insulation 2") 22d Side-Arm Design (Indirect Heating + IID + Metal Tank + 80% RE+ Insulation 2" + Heat Trap) 22e Side-Arm Design (Indirect Heating + IID + Metal Tank + 80% RE+ Insulation 2.5") 22f Side-Arm Design (Indirect Heating + IID + Metal Tank + 80% RE+ Insulation 2.5" + Heat Trap) 22g Side-Arm Design (Indirect Heating + IID + Metal Tank + 80% RE+ Insulation 3") 22h Side-Arm Design (Indirect Heating + IID + Metal Tank + 80% RE+ Insulation 3" + Heat Trap) 23 Side-Arm Design (Indirect Heating + IID + Plastic Tank + 80% RE) 23a Side-Arm Design (Indirect Heating + IID + Plastic Tank + 80% RE + Heat Trap) 23c Side-Arm Design (Indirect Heating + IID + Plastic Tank + 80% RE+ Insulation 2") 23d Side-Arm Design (Indirect Heating + IID + Plastic Tank + 80% RE+ Insulation 2" + Heat Trap) 23e Side-Arm Design (Indirect Heating + IID + Plastic Tank + 80% RE+ Insulation 2.5") 23f Side-Arm Design (Indirect Heating + IID + Plastic Tank + 80% RE+ Insulation 2.5" + Heat Trap) 23g Side-Arm Design (Indirect Heating + IID + Plastic Tank + 80% RE+ Insulation 3") 23h Side-Arm Design (Indirect Heating + IID + Plastic Tank + 80% RE+ Insulation 3" + Heat Trap)