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A Strategic Simulation Briefing Book - HDF: Housing Development ...

A Strategic Simulation Briefing Book - HDF: Housing Development ...

2 EFFICIENCY CASE STUDY

2 EFFICIENCY CASE STUDY #2: hypothetical home in Essex Initial condition Recommended upgrades • Built 1990 • 2 stories, 2,400 square feet • Oil boiler and water heater installed 2007 • Double pane windows, insulated walls, R- 27 insulation in attic • Married couple with one child • Install CFLs in high-use fixtures • Programmable thermostat • Add R-25 floor insulation; upgrade attic insulation to R-49 • Air sealing for 25% air leakage reduction • When replacing clothes washer and oil water heater, choose Energy Star models (cost is incremental cost of Energy Star only) • When replacing refrigerator, choose 15% better than Energy Star (cost is incremental cost only) Source: Lawrence Berkeley National Labs, Home Energy Saver model

27 2 EFFICIENCY CASE STUDY #2: hypothetical home in Essex Total cost of retrofits $4,821 Annual energy savings $964 Payback time 5 ROI 20% Avoided emissions / year 7,453 lbs CO 2 Fuel oil savings / year Electricity savings / year 246 gallons 1,388 kWh Estimated cost of upgrades $4,821 Source: Lawrence Berkeley National Labs Home Energy Saver model. Average of cost range used for all improvements.

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