An analysis of office buildings that have earned the Energy Star label show that they cost $1.20 per sq ft to operate, compared with an average U.S. office building that operates at about $2.00 per sq ft.
Savings of $160,000/year for 200,000 ft 2 office building
Most packaged Energy Upgrades will have a Simple payback of 4-6 years for the investment cost
Solar cells are one of the most environmentally safe ways of generating electricity
Installing a 1 kW photovoltaic system reduces CO 2 by over 2600 lbs annually
Prices are expected to decrease significantly as manufacturing techniques improve
Brand Power Output Warranty Retail Price System Cost Siemens Solar 63W per panel 25 years $436 / panel 30.1 cents/kWh BP Solar 75W per panel 20 years $499 / panel 34.2 cents/kWh AstroPower 75W per panel 20 years $400 / panel 29.7 cents/kWh
30% tax credit of installed costs (no limits in new bill)
New building energy efficiency credit:
$1.80/ft 2 if Whole building is 50% more efficient than basecase based on Energy Model
Partial credits for building subsystems (Lighting, HVAC and Hot Water, or Building Shell)
Existing building energy efficiency credit:
$1.80/ft 2 if Lighting, or HVAC and Hot Water, or Building Shell is retrofit or replaced with a new system that is 50% more efficient than allowable by ASHRAE 90.1-2001.
Lighting is retrofit or replaced with a new lighting system that is 25% more efficient than allowable by ASHRAE 90.1-2001.
Existing Building Energy Upgrade Project * with tax credits Description First Cost Annual Savings Payback Lighting Upgrade $65,000 $21,000 3.1 yr Install programmable thermostats $12,000 $8,500 1.4 yr Chiller Replacement $95,000 $27,000 3.5 yr Improve Boiler Combustion efficiency $1,500 $2,000 0.8 yr Insulate hot water pipes $3,000 $500 6.0 yr Install door thresholds $450 $140 3.2 yr Install Variable Speed Drives on fans $24,500 $9,500 2.6 yr Replace standard efficiency motors for chilled water pumping $2,300 $550 6.2 yr * Install 10 kW photovoltaic array $40,000 $1,600 25.0 yr Total $243,750 $70,790 3.4 yr