The requested URL /index.php?option=com_virtuemart&Itemid=227 was not found on this server.For Residents » Save Energy It takes just a little energy to save on energy costs. If you pay attention to the little things, the money you save will add up in a big way. The chart below gives you a good idea of energy costs per electrical appliance, kind of like nutrition fact labels on food. See also our Twelve Easy Ways to Save Energy. 1.5 kWh per hour Baseboard heater (six foot unit) (250 W/foot) Heat Pump heat strips 10 kWh per hour w/fan 10.5 kWh per hour w/fan Heat Pump w/o heat strips (1.8 COP)*** 2.93 kWh per hour 9.77 kWh per hour Window/wall (8kBtu) (120V-12 EER) 0.73 kWh per hour 1.8 kWh per hour Central (3 ton-12 SEER) 3.0 kWh per hour 0.2-0.4 kWh per hour $0.03 - $0.05 per hour 0.03 kWh per hour Less than $0.03 per hour 0.075 kWh per hour 380 - 500 kWh per month $41.00- $55.00 per month

Instantaneous (110 v 29 amp) @1gpm 70'F $41.00 - $55.00 per month Instantaneous (240 v 50 amp) @2.5 gpm 83'F 12 kWh per hour 2.3 kWh per hour 1-1.5 kWh per hour $0.11 - $0.17 per hour 6 kWh per hour cleaning 0.12 kWh per 5 min $0.01 per 5 min 0.12 kWh per brew Coffee maker/brew, warmer on 0.4 kWh per hour Dishwasher: normal cycle (not including hot water) 1 - 2.17 kWh per load $0.11 - $0.24 per load Dishwasher: Energy saver cycle 0.5 kWh per load 0.04 kWh per use 0.75 kWh per hour Waffle iron, 4 servings 0.33 kWh per use Refrigerator (frost-free), 15 cu. Ft. (1996 unit) 150 kWh per month Freezer (manual defrost), 15 cu. Ft. 90 kWh per month Newer Units - Energy Star Refrigerators Energy Star Refrigerator, 14 cu. Ft. 34.5 kWh per month $ 3.80 per month Energy Star Refrigerator (frost-free), 17 cu. Ft. 35 kWh per month $ 3.85 per month

Energy Star Refrigerator (frost-free), 19 cu. Ft. 46 kWh per month $ 5.06 per month Energy Star Refrigerator (Side by Side) 21 cu. Ft. 51 kWh per month $ 5.61 per month Energy Star Refrigerator (frost-free) 24 cu. Ft. 54 kWh per month $ 5.94 per month Energy Star Refrigerator (Side by Side) 25 cu. Ft. 60 kWh per month $ 6.60 per month 0.48 kWh per hour 40" - 49" Plasma 0.016 kWh per hour Less than $0.01 per hour 40" - 49" LCD 0.012 kWh per hour 0.24 kWh per hour 40" - 49" DLP 0.2 kWh per hour 30" - 36" Tube 0.12 kWh per hour 25" - 27" Tube 0.09 kWh per hour 28.8 kWh per month 0.02 kWh per hour 0.15 kWh per hour 0.21 kWh per hour 0.06 - 0.25 kWh per hour $0.01 - $0.03 per hour Desktop Computer on sleep/standby mode 0.001 - 0.006 kWh per hour 0.02 - 0.05 kWh per hour Monitor - 17" CRT 0.08 kWh per hour Monitor - 17" LCD

0.04 kWh per hour Speakers (25 Watts x 2) normal volume 0.05 kWh per hour Incandescent bulb (40 W) Incandescent bulb (60 W) 0.06 kWh per hour Incandescent bulb (75 W)wet dry vax vacuum cleaner Incandescent bulb (100 W)philips vacuum cleaner cost 0.1 kWh per hourlego marvel vacuum cleaner Incandescent bulb (150 W) Compact fluorescent (8 W) equivalent to 25 W incandescent 0.008 kWh per hour Compact fluorescent (11 W) equivalent to 40 W incandescent 0.01 kWh per hour Compact fluorescent (15 W) equivalent to 60 W incandescent 0.015 kWh per hour Compact fluorescent (20 W) equivalent to 75 W incandescent Compact fluorescent (27 W) equivalent to 100 W incandescent

0.027 kWh per hour Compact fluorescent (38 W) equivalent to 150 W incandescent 0.038 kWh per hour 0.3 kWh per hour Clothes dryer (light load vs. heavy load) 2.5 - 4 kWh per load $0.28 - $0.44 per load Warm Wash, cold rinse 2.3 kWh per load Hot wash, warm rinse 6.3 kWh per load 1.08 kWh per hour 2 - 4 kWh per month $0.22 - $0.44 per month Night light (4w on 12-hours/day) 1.44 kWh per month 0.05 - 1.21kWh per hour $0.01 - $0.13 per hour Sweep pump (3/4 hp) 0.56 kWh per hour Filter pump (1-1/2 hp) 1.12 kWh per hour Filter pump (2 hp) Electric heater (1500 W) Electric heater (5500 W) 5.5 kWh per hour 1 kWh per hour 0.46 kWh per hour Sleep Apnea Machine (CPAP) * Estimated energy use is based on average operation conditions. Individual use may vary. ** Estimated costs based on $0.11 per kWh *** COP = Coefficient of Performance. An electric resistance heater has a COP of 1

GPM - Gallons per minute SEER - Seasonal Energy Efficiency Ratio (efficiency given to central air conditioning) EER - Energy Efficiency Ratio (efficiency given to window/wall air conditioners) Solar and Green Power Relationship Between Watts and dBs Q: Can someone please explain the relationships between watts and dB's to me? I am new to audio and wish to acquire a better understanding of power/watts, etc. A: Decibel (dB) (1) a logarithmic scale used to denote a change in the relative strength of an electric signal or acoustic wave. It is a standard unit for expressing the ratio between power and power level. Using the logarithmic relationship for power PdB = 10*log[Pout/Pin] , a doubling of electrical power only yields an increase of +3 dB. Increasing the power tenfold will yield an increase of +10 dB and is a doubling of perceived loudness. The decibel is not an absolute measurement, but indicates the relationship or ratio between two signal levels. (2) SPL (sound pressure level) can be measured in dB.

0 dB represents the threshold of normal human hearing, 130 dB represents the threshold for pain, 140 dB causes irreparable hearing damage, and 150 dB can cause instant deafness, anything greater than about 192 dB can kill you. Jet engine at 3m Accelerating motorcycle at 5m Pneumatic hammer at 2m Residential area at night Human breathing (at 3m) Threshold of hearing (good ears) The relationship between sound amplitude and actual loudness is complex. Loudness is a perceptual dimension while sound amplitude is physical. Since loudness sensitivity is closer to logarithmic than linear in amplitude (especially at moderate to high loudnesses), we typically use decibels to represent sound amplitude, especially in spectral displays. "A","B","C" and Linear are the standard weighting networks available. These are frequency filters that cover the frequency range of human hearing (20 Hz to 20 kHz)."A" weighting is the most commonly used filter in both industrial noise applications (OSHA) and community noise regulations.

"A" weighted measurements are often reported as dBA. The "A" weighted filter attempts to make the dosimeter respond closer to the way the human ear hears. It attenuates reduces the frequencies below several hundred hertz as well as the high frequencies above six thousand hertz. "B" weighting is similar to "A" weighting but with less attenuation. The "B" weighting is very seldom, if ever, used. "C" weighting provides a fairly flat frequency response with only slight attenuation of the very high and very low frequencies. "C" weighting is intended to represent how the ear perceives sound at high decibel levels and is often used as a "flat" response when Linear is not available. "C" weighted measurements are often reported as dBC. Linear is thought of as having a flat frequency response curve over the entire measurement frequency range. Linear is most commonly found on upper model sound level meters and is typically used when performing octave band filter analysis. Watt - a unit of electrical power.