Saving Energy in Your Home Presented by Jim Phillips, P.E., CEM, CEA, GBE VP - Independent Energy Alternatives
Introduction The Cost of Energy – how to read your electric, gas, & water bills Energy Wasted – how energy is lost in your home (envelope, appliances, control) Measuring Energy –devices that let you see how much electricity is used by appliances Changing Behavior – thinking & becoming energy efficient – what you can do to lower energy usage or eliminate wasted energy Measuring Results & Calculating Savings – a simple excel program to calculate energy & dollar savings 2
The Cost of Energy – reading your energy bills Electric Meters 3
The Cost of Energy – reading your energy bills Electric Meters 4
The Cost of Energy – reading your energy bills Electric Bill 5
Residential Electric Energy Usage – one week
The Cost of Energy – reading your energy bills Gas Meter
The Cost of Energy – reading your energy bills Gas Meter 8
The Cost of Energy – reading your energy bills Gas Bill 9
The Cost of Energy – reading your energy bills Water Meter 10
The Cost of Energy – reading your energy bills Water Bill 11
Energy Wasted Building Envelope – Leaks & Insulation ◦ Attic/Roof/Floor Insulate attic to R-49 (14”) – each inch to R-49 saves approx. $350/yr Install Radiant Barriers (saves 15% of cooling bill) Insulate Peer&Beam floors to R-25 (6”) ◦ Windows/Doors Seal all cracks – a ǒ” wide 6’ long crack costs about $28 a year in lost AC cooling. ◦ Walls Insulate walls to R-13 (3”) Install electrical outlets & switches on exterior wall with sealers 12
Energy Wasted Building Envelope – Insulation ◦ Research has found that, due to improper installation (gaps and misalignment), Batt Insulation often achieves less than one half of its rated R-value. ◦ Insulation must be in contact with the attic or wall surface to be insulated. Chimney – chimney balloon keeps warm air from escaping up the chimney. Windows – mist window and apply bubble wrap to the inside of the pane (bubbles against the glass). Pools – install solar pool covers to reduce evaporation and heat pool 13
Energy Wasted Building Envelope – Leaks & Insulation ◦ Piping & Ducts Water Leaks – a slow drip = 36 gallon per day, costing approx. $187 annually for cold water; $270/yr for gas heated hot water; $444/yr for electric hot water A leak of 1 drip per second cost $1 per month Low Flow Showers = 2.2 gpm – saves approx. 40% Aerated faucets reduce water flow to 2.2 gpm or less Air Duct Leaks – the loss of heated or cooled air (velocity x area x delta T x energy cost = Dollars lost) Air Duct Insulation – eliminates the loss of heated or cooled air into the attic or under the home (1/R x area x delta T x energy cost = Dollars lost) 14
Energy Wasted Building Envelope – Leaks ◦ Ducts Leakage increases required HVAC size by about 40% Supply leaks draw in hot, moist air, causing mold, and creating negative pressures Return leaks bring air from attic or crawlspace and bypass filter grille, caussing dust, discomfort, backdrafting (CO), high bills, and mold 15
Energy Wasted Appliances – High Efficiency ◦ AC units (13 SEER+) – each SEER improvement saves approx. $250/yr Tonnage - Bigger is NOT Better Causes short cycling Reduced Life, Efficiency, Dehumidification, Filter Effectiveness ◦ Energy Star Appliances – are generally 40%+ more efficient than standard appliances ◦ LED or CFL light bulbs – reduces lighting costs over 50% and increase bulb life 300% ◦ Low Flow Toilets & Showers – reduces water flow 40+% ◦ Choose Gas over Electric Appliances – 1 to 4 cost ratio 16
Energy Wasted Controls ◦ Programmable Thermostats Raise/lower “away” temperature 10 degrees – each hour saves about $1.50 Raise/lower living temperature – each degree is worth 3%-6% in cooling/heating cost ◦ Hot Water Heater Settings Set at 120°F (minimum due to germs) Each 20°F reduction saves $17/yr (gas) $95/yr (elect) 17
Measuring Energy Measuring Devices ◦ Kill-A-Watt Meter – used to test the energy use of plug-in appliances ◦ Blue Line Meter – monitors the electric meter, registering changes in energy usage and real time cost of energy usage ◦ Incense Sticks – place a lit stick near windows and doors. If the smoke moves, you have a leak. Seal it. ◦ Your nose – if you smell gas (rotten egg smell), leave the house and then call 911. 18
Changing Behavior Turn it OFF ◦ Lights & Computers – 100 watts, 10 hrs/day, at 10±/kWh = 10±/day or $36.50/yr Use “smart” surge protectors. Keep it CLEAN –filters and coils; air conditioner & furnace (savings of 15%) COVER it UP – pools; roof turbines Have it TESTED – AC & furnace Keep a LIST ◦ Appliance maintenance dates ◦ Service companies & personnel 19
Measuring Results & Calculating Savings Tracking your energy usage using your energy bills ◦ Benchmark – record your past year’s bills ◦ Make changes to more efficient appliances ◦ Record each month’s energy bill ◦ Look for changes – reduction in energy & cost Use a simple excel program to record energy changes & calculate energy savings 20
Sample Excel Program ENERGY Management Program for: Name Enter data in Blue areas Location City/Zip Base Year Before Changes Electricity: Natural Gas: Year: 2012 Energy (kWh) Base Rate ($/kWh) Cost ($) Base Usage (MCF) Base Rate ($/MCF) Cost ($) Base January 701 $ 0.0959 $ 67.20 13.2 $ 8.3114 $ 109.71 February 505 $ 0.0977 $ 49.33 18.0 $ 7.5467 $ 135.84 March 506 $ 0.0976 $ 49.41 4.7 $ 10.9170 $ 51.31 April 587 $ 0.0967 $ 56.79 3.0 $ 12.0467 $ 36.14 May 933 $ 0.1054 $ 98.36 1.5 $ 14.3800 $ 21.57 June 1,027 $ 0.0990 $ 101.71 1.8 $ 14.1056 $ 25.39 July 1,238 $ 0.0964 $ 119.40 1.6 $ 16.1188 $ 25.79 August 1,323 $ 0.0987 $ 130.56 1.5 $ 17.4867 $ 26.23 September 1,077 $ 0.1000 $ 107.70 1.0 $ 20.7800 $ 20.78 October 638 $ 0.1138 $ 72.59 1.7 $ 14.3588 $ 24.41 November 591 $ 0.1157 $ 68.37 4.8 $ 10.7792 $ 51.74 December 573 $ 0.1165 $ 66.77 11.8 $ 9.1322 $ 107.76 Total: 9,699 $ 0.1028 $ 988.19 65 $ 12.9969 $ 636.67 21
Sample Excel Program ENERGY Management Program for: Name Enter data in Blue areas Location City/Zip Base Year Before Changes Electricity: Natural Gas: Water: Usage (MCF) Usage (gal) Year: 2012 Energy (kWh) Base Rate ($/kWh) Cost ($) Base Base Rate ($/MCF) Cost ($) Base Base Rate ($/kgal) Cost ($) Base January 701 $ 0.0959 $ 67.20 13.2 $ 8.3114 $ 109.71 4,000 $ 8.3925 $ 33.57 February 505 $ 0.0977 $ 49.33 18.0 $ 7.5467 $ 135.84 5,000 $ 7.6800 $ 38.40 March 506 $ 0.0976 $ 49.41 4.7 $ 10.9170 $ 51.31 4,000 $ 8.3925 $ 33.57 April 587 $ 0.0967 $ 56.79 3.0 $ 12.0467 $ 36.14 5,000 $ 7.6800 $ 38.40 May 933 $ 0.1054 $ 98.36 1.5 $ 14.3800 $ 21.57 5,000 $ 7.6800 $ 38.40 June 1,027 $ 0.0990 $ 101.71 1.8 $ 14.1056 $ 25.39 4,000 $ 8.3925 $ 33.57 July 1,238 $ 0.0964 $ 119.40 1.6 $ 16.1188 $ 25.79 11,000 $ 6.0109 $ 66.12 August 1,323 $ 0.0987 $ 130.56 1.5 $ 17.4867 $ 26.23 14,000 $ 5.4879 $ 76.83 September 1,077 $ 0.1000 $ 107.70 1.0 $ 20.7800 $ 20.78 12,000 $ 5.8075 $ 69.69 October 638 $ 0.1138 $ 72.59 1.7 $ 14.3588 $ 24.41 11,000 $ 6.0109 $ 66.12 November 591 $ 0.1157 $ 68.37 4.8 $ 10.7792 $ 51.74 9,000 $ 6.4133 $ 57.72 December 573 $ 0.1165 $ 66.77 11.8 $ 9.1322 $ 107.76 6,000 $ 7.2050 $ 43.23 Total: 9,699 $ 0.1028 $ 988.19 65 $ 12.9969 $ 636.67 90,000 $ 7.0961 $ 595.62 Next Year Following Changes Electricity: Natural Gas: Water: Usage (MCF) Usage (gal) Year: 2013 Energy (kWh) New Rate ($/kWh) Cost ($) New New Rate ($/MCF) Cost ($) New New Rate ($/kgal) Cost ($) New January #DIV/0! #DIV/0! #DIV/0! February #DIV/0! #DIV/0! #DIV/0! March #DIV/0! #DIV/0! #DIV/0! April #DIV/0! #DIV/0! #DIV/0! May #DIV/0! #DIV/0! #DIV/0! June #DIV/0! #DIV/0! #DIV/0! July #DIV/0! #DIV/0! #DIV/0! August #DIV/0! #DIV/0! #DIV/0! September #DIV/0! #DIV/0! #DIV/0! October #DIV/0! #DIV/0! #DIV/0! November #DIV/0! #DIV/0! #DIV/0! December #DIV/0! #DIV/0! #DIV/0! 22 Total: 0 #DIV/0! $ - 0 #DIV/0! $ - 0 #DIV/0! $ -
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