Polk County Soils and Crops Conference - Bolivar, MO 4/17/2012 1 Energy Efficiency and Fuel Conservation for Home & Farm Bob Schultheis Natural Resource Engineering Specialist 2 The Money Bottom Line “You’re not actually saving any money until you have recaptured the money you spent to do the energy measure.” 3 Where to Start No one thing will magically cut energy expenses a lot Many little things all add up to greatly-reduced costs Calculate the “life-cycle cost” Cost of installation + cost of operation over lifetime Concentrate first on no-cost / low-cost options that offer biggest savings 4 Homes 5 Direct Energy Use - Household 0 5 10 15 20 25 30 35 40 45 Misc. Lighting Refrigeration Cooking Water Heating Heating & A/C Automobile Percent of Total 6 Basic Rule of Heat Transfer Heat always flows from a warmer area to a colder area HOT COLD
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Polk County Soils and Crops
Conference - Bolivar, MO
4/17/2012
1
Energy Efficiency and Fuel Conservation for
Home & Farm
Bob Schultheis
Natural Resource Engineering Specialist
2
The Money Bottom Line
“You’re not actually
saving any money until
you have recaptured the
money you spent to do
the energy measure.”
3
Where to Start
� No one thing will magically cut energy expenses a lot
� Many little things all add up to greatly-reduced costs
� Calculate the “life-cycle cost”
� Cost of installation + cost of operation over lifetime
� Concentrate first on no-cost / low-cost
options that offer biggest savings
4
Homes
5
Direct Energy Use - Household
0 5 10 15 20 25 30 35 40 45
Misc.
Lighting
Refrigeration
Cooking
Water Heating
Heating & A/C
Automobile
Percent of Total6
Basic Rule of Heat Transfer
Heat always flows from a
warmer area to a colder area
HOT COLD
Polk County Soils and Crops
Conference - Bolivar, MO
4/17/2012
2
7
Four Types of Heat Loss
� Conduction = heat transfer through solids
� 6 inches of fiberglass = 8 feet of brick
� Convection = heat transfer through liquids & gases
� 1/8” door gap = 6” round hole
� Radiation = heat transfer w/o solids, liquids or gases
� Example: Warming by sunlight
� Ventilation = for health, moisture control
� 30-50% R.H. indoors is ideal
8
Home Heat Loss Example
Infiltration
37%
Walls
15%
Ceiling
11%
Floor
21%Glass
13%
Doors
3%
1500 sq. ft. home with crawl space
R-19
R-30
R-13R-1.6
R-3.2
9
Seal Out the “Stack Effect”
10
What You Can Do NOW to Save $$
The $100 solution for your home = PLUG THE HOLES
Caulking
Weatherstrip
Water heater insulation blanket
Expandable foam
Foil duct tape
Outletinsulators
11
Weatherize Against Infiltration
� Wiring, pipe & duct penetrations in attic,under floor & through walls
� Caulking where dissimilar materials meet
� Weatherstripping doors, windows & sills
� Outlet insulators on exterior walls
� Vapor barriers
� 20 GPD evaporates fromcrawl space into air of1400 sq.ft. home
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