Download - Recurve Home Energy Audit Report
Results of Your Home Energy AuditRogers Residence15 April 2009
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prepared for:Mike and Laurie Rogers1234 Maple LaneCotati, CA 94931
prepared by:Daniel BellHome Performance [email protected]
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Results of Your Home Energy AuditRogers Residence15 October 2009
summaryYour Concerns Root Causes
High air leakage (see pg. 8)•
Lack of adequate wall insulation •(see pg. 7)
Old appliances (pg.12)•
High air leakage (see pg. 8)•
High duct leakage (see pg. 9)•
High air leakage. (see pg. 8)•
Lack of adequate wall insulation •(see pg. 7)
House is drafty and dusty•
High utility bills•
Recommended Solutions
Air Sealing (see pg. 14)•
Wall Insulation (see pg. 17)•
Furnace Replacement •(see pg. 13)
Duct Replacement (see pg. 18)•
High Efficiency Air Filtration •(see pg. 13)
Appliance Replacement (see pg. 12)•
House is too cold all year•
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Results of Your Home Energy AuditRogers Residence15 October 2009
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key causes of comfort issuesAir LeakageMany holes throughout your house allow air to escape and infiltrate, making it difficult to maintain a constant temperature.
InsulationLack of insulation in your walls makes keeping your house warm or cool difficult.
Holes like this one in your crawlspace cause heated or cooled air to escape, resulting in drafts.
The red areas in this thermal scan show a lack of proper insulation in your walls.
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Results of Your Home Energy AuditRogers Residence15 October 2009
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key causes of efficiency issuesOld AppliancesAging appliances in your house are far less efficient than Energy Star models sold today.
LightingLighting your home is a significant portion of your electric bill.
Replacing your refrigerator will save you money on your utility bills.
The blue areas in this thermal scan show air leaks and a lack of proper insulation around your can lights.
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Results of Your Home Energy AuditRogers Residence15 October 2009
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key causes of health issuesDuct LeakageHoles in your ductwork pulls dirty air from crawlspaces into the rooms in your home.
Air LeakageHoles in your house allow air to be pulled in from dusty crawlspaces and attics
This photo, taken in your house, shows the dirt that gets pulled into circulation throughout your house.
This photo of a hole in your house shows the dirt that gets pulled into circulation throughout your home.
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Gas & Electric CostsTotal kWh* ConsumedAverage Cost per kWh
Total Electric Cost
Total Therms ConsumedAverageCostPerTherm••
Total Gas Cost
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utility bill summaryHow much are you spending on gas and electric per year?This chart shows how much you’re spending annually on utility bills and the amount that’s being spent on gas vs. electric.
As you might expect, the majority of gas consumption occurs during the winter for heating your home. Electric consumption tends to spike in winter due to additional lighting because of short days and in the summer months when you may run the AC to cool your home.
Results of Your Home Energy AuditRogers Residence15 October 2009
Cost of gas & Electric per month from April 2008 - March 2009
9,736$0.17
$1,678
699$1.36
$949
*kilowatt/hour. Used to quantify the amount of electrical energy delivered by electric utilities to consumers**a unit of heat energy equal to 10,000 BTUs. Therms are used to quantify the amount of natural gas or liquid propane delivered by utilities to consumers.
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energy lossWhere is energy being lost in your house?This chart shows which components in your house lose the most energy. By optimizing your home’s performance, it is possible to have a significant impact on heating and cooling loads thus improving energy efficiency as well as indoor air quality.
Energy Loss in Your HomeAmount of energy loss, in BTUh* by building component, on the coldest day of the year.
WallsAir LeakageDuct LeakageFloorsWindowsDuct Insulation
Total
16,80012,60011,4009,0007,2003,000
60,000
Amount of energy lost by building component, on the coldest day of the year in your area
Results of Your Home Energy AuditRogers Residence15 October 2009
*British Thermal Unit, a unit of energy. BTUh is used to quantify the heat loss or heat gain through the building envelope, as well as the power needed for domestic hot water
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Insulation Type & R-ValueInsulation TypeInstallation QualitySystem R-Value
Recommended R-Value: R-19 or greater
Percentage of Heating Energy Loss
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wall insulationHow well are your walls insulated?As part of a walkthrough of your house, we used an infrared camera to asses the insulation levels in various areas of your building’s envelope. Lack of insulation results in the shell being the single largest heating load component.
Results of Your Home Energy AuditRogers Residence15 October 2009
R-13 2x4Average8.4
In this photo you can see that this wall is missing a significant amount of insulation.
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Air Changes Per HourEnvelope Leakage at CFM50*Natural ACH** (Air Change Per Hour)ASHRAE*** Recommended LevelEquivalent to a Hole This Size in Your Home
Percentage of Heating Energy Loss
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air leakageHow drafty is your home?As part of the audit, we performed a blower door test to measure the leakiness of your house. We can estimate the number of times per hour all of the air in your house is exchanged with the outside air. A higher number means that your house is draftier and uses more energy. Envelope leakage can also affect other building systems and impact indoor air quality and the comfort of your home. We use the blower door test to simulate naturally occurring conditions within your home.
Many holes like this create drafts
Results of Your Home Energy Audit Rogers Residence15 October 2009
49250.950.3518 in2
* Cubic Feet per Minute. Used to quantify the air flow through duct work, air infiltration, or ventilation**Air Changes per Hour. The measure of air infiltration or air cleaning. It represents the number of times each hour that an enclosure’s – typically a house – total volume of air is exchanged with fresh or filtered air***American Society of Heating, Refrigerating, and Air Conditioning Engineers
We found many holes like the one pictured above. All together, these holes make it hard to maintain a comfortable temperature in your home.
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Duct Leakage & Insulation% of Energy Lost Through Duct Leakage% of Energy Lost From Duct Insulation
Insulation Type and R-ValueInsulation Value: NoneRadiant Barrier: None
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duct leakage & insulationHow leaky is your ductwork?Uninsulated and unsealed ducts waste energy and make it difficult to deliver hot or cool air from your HVAC system to rooms in your house.
Results of Your Home Energy AuditRogers Residence15 October 2009
As you can see in this photo, the ducts aren’t insulated, allowing valuable heat to escape.
19%5%
Percentage of Heating Energy Loss
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Insulation Type & R-ValueInsulation TypeSystem R-Value
Recommended R-Value: R-13 or greater
Percentage of Heating Building Load
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floor insulationHow well is your floor insulated?As part of a walkthrough of the building, we visually estimated the insulation levels in various areas of your building’s envelope. Insufficient or inadequately installed insulation can cause significant energy waste.
Results of Your Home Energy AuditRogers Residence15 October 2009
None9.1
This photo shows the bottom of the floor boards where there is no insulation.
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Annual cost of lighting your house
$428Estimated percentage of your electric bill
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lighting efficiencyHow much do you pay to light your house?Lighting can be a major energy drain. While incandescent bulbs continue to be the most common lighting source in homes today, they are the least efficient and shortest-lasting option. 90% of the energy used to light an incandescent bulb is released as heat instead of light. Compact Florescent (CFL) bulbs provide very comparable light quality as compared with traditional incandescents, but only use 25% of the energy.
Results of Your Home Energy AuditRogers Residence15 October 2009
Lighting cost per room
LocationFamily RoomOfficeDiningKitchenMaster BedroomMaster BathroomTimmy’s BedroomGuest RoomSecond Bath
Total
Annual Cost$103$73$52$99$48$17$16$12$8
$42825%
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Annual cost of elecricity used by appliances
$980Estimated percentage of your electric bill
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appliance efficiencyHow much do your appliances cost?We’ve estimated the annual cost of operating your appliances based on typical use. See our recommendations for an estimate of how much you could save if you replaced some of your appliances with Energy Star models.
Results of Your Home Energy AuditRogers Residence15 October 2009
Yearly cost of operating your appliances
Type
Refrigerator
Dishwasher
Washer
Dryer
Brand
Sears
Bosch
GE
GE
Age
1998
1998
1998
2003
kWh/yr
851
641
526
909
Annual Cost
$340
$100
$200
$340
Total $980
58%
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recommendationsA custom roadmap to addressing your concerns
Results of Your Home Energy AuditRogers Residence15 October 2009
Basic
Air Sealing•
Appliance Replacement•
Lighting Upgrade•
Essential
Wall Insulation•
Duct Replacement•
High Efficiency Air •Filtration
Ultimate
Furnace Replacement•
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air sealingResults of Your Home Energy AuditRogers Residence15 October 2009
Before: An unsealed hole in your house
After: Example of a sealed hole
Benefits of Air Sealing
Improves indoor air quality by reducing air infiltration •from crawlspace and attic
Increases energy efficiency by reducing loss of •conditioned air through leakage points i.e. leaks around canlights, plumbing and electrical penetrations
Increases indoor comfort by reducing draftiness of the •home
What to Expect
Sealing process reduces envelope leakage by at least •20%
Recurve uses materials such as foam board, expanding •foam, caulk and fire rated material to seal penetrations to the extent necessary
Provide certificate of improvement using Blower Door •test
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appliance replacementBenefits of Buying New AppliancesWhen buying an appliance, remember that it has two price tags: what you pay to take it home and what you pay for the energy and water it uses. Look for Energy Star qualified appliances - they use 10-50% less energy and water than standard models. The money you save on your utility bills can more than make up for the cost of a less expensive and less efficient model.
Results of Your Home Energy AuditRogers Residence15 October 2009
Replacing your refrigerator will save you money on your utility bills.
Energy Star qyuality appliances use 10-50% less energy and water than standard models.
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SavingsAnnual Dollars$7-$11
Lifetime Dollars$90-$150
kWh
CO2
CostEst. Purchase Price$280-$480
Annual Energy Cost$150-$180
Current Dimensions42”H x 34”W x 29”D
40-60 kWh/yr
40-70 lbs/yr
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refrigeratorReplace your old refrigerator with a new, energy-efficient model and you could save up to $1,200 over the life of the new machine.
Results of Your Home Energy AuditRogers Residence15 October 2009
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SavingsAnnual Dollars$35-$59
Lifetime Dollars$700-$1,200
kWh
CO2
CostEst. Purchase Price$900-$1,600
Annual Energy Cost$80-$100
Current Dimensions70”H x 35.5”W x 32”D
washerReplace your old washing machine with a new, energy-efficient model and you could save up to $610 over the life of the new machine.
dryerReplace your old clothes dryer with a new, energy-efficient model and you could save up to $100 over the life of the new machine.
200-330 kWh/yr
220-360 lbs/yr
SavingsAnnual Dollars$25-$46
Lifetime Dollars$370-$610
Water
Gas (therms)
CO2
CostEst. Purchase Price$500-$900
Annual Energy Cost$50-$60
Annual Water Cost$16-$20
Current Dimensions42”H x 34”W x 29”D
5,900-9,900 gal/yr
17-28 therms/yr
200-330 lbs/yr
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lighting upgradeBenefits of a Lighting Upgrade
Lighting can make up a significant portion of a home’s electricity consumption•
The utilities tiered pricing structure allows major gains from electricity reduction•
Best results achieved with complete retrofit•
Results of Your Home Energy AuditRogers Residence15 October 2009
The blue areas in this thermal scan show air leaks and a lack of proper insulation around your can lights.
Properly insulated and sealed can lights will prevent significant energy waste.
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wall insulationBenefits Of Wall Insulation
Increased energy savings through reduced heat loss •with R-3.6 per inch or greater
Reduced noise and vibration transmission from outside•
What to Expect
Floor and furniture covered and protected as required•
2-3 vertical holes drilled in each stud bay•
Exterior wall cavities filled with insulation to •manufacturers specified density
Holes plugged with rough patch (texture and paint not •included)
Results of Your Home Energy AuditRogers Residence15 October 2009
Missing wall insulation in your house
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duct replacementResults of Your Home Energy AuditRogers Residence15 October 2009
Before: A disconnected duct in your house
Benefits of Duct Replacement
Dramatically increases indoor air quality by eliminating •return air leakage
Increases comfort through properly designed air •distribution to each room
Increases efficiency by reducing duct leakage and static •pressure
Exisiting ductwork completely removed and disposed of •or recycled
What to Expect
Recurve Triple Sealing Technology uses water based, •low VOC mastic
Ducts designed to meet specifications of ACCA manuals •J,D, and T
Install wireflex or KD duct work•
Target duct leakage is less than 6% where all ducts are •accessible
After: Triple sealed wireflex duct work
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every day energy saversResults of Your Home Energy AuditRogers Residence15 October 2009
Clean or Replace HVAC Filters
If your HVAC system is trying to circulate air •through dirty filters, it works harder and costs you more to heat or cool your home.
Changing or cleaning filters monthly – or at least •every three months – will make it easier on your heating and cooling system and will even make the air in your home cleaner and healthier for your family.
Also, don’t ignore HVAC system maintenance. •Servicing your heating and cooling system every one or two years can cut your bills by 3% to 10%.
Replace Incandescent Bulbs with CFLs:
Standard incandescent light bulbs use more than •90% of their energy to generate heat, not light.
An ENERGY STAR compact fluorescent bulb (CFL) •is the most energy-efficient of all light bulbs, using 75% less energy and lasting up to 10 times longer than an incandescent bulb.
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Replacing an incandescent bulb with a CFL can •save about $30 or more in electricity costs over the bulb’s lifetime.
Use Power Strips
Even when they are turned “off,” many products •are still using energy.
Plug all of these devices into power strips or surge •protectors, and when not in use, simply flip the switch on each strip to deactivate everything at once.
Install Timers
A timer can cut back on energy costs by turning •your electrical devices off at a predetermined time.
Much like a power strip, a timer can help also help •eliminate phantom energy, which accounts for 5% of your annual energy usage. Instead of going into a standby mode, your devices are completely powered down when controlled by a timer.
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every day energy savers (continued)
Results of Your Home Energy AuditRogers Residence15 October 2009
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Install Low-flow Shower Heads and Aerators
Low-Flow Shower Heads•
A low-flow showerhead uses about 2.5 gallons of •water per minute (GPM) as opposed to 6 GPM from old showerheads.
That means you can save 35 gallons of water •during a 10-minute shower, which saves your furnace from heating more water, too.
Aerators
Installing a low-flow aerator on your kitchen faucet •also reduces water use greatly (faucets made after 1994 already have these).
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weekend projectsResults of Your Home Energy AuditRogers Residence15 October 2009
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Install a programmable thermostat❑q
Install an energy star qualified ceiling fan❑q
Install dimmer switches ❑q
Install motion sensors❑q
Install energy star qualified lighting fixtures❑q
Install a watersense toilet❑q
Install a watersense faucet❑q
Insulate your water heater and wrap hot water pipes – water❑q
Find and seal airleaks around doors, windows, and baseboards❑q
Install insulating window treatments❑q