myth vs. reality - north carolina energy efficiency...
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North Carolina ENERGY STAR Conference“Saving the World One House at a Time”
November 15, 2007,
Energy Efficient Homes
Top Ten List:
Myth vs. RealitySam Rashkin, R.A.
National Director ENERGY STAR for HomesNational Director, ENERGY STAR for Homes
Myth:Myth No. 2:
Myth:Build Tight, Ventilate Right
Reality:Reality:Build Tight,Build Tight, Maximize Source Control, Ventilate as Needed
Source Control
• Moisture [Bulk, Vapor][ , p ]• Radon• Combustion Emissions• Combustion Emissions • Toxic Building Materials• Biological Pollutants
…plus Educate Home Owners!
Myth:Myth No. 3:
Myth:Wood Framing Increasing in Cost
Reality:Reality:Wood Framing Must be FreeWood Framing Must be Free
Where 4 5 must and 9 isWhere 4 is good;
5 must be better;
and 9 is Great!
Courtesy of Building Science Corp.
Effective R-Value Example:U i l t d C /I t tiUninsulated Corners/Intersections
uninsulated corner uninsulated wall intersection
Myth:Myth No. 5:
Myth:SEER and AFUE = Efficiency
Reality:Reality:Best Practices HVAC = EfficiencyBest Practices HVAC = Efficiency
Equipment Right-Sizing
Right-Sized HVAC EquipmentL O ti C t
Right-Sized EquipmentLower Operating Cost
78
Lower Operating Cost
4567
ER
~~30% > eff.30% > eff.
ER
1234
EE
Increase cycle time Increase cycle time from 3 to 8 min.from 3 to 8 min.
EE
01
0 1 2 3 4 5 6 7 8 9 10 11
Run-Time (minutes)Run-Time (minutes)
Best Practice HVACRight-Sizing Equipment (ACCA Manual J/S)
Ducts (ACCA Manual D)Terminals (ACCA Manual T)
Air Distribution( )
Air-Tight/Internal DuctsCompact DuctsStatic Pressure
Flow Across CoilRoom-by-Room Air FlowRoom by Room Air Flow
Pressure BalancingExhaust Fan Flow Rates
Air Handler Air-Tight CabinetHigh-Efficiency Fan
Refrigerant Charge TestingTXV Valve
Myth:Myth No. 6:Myth:Myth No. 6:% > Code Defines Efficiency
R litReality:% C d Mi L H i F it% > Code Misses Low Hanging Fruit
Low Hanging Fruit *Missed by Code-Based Programs*
• Moisture Control• Effective R-Value• Solar Orientation• Efficient Water Distribution• Efficient Water Distribution• Best Practice HVAC Systems• Advanced Lighting• Size* some exceptions
Myth:Myth No 7:Myth:Myth No. 7:Defects Out Of Sight Out of MindDefects Out Of Sight, Out of Mind
Reality:Defects No Longer Invisible
AFFORDABILITY PROBLEMS:Defects No Longer InvisibleAIR LEAKAGE
11
2
3 443
6
55
Courtesy of Building Science Corp.Courtesy of Building Science Corp.
CODE NONCOMPLIANCE EXPOSED
Most thermal bypass details required by code but not enforcedby code but not enforced…
Are builders still liable?
The Ultimate Scary Man
“Construction defectsConstruction defectscan dramatically change the comfort and quality
f h W h l !of your home… We can help!...
O $430 000 000Over $430,000,000awarded to our clients!!!”awarded to our clients!!!
http://www.kasdansimonds.com/constructiondefects.asp
Myth:Myth No. 8:Myth:Myth No. 8:Minimize Cost During Soft Market
Reality:Maximize Value During Soft Market
Minimize Cost: Maximize Value:ENERGY STAR Cost:
$2,500New Home Avg. Cost:
$500,00+
100 Home Subdivision <1%vs.
Purch. Man. Dilemma: $2,500 x 100 homes =
<1%investment
• Visible Quality $ ,
$ 25• Obsolete Competition• Reduced Liability
I d S ti f ti$.25million • Increased Satisfaction• Recognition as Leader
Point Categories = Complexity:
• Innovation and Design Processg• Location and Linkages• Sustainable Sites• Sustainable Sites• Water Efficiency• Energy and Atmosphere• Materials and Resources• Indoor Environmental Quality• Awareness and Education• Awareness and Education
What Else Do Homebuyers Care About?• Schools• Low Maintenance• Low Maintenance• Security• Energy EfficiencyEnergy Efficiency• Indoor Air Quality• Allergy Resistance
What if every valued attribute Allergy Resistance
• Disaster Resistance• Structured Wiring
was offered in 4 shades?g
• Finish Package• Appliance Packagepp g…and the list goes on
Does Green Pass the ‘Laugh Test’?
• Truly Energy Efficient?
Does Green Pass the Laugh Test ?
• Truly Energy Efficient? • Truly Water Efficient?• Truly Durable?
[Assured Bulk Moisture Control]
• Truly Healthy? [Toxic Material Limitations]
• Truly Resource Efficient?[Sustainable Products, Job-Site Waste]
….and the list goes on
Example: 800 kWh/month home O ti 1 Z E (2 kW PV S t )Option 1: Zero Energy (2 kW PV System)Revenue: Cost:Revenue:2 kW x 5 hr./day = 10 kWh/day
Cost:2 kW x $10,000/kW =$20,00010 kWh/day
X 30 day/mo. =300/kWh/month
$20,000
X $.13/kWh =
$40/monthat 6.5% mortgage =
$140/month$40/month $140/monthPlus: Insurance/Maintenance:Insurance/Maintenance:$10-20/month?
Example: 800 kWh/month homeOption 2: Carbon Neutral Home
A tiAssumptions:$.045 renewable power premium from utility
Cost :300 kWh/mo. x $.045/kWh =
~$15/month near carbon ne tral~$15/month = near carbon neutral800 kWh/mo. x $.045/kWh =
~$35/month = carbon neutral
Example: 800 kWh/month home:pComparison
Z E H C b N t l HZero Energy Home:2 kW PV System
Carbon Neutral Home:$.045/kWh RP premium
-$100+/month500 kWh/month
-$15/month500 kWh/month 500 / o
carbon footprint500 / ocarbon footprint
5.5 kW PV System
-$250+/month -$35/month$250+/monthno carbon footprint
$35/monthno carbon footprint
Myth Busting Strategy: ENERGY STAR
Myth:
#1: Sale Agents
Myth:Marketing Tools:• Established ‘Brand’• Established Brand• Web Site• Outreach Campaign• Sales ToolKit• Sales Training
Myth Busting Strategy: ENERGY STAR
Myth:
#2: Build Tight, Ventilate Right#3: Wood Framing Increasing in Cost
#4 #5 #6: Flawed Metrics: R-Value SEER/AFUE CodeMyth:#4, #5, #6: Flawed Metrics: R Value, SEER/AFUE, Code#7: Defects Out of Sight, Out of Mind#8: Minimize Cost During Soft Market
Technical Specifications:Technical Specifications:• Old Specifications
N S ifi ti• New Specifications• Indoor Air Package• Future Specifications
ENERGY STAR For Homes Old Spec
Ti ht Ad dAd d Effi i t Fi ldAiTight Ducts
AdvancedAdvancedWindowsWindows
EfficientEquipment
FieldVerified
AirSealing
ENERGY STAR For Homes N SNew Spec
InsulationI t ll ti Thermal Bypass Right SizingInstallation Thermal Bypass Right Sizing
ENERGY STAR Indoor Air Packageg
•Radon Control•Pest Management
+Moisture
+•Pest Management•HVAC Systems•Combustion Systems
=MoistureControl
y•Materials INDOOR AIR
PACKAGE
ENERGY STAR For Homes F t SFuture Spec
ThermalBridging
HVACSystem
WaterDistrib.
Lighting/App. SizeHigh Eff.
Equip.
+MoistureMoistureControl
Myth Busting Strategy: ENERGY STAR
Myth:
#9: Green#10: Zero Energy Home
Myth:
Future Developments:Future Developments:• Green Begins with Blue
Carbon Neutral Home• Carbon Neutral Home
‘Green’ Begins with ‘Blue’D fi i G d M ki it Si lDefining Green and Making it Simple
Resource
Indoor
ResourceEfficiency
•WaterMaterials
Energy Efficiency
Environment•Bulk Moisture•Radon
•Materials•Waste
Efficiency•Envelope•DistributionEquipment
•Pest Control•HVAC•Combust. Safety
•Equipment•Lighting•Appliances
•Materials
EPA W t SENERGY STARENERGY STAR
EPA Water Sense+ 6 Mandatory Items+ 6 Mandatory ItemsENERGY STAR IAPENERGY STAR IAP
ENERGY STAR C b N t l HCarbon Neutral Home
ENERGY STAR
+ENERGY STARFuture Spec
On-SiteRenewable
+CarbonOffsets
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